Simplify Redis directory configuration

Jacob Vosmaer
1 parent 81c3ccfa
Showing 4 changed files with 696 additions and 703 deletions Show diff stats
files/gitlab-cookbooks/gitlab/attributes/default.rb
files/gitlab-cookbooks/gitlab/recipes/redis.rb
files/gitlab-cookbooks/gitlab/templates/default/redis.conf
files/gitlab-cookbooks/gitlab/templates/default/redis.conf.erb
@@ -64,7 +64,6 @@ default[&#39;gitlab&#39;][&#39;postgresql&#39;][&#39;checkpoint_warning&#39;] = &quot;30s&quot;
 default['gitlab']['redis']['enable'] = true
 default['gitlab']['redis']['ha'] = false
 default['gitlab']['redis']['dir'] = "/var/opt/gitlab/redis"
-default['gitlab']['redis']['data_dir'] = "/var/opt/gitlab/redis/data"
 default['gitlab']['redis']['log_directory'] = "/var/log/gitlab/redis"
 default['gitlab']['redis']['svlogd_size'] = 1000000
 default['gitlab']['redis']['svlogd_num'] = 10
@@ -35,13 +35,7 @@ directory redis_dir do
   mode "0700"
 end
-directory redis_data_dir do
-  owner node['gitlab']['redis']['username']
-  mode "0700"
-  recursive true
-end
-
-redis_config = File.join(redis_data_dir, "redis.conf")
+redis_config = File.join(redis_dir, "redis.conf")
 template redis_config do
   source "redis.conf.erb"
@@ -1,695 +0,0 @@
-# Redis configuration file example
-
-# Note on units: when memory size is needed, it is possible to specify
-# it in the usual form of 1k 5GB 4M and so forth:
-#
-# 1k => 1000 bytes
-# 1kb => 1024 bytes
-# 1m => 1000000 bytes
-# 1mb => 1024*1024 bytes
-# 1g => 1000000000 bytes
-# 1gb => 1024*1024*1024 bytes
-#
-# units are case insensitive so 1GB 1Gb 1gB are all the same.
-
-# By default Redis does not run as a daemon. Use 'yes' if you need it.
-# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
-daemonize no
-
-# When running daemonized, Redis writes a pid file in /var/run/redis.pid by
-# default. You can specify a custom pid file location here.
-pidfile /var/run/redis.pid
-
-# Accept connections on the specified port, default is 6379.
-# If port 0 is specified Redis will not listen on a TCP socket.
-port 6379
-
-# By default Redis listens for connections from all the network interfaces
-# available on the server. It is possible to listen to just one or multiple
-# interfaces using the "bind" configuration directive, followed by one or
-# more IP addresses.
-#
-# Examples:
-#
-# bind 192.168.1.100 10.0.0.1
-# bind 127.0.0.1
-
-# Specify the path for the unix socket that will be used to listen for
-# incoming connections. There is no default, so Redis will not listen
-# on a unix socket when not specified.
-#
-# unixsocket /tmp/redis.sock
-# unixsocketperm 755
-
-# Close the connection after a client is idle for N seconds (0 to disable)
-timeout 0
-
-# TCP keepalive.
-#
-# If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
-# of communication. This is useful for two reasons:
-#
-# 1) Detect dead peers.
-# 2) Take the connection alive from the point of view of network
-#    equipment in the middle.
-#
-# On Linux, the specified value (in seconds) is the period used to send ACKs.
-# Note that to close the connection the double of the time is needed.
-# On other kernels the period depends on the kernel configuration.
-#
-# A reasonable value for this option is 60 seconds.
-tcp-keepalive 0
-
-# Specify the server verbosity level.
-# This can be one of:
-# debug (a lot of information, useful for development/testing)
-# verbose (many rarely useful info, but not a mess like the debug level)
-# notice (moderately verbose, what you want in production probably)
-# warning (only very important / critical messages are logged)
-loglevel notice
-
-# Specify the log file name. Also the emptry string can be used to force
-# Redis to log on the standard output. Note that if you use standard
-# output for logging but daemonize, logs will be sent to /dev/null
-logfile ""
-
-# To enable logging to the system logger, just set 'syslog-enabled' to yes,
-# and optionally update the other syslog parameters to suit your needs.
-# syslog-enabled no
-
-# Specify the syslog identity.
-# syslog-ident redis
-
-# Specify the syslog facility. Must be USER or between LOCAL0-LOCAL7.
-# syslog-facility local0
-
-# Set the number of databases. The default database is DB 0, you can select
-# a different one on a per-connection basis using SELECT <dbid> where
-# dbid is a number between 0 and 'databases'-1
-databases 16
-
-################################ SNAPSHOTTING  #################################
-#
-# Save the DB on disk:
-#
-#   save <seconds> <changes>
-#
-#   Will save the DB if both the given number of seconds and the given
-#   number of write operations against the DB occurred.
-#
-#   In the example below the behaviour will be to save:
-#   after 900 sec (15 min) if at least 1 key changed
-#   after 300 sec (5 min) if at least 10 keys changed
-#   after 60 sec if at least 10000 keys changed
-#
-#   Note: you can disable saving at all commenting all the "save" lines.
-#
-#   It is also possible to remove all the previously configured save
-#   points by adding a save directive with a single empty string argument
-#   like in the following example:
-#
-#   save ""
-
-save 900 1
-save 300 10
-save 60 10000
-
-# By default Redis will stop accepting writes if RDB snapshots are enabled
-# (at least one save point) and the latest background save failed.
-# This will make the user aware (in an hard way) that data is not persisting
-# on disk properly, otherwise chances are that no one will notice and some
-# distater will happen.
-#
-# If the background saving process will start working again Redis will
-# automatically allow writes again.
-#
-# However if you have setup your proper monitoring of the Redis server
-# and persistence, you may want to disable this feature so that Redis will
-# continue to work as usually even if there are problems with disk,
-# permissions, and so forth.
-stop-writes-on-bgsave-error yes
-
-# Compress string objects using LZF when dump .rdb databases?
-# For default that's set to 'yes' as it's almost always a win.
-# If you want to save some CPU in the saving child set it to 'no' but
-# the dataset will likely be bigger if you have compressible values or keys.
-rdbcompression yes
-
-# Since version 5 of RDB a CRC64 checksum is placed at the end of the file.
-# This makes the format more resistant to corruption but there is a performance
-# hit to pay (around 10%) when saving and loading RDB files, so you can disable it
-# for maximum performances.
-#
-# RDB files created with checksum disabled have a checksum of zero that will
-# tell the loading code to skip the check.
-rdbchecksum yes
-
-# The filename where to dump the DB
-dbfilename dump.rdb
-
-# The working directory.
-#
-# The DB will be written inside this directory, with the filename specified
-# above using the 'dbfilename' configuration directive.
-# 
-# The Append Only File will also be created inside this directory.
-# 
-# Note that you must specify a directory here, not a file name.
-dir ./
-
-################################# REPLICATION #################################
-
-# Master-Slave replication. Use slaveof to make a Redis instance a copy of
-# another Redis server. Note that the configuration is local to the slave
-# so for example it is possible to configure the slave to save the DB with a
-# different interval, or to listen to another port, and so on.
-#
-# slaveof <masterip> <masterport>
-
-# If the master is password protected (using the "requirepass" configuration
-# directive below) it is possible to tell the slave to authenticate before
-# starting the replication synchronization process, otherwise the master will
-# refuse the slave request.
-#
-# masterauth <master-password>
-
-# When a slave loses its connection with the master, or when the replication
-# is still in progress, the slave can act in two different ways:
-#
-# 1) if slave-serve-stale-data is set to 'yes' (the default) the slave will
-#    still reply to client requests, possibly with out of date data, or the
-#    data set may just be empty if this is the first synchronization.
-#
-# 2) if slave-serve-stale-data is set to 'no' the slave will reply with
-#    an error "SYNC with master in progress" to all the kind of commands
-#    but to INFO and SLAVEOF.
-#
-slave-serve-stale-data yes
-
-# You can configure a slave instance to accept writes or not. Writing against
-# a slave instance may be useful to store some ephemeral data (because data
-# written on a slave will be easily deleted after resync with the master) but
-# may also cause problems if clients are writing to it because of a
-# misconfiguration.
-#
-# Since Redis 2.6 by default slaves are read-only.
-#
-# Note: read only slaves are not designed to be exposed to untrusted clients
-# on the internet. It's just a protection layer against misuse of the instance.
-# Still a read only slave exports by default all the administrative commands
-# such as CONFIG, DEBUG, and so forth. To a limited extend you can improve
-# security of read only slaves using 'rename-command' to shadow all the
-# administrative / dangerous commands.
-slave-read-only yes
-
-# Slaves send PINGs to server in a predefined interval. It's possible to change
-# this interval with the repl_ping_slave_period option. The default value is 10
-# seconds.
-#
-# repl-ping-slave-period 10
-
-# The following option sets the replication timeout for:
-#
-# 1) Bulk transfer I/O during SYNC, from the point of view of slave.
-# 2) Master timeout from the point of view of slaves (data, pings).
-# 3) Slave timeout from the point of view of masters (REPLCONF ACK pings).
-#
-# It is important to make sure that this value is greater than the value
-# specified for repl-ping-slave-period otherwise a timeout will be detected
-# every time there is low traffic between the master and the slave.
-#
-# repl-timeout 60
-
-# Disable TCP_NODELAY on the slave socket after SYNC?
-#
-# If you select "yes" Redis will use a smaller number of TCP packets and
-# less bandwidth to send data to slaves. But this can add a delay for
-# the data to appear on the slave side, up to 40 milliseconds with
-# Linux kernels using a default configuration.
-#
-# If you select "no" the delay for data to appear on the slave side will
-# be reduced but more bandwidth will be used for replication.
-#
-# By default we optimize for low latency, but in very high traffic conditions
-# or when the master and slaves are many hops away, turning this to "yes" may
-# be a good idea.
-repl-disable-tcp-nodelay no
-
-# Set the replication backlog size. The backlog is a buffer that accumulates
-# slave data when slaves are disconnected for some time, so that when a slave
-# wants to reconnect again, often a full resync is not needed, but a partial
-# resync is enough, just passing the portion of data the slave missed while
-# disconnected.
-#
-# The biggest the replication backlog, the longer the time the slave can be
-# disconnected and later be able to perform a partial resynchronization.
-#
-# The backlog is only allocated once there is at least a slave connected.
-#
-# repl-backlog-size 1mb
-
-# After a master has no longer connected slaves for some time, the backlog
-# will be freed. The following option configures the amount of seconds that
-# need to elapse, starting from the time the last slave disconnected, for
-# the backlog buffer to be freed.
-#
-# A value of 0 means to never release the backlog.
-#
-# repl-backlog-ttl 3600
-
-# The slave priority is an integer number published by Redis in the INFO output.
-# It is used by Redis Sentinel in order to select a slave to promote into a
-# master if the master is no longer working correctly.
-#
-# A slave with a low priority number is considered better for promotion, so
-# for instance if there are three slaves with priority 10, 100, 25 Sentinel will
-# pick the one wtih priority 10, that is the lowest.
-#
-# However a special priority of 0 marks the slave as not able to perform the
-# role of master, so a slave with priority of 0 will never be selected by
-# Redis Sentinel for promotion.
-#
-# By default the priority is 100.
-slave-priority 100
-
-# It is possible for a master to stop accepting writes if there are less than
-# N slaves connected, having a lag less or equal than M seconds.
-#
-# The N slaves need to be in "online" state.
-#
-# The lag in seconds, that must be <= the specified value, is calculated from
-# the last ping received from the slave, that is usually sent every second.
-#
-# This option does not GUARANTEES that N replicas will accept the write, but
-# will limit the window of exposure for lost writes in case not enough slaves
-# are available, to the specified number of seconds.
-#
-# For example to require at least 3 slaves with a lag <= 10 seconds use:
-#
-# min-slaves-to-write 3
-# min-slaves-max-lag 10
-#
-# Setting one or the other to 0 disables the feature.
-#
-# By default min-slaves-to-write is set to 0 (feature disabled) and
-# min-slaves-max-lag is set to 10.
-
-################################## SECURITY ###################################
-
-# Require clients to issue AUTH <PASSWORD> before processing any other
-# commands.  This might be useful in environments in which you do not trust
-# others with access to the host running redis-server.
-#
-# This should stay commented out for backward compatibility and because most
-# people do not need auth (e.g. they run their own servers).
-# 
-# Warning: since Redis is pretty fast an outside user can try up to
-# 150k passwords per second against a good box. This means that you should
-# use a very strong password otherwise it will be very easy to break.
-#
-# requirepass foobared
-
-# Command renaming.
-#
-# It is possible to change the name of dangerous commands in a shared
-# environment. For instance the CONFIG command may be renamed into something
-# hard to guess so that it will still be available for internal-use tools
-# but not available for general clients.
-#
-# Example:
-#
-# rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52
-#
-# It is also possible to completely kill a command by renaming it into
-# an empty string:
-#
-# rename-command CONFIG ""
-#
-# Please note that changing the name of commands that are logged into the
-# AOF file or transmitted to slaves may cause problems.
-
-################################### LIMITS ####################################
-
-# Set the max number of connected clients at the same time. By default
-# this limit is set to 10000 clients, however if the Redis server is not
-# able to configure the process file limit to allow for the specified limit
-# the max number of allowed clients is set to the current file limit
-# minus 32 (as Redis reserves a few file descriptors for internal uses).
-#
-# Once the limit is reached Redis will close all the new connections sending
-# an error 'max number of clients reached'.
-#
-# maxclients 10000
-
-# Don't use more memory than the specified amount of bytes.
-# When the memory limit is reached Redis will try to remove keys
-# accordingly to the eviction policy selected (see maxmemmory-policy).
-#
-# If Redis can't remove keys according to the policy, or if the policy is
-# set to 'noeviction', Redis will start to reply with errors to commands
-# that would use more memory, like SET, LPUSH, and so on, and will continue
-# to reply to read-only commands like GET.
-#
-# This option is usually useful when using Redis as an LRU cache, or to set
-# an hard memory limit for an instance (using the 'noeviction' policy).
-#
-# WARNING: If you have slaves attached to an instance with maxmemory on,
-# the size of the output buffers needed to feed the slaves are subtracted
-# from the used memory count, so that network problems / resyncs will
-# not trigger a loop where keys are evicted, and in turn the output
-# buffer of slaves is full with DELs of keys evicted triggering the deletion
-# of more keys, and so forth until the database is completely emptied.
-#
-# In short... if you have slaves attached it is suggested that you set a lower
-# limit for maxmemory so that there is some free RAM on the system for slave
-# output buffers (but this is not needed if the policy is 'noeviction').
-#
-# maxmemory <bytes>
-
-# MAXMEMORY POLICY: how Redis will select what to remove when maxmemory
-# is reached. You can select among five behaviors:
-# 
-# volatile-lru -> remove the key with an expire set using an LRU algorithm
-# allkeys-lru -> remove any key accordingly to the LRU algorithm
-# volatile-random -> remove a random key with an expire set
-# allkeys-random -> remove a random key, any key
-# volatile-ttl -> remove the key with the nearest expire time (minor TTL)
-# noeviction -> don't expire at all, just return an error on write operations
-# 
-# Note: with any of the above policies, Redis will return an error on write
-#       operations, when there are not suitable keys for eviction.
-#
-#       At the date of writing this commands are: set setnx setex append
-#       incr decr rpush lpush rpushx lpushx linsert lset rpoplpush sadd
-#       sinter sinterstore sunion sunionstore sdiff sdiffstore zadd zincrby
-#       zunionstore zinterstore hset hsetnx hmset hincrby incrby decrby
-#       getset mset msetnx exec sort
-#
-# The default is:
-#
-# maxmemory-policy volatile-lru
-
-# LRU and minimal TTL algorithms are not precise algorithms but approximated
-# algorithms (in order to save memory), so you can select as well the sample
-# size to check. For instance for default Redis will check three keys and
-# pick the one that was used less recently, you can change the sample size
-# using the following configuration directive.
-#
-# maxmemory-samples 3
-
-############################## APPEND ONLY MODE ###############################
-
-# By default Redis asynchronously dumps the dataset on disk. This mode is
-# good enough in many applications, but an issue with the Redis process or
-# a power outage may result into a few minutes of writes lost (depending on
-# the configured save points).
-#
-# The Append Only File is an alternative persistence mode that provides
-# much better durability. For instance using the default data fsync policy
-# (see later in the config file) Redis can lose just one second of writes in a
-# dramatic event like a server power outage, or a single write if something
-# wrong with the Redis process itself happens, but the operating system is
-# still running correctly.
-#
-# AOF and RDB persistence can be enabled at the same time without problems.
-# If the AOF is enabled on startup Redis will load the AOF, that is the file
-# with the better durability guarantees.
-#
-# Please check http://redis.io/topics/persistence for more information.
-
-appendonly no
-
-# The name of the append only file (default: "appendonly.aof")
-# appendfilename appendonly.aof
-
-# The fsync() call tells the Operating System to actually write data on disk
-# instead to wait for more data in the output buffer. Some OS will really flush 
-# data on disk, some other OS will just try to do it ASAP.
-#
-# Redis supports three different modes:
-#
-# no: don't fsync, just let the OS flush the data when it wants. Faster.
-# always: fsync after every write to the append only log . Slow, Safest.
-# everysec: fsync only one time every second. Compromise.
-#
-# The default is "everysec", as that's usually the right compromise between
-# speed and data safety. It's up to you to understand if you can relax this to
-# "no" that will let the operating system flush the output buffer when
-# it wants, for better performances (but if you can live with the idea of
-# some data loss consider the default persistence mode that's snapshotting),
-# or on the contrary, use "always" that's very slow but a bit safer than
-# everysec.
-#
-# More details please check the following article:
-# http://antirez.com/post/redis-persistence-demystified.html
-#
-# If unsure, use "everysec".
-
-# appendfsync always
-appendfsync everysec
-# appendfsync no
-
-# When the AOF fsync policy is set to always or everysec, and a background
-# saving process (a background save or AOF log background rewriting) is
-# performing a lot of I/O against the disk, in some Linux configurations
-# Redis may block too long on the fsync() call. Note that there is no fix for
-# this currently, as even performing fsync in a different thread will block
-# our synchronous write(2) call.
-#
-# In order to mitigate this problem it's possible to use the following option
-# that will prevent fsync() from being called in the main process while a
-# BGSAVE or BGREWRITEAOF is in progress.
-#
-# This means that while another child is saving, the durability of Redis is
-# the same as "appendfsync none". In practical terms, this means that it is
-# possible to lose up to 30 seconds of log in the worst scenario (with the
-# default Linux settings).
-# 
-# If you have latency problems turn this to "yes". Otherwise leave it as
-# "no" that is the safest pick from the point of view of durability.
-no-appendfsync-on-rewrite no
-
-# Automatic rewrite of the append only file.
-# Redis is able to automatically rewrite the log file implicitly calling
-# BGREWRITEAOF when the AOF log size grows by the specified percentage.
-# 
-# This is how it works: Redis remembers the size of the AOF file after the
-# latest rewrite (if no rewrite has happened since the restart, the size of
-# the AOF at startup is used).
-#
-# This base size is compared to the current size. If the current size is
-# bigger than the specified percentage, the rewrite is triggered. Also
-# you need to specify a minimal size for the AOF file to be rewritten, this
-# is useful to avoid rewriting the AOF file even if the percentage increase
-# is reached but it is still pretty small.
-#
-# Specify a percentage of zero in order to disable the automatic AOF
-# rewrite feature.
-
-auto-aof-rewrite-percentage 100
-auto-aof-rewrite-min-size 64mb
-
-################################ LUA SCRIPTING  ###############################
-
-# Max execution time of a Lua script in milliseconds.
-#
-# If the maximum execution time is reached Redis will log that a script is
-# still in execution after the maximum allowed time and will start to
-# reply to queries with an error.
-#
-# When a long running script exceed the maximum execution time only the
-# SCRIPT KILL and SHUTDOWN NOSAVE commands are available. The first can be
-# used to stop a script that did not yet called write commands. The second
-# is the only way to shut down the server in the case a write commands was
-# already issue by the script but the user don't want to wait for the natural
-# termination of the script.
-#
-# Set it to 0 or a negative value for unlimited execution without warnings.
-lua-time-limit 5000
-
-################################## SLOW LOG ###################################
-
-# The Redis Slow Log is a system to log queries that exceeded a specified
-# execution time. The execution time does not include the I/O operations
-# like talking with the client, sending the reply and so forth,
-# but just the time needed to actually execute the command (this is the only
-# stage of command execution where the thread is blocked and can not serve
-# other requests in the meantime).
-# 
-# You can configure the slow log with two parameters: one tells Redis
-# what is the execution time, in microseconds, to exceed in order for the
-# command to get logged, and the other parameter is the length of the
-# slow log. When a new command is logged the oldest one is removed from the
-# queue of logged commands.
-
-# The following time is expressed in microseconds, so 1000000 is equivalent
-# to one second. Note that a negative number disables the slow log, while
-# a value of zero forces the logging of every command.
-slowlog-log-slower-than 10000
-
-# There is no limit to this length. Just be aware that it will consume memory.
-# You can reclaim memory used by the slow log with SLOWLOG RESET.
-slowlog-max-len 128
-
-############################# Event notification ##############################
-
-# Redis can notify Pub/Sub clients about events happening in the key space.
-# This feature is documented at http://redis.io/topics/keyspace-events
-# 
-# For instance if keyspace events notification is enabled, and a client
-# performs a DEL operation on key "foo" stored in the Database 0, two
-# messages will be published via Pub/Sub:
-#
-# PUBLISH __keyspace@0__:foo del
-# PUBLISH __keyevent@0__:del foo
-#
-# It is possible to select the events that Redis will notify among a set
-# of classes. Every class is identified by a single character:
-#
-#  K     Keyspace events, published with __keyspace@<db>__ prefix.
-#  E     Keyevent events, published with __keyevent@<db>__ prefix.
-#  g     Generic commands (non-type specific) like DEL, EXPIRE, RENAME, ...
-#  $     String commands
-#  l     List commands
-#  s     Set commands
-#  h     Hash commands
-#  z     Sorted set commands
-#  x     Expired events (events generated every time a key expires)
-#  e     Evicted events (events generated when a key is evicted for maxmemory)
-#  A     Alias for g$lshzxe, so that the "AKE" string means all the events.
-#
-#  The "notify-keyspace-events" takes as argument a string that is composed
-#  by zero or multiple characters. The empty string means that notifications
-#  are disabled at all.
-#
-#  Example: to enable list and generic events, from the point of view of the
-#           event name, use:
-#
-#  notify-keyspace-events Elg
-#
-#  Example 2: to get the stream of the expired keys subscribing to channel
-#             name __keyevent@0__:expired use:
-#
-#  notify-keyspace-events Ex
-#
-#  By default all notifications are disabled because most users don't need
-#  this feature and the feature has some overhead. Note that if you don't
-#  specify at least one of K or E, no events will be delivered.
-notify-keyspace-events ""
-
-############################### ADVANCED CONFIG ###############################
-
-# Hashes are encoded using a memory efficient data structure when they have a
-# small number of entries, and the biggest entry does not exceed a given
-# threshold. These thresholds can be configured using the following directives.
-hash-max-ziplist-entries 512
-hash-max-ziplist-value 64
-
-# Similarly to hashes, small lists are also encoded in a special way in order
-# to save a lot of space. The special representation is only used when
-# you are under the following limits:
-list-max-ziplist-entries 512
-list-max-ziplist-value 64
-
-# Sets have a special encoding in just one case: when a set is composed
-# of just strings that happens to be integers in radix 10 in the range
-# of 64 bit signed integers.
-# The following configuration setting sets the limit in the size of the
-# set in order to use this special memory saving encoding.
-set-max-intset-entries 512
-
-# Similarly to hashes and lists, sorted sets are also specially encoded in
-# order to save a lot of space. This encoding is only used when the length and
-# elements of a sorted set are below the following limits:
-zset-max-ziplist-entries 128
-zset-max-ziplist-value 64
-
-# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
-# order to help rehashing the main Redis hash table (the one mapping top-level
-# keys to values). The hash table implementation Redis uses (see dict.c)
-# performs a lazy rehashing: the more operation you run into an hash table
-# that is rehashing, the more rehashing "steps" are performed, so if the
-# server is idle the rehashing is never complete and some more memory is used
-# by the hash table.
-# 
-# The default is to use this millisecond 10 times every second in order to
-# active rehashing the main dictionaries, freeing memory when possible.
-#
-# If unsure:
-# use "activerehashing no" if you have hard latency requirements and it is
-# not a good thing in your environment that Redis can reply form time to time
-# to queries with 2 milliseconds delay.
-#
-# use "activerehashing yes" if you don't have such hard requirements but
-# want to free memory asap when possible.
-activerehashing yes
-
-# The client output buffer limits can be used to force disconnection of clients
-# that are not reading data from the server fast enough for some reason (a
-# common reason is that a Pub/Sub client can't consume messages as fast as the
-# publisher can produce them).
-#
-# The limit can be set differently for the three different classes of clients:
-#
-# normal -> normal clients
-# slave  -> slave clients and MONITOR clients
-# pubsub -> clients subcribed to at least one pubsub channel or pattern
-#
-# The syntax of every client-output-buffer-limit directive is the following:
-#
-# client-output-buffer-limit <class> <hard limit> <soft limit> <soft seconds>
-#
-# A client is immediately disconnected once the hard limit is reached, or if
-# the soft limit is reached and remains reached for the specified number of
-# seconds (continuously).
-# So for instance if the hard limit is 32 megabytes and the soft limit is
-# 16 megabytes / 10 seconds, the client will get disconnected immediately
-# if the size of the output buffers reach 32 megabytes, but will also get
-# disconnected if the client reaches 16 megabytes and continuously overcomes
-# the limit for 10 seconds.
-#
-# By default normal clients are not limited because they don't receive data
-# without asking (in a push way), but just after a request, so only
-# asynchronous clients may create a scenario where data is requested faster
-# than it can read.
-#
-# Instead there is a default limit for pubsub and slave clients, since
-# subscribers and slaves receive data in a push fashion.
-#
-# Both the hard or the soft limit can be disabled by setting them to zero.
-client-output-buffer-limit normal 0 0 0
-client-output-buffer-limit slave 256mb 64mb 60
-client-output-buffer-limit pubsub 32mb 8mb 60
-
-# Redis calls an internal function to perform many background tasks, like
-# closing connections of clients in timeot, purging expired keys that are
-# never requested, and so forth.
-#
-# Not all tasks are performed with the same frequency, but Redis checks for
-# tasks to perform accordingly to the specified "hz" value.
-#
-# By default "hz" is set to 10. Raising the value will use more CPU when
-# Redis is idle, but at the same time will make Redis more responsive when
-# there are many keys expiring at the same time, and timeouts may be
-# handled with more precision.
-#
-# The range is between 1 and 500, however a value over 100 is usually not
-# a good idea. Most users should use the default of 10 and raise this up to
-# 100 only in environments where very low latency is required.
-hz 10
-
-# When a child rewrites the AOF file, if the following option is enabled
-# the file will be fsync-ed every 32 MB of data generated. This is useful
-# in order to commit the file to the disk more incrementally and avoid
-# big latency spikes.
-aof-rewrite-incremental-fsync yes
-
-################################## INCLUDES ###################################
-
-# Include one or more other config files here.  This is useful if you
-# have a standard template that goes to all Redis server but also need
-# to customize a few per-server settings.  Include files can include
-# other files, so use this wisely.
-#
-# include /path/to/local.conf
-# include /path/to/other.conf
@@ -0,0 +1,695 @@
+# Redis configuration file example
+
+# Note on units: when memory size is needed, it is possible to specify
+# it in the usual form of 1k 5GB 4M and so forth:
+#
+# 1k => 1000 bytes
+# 1kb => 1024 bytes
+# 1m => 1000000 bytes
+# 1mb => 1024*1024 bytes
+# 1g => 1000000000 bytes
+# 1gb => 1024*1024*1024 bytes
+#
+# units are case insensitive so 1GB 1Gb 1gB are all the same.
+
+# By default Redis does not run as a daemon. Use 'yes' if you need it.
+# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
+daemonize no
+
+# When running daemonized, Redis writes a pid file in /var/run/redis.pid by
+# default. You can specify a custom pid file location here.
+pidfile /var/run/redis.pid
+
+# Accept connections on the specified port, default is 6379.
+# If port 0 is specified Redis will not listen on a TCP socket.
+port 6379
+
+# By default Redis listens for connections from all the network interfaces
+# available on the server. It is possible to listen to just one or multiple
+# interfaces using the "bind" configuration directive, followed by one or
+# more IP addresses.
+#
+# Examples:
+#
+# bind 192.168.1.100 10.0.0.1
+# bind 127.0.0.1
+
+# Specify the path for the unix socket that will be used to listen for
+# incoming connections. There is no default, so Redis will not listen
+# on a unix socket when not specified.
+#
+# unixsocket /tmp/redis.sock
+# unixsocketperm 755
+
+# Close the connection after a client is idle for N seconds (0 to disable)
+timeout 0
+
+# TCP keepalive.
+#
+# If non-zero, use SO_KEEPALIVE to send TCP ACKs to clients in absence
+# of communication. This is useful for two reasons:
+#
+# 1) Detect dead peers.
+# 2) Take the connection alive from the point of view of network
+#    equipment in the middle.
+#
+# On Linux, the specified value (in seconds) is the period used to send ACKs.
+# Note that to close the connection the double of the time is needed.
+# On other kernels the period depends on the kernel configuration.
+#
+# A reasonable value for this option is 60 seconds.
+tcp-keepalive 0
+
+# Specify the server verbosity level.
+# This can be one of:
+# debug (a lot of information, useful for development/testing)
+# verbose (many rarely useful info, but not a mess like the debug level)
+# notice (moderately verbose, what you want in production probably)
+# warning (only very important / critical messages are logged)
+loglevel notice
+
+# Specify the log file name. Also the emptry string can be used to force
+# Redis to log on the standard output. Note that if you use standard
+# output for logging but daemonize, logs will be sent to /dev/null
+logfile ""
+
+# To enable logging to the system logger, just set 'syslog-enabled' to yes,
+# and optionally update the other syslog parameters to suit your needs.
+# syslog-enabled no
+
+# Specify the syslog identity.
+# syslog-ident redis
+
+# Specify the syslog facility. Must be USER or between LOCAL0-LOCAL7.
+# syslog-facility local0
+
+# Set the number of databases. The default database is DB 0, you can select
+# a different one on a per-connection basis using SELECT <dbid> where
+# dbid is a number between 0 and 'databases'-1
+databases 16
+
+################################ SNAPSHOTTING  #################################
+#
+# Save the DB on disk:
+#
+#   save <seconds> <changes>
+#
+#   Will save the DB if both the given number of seconds and the given
+#   number of write operations against the DB occurred.
+#
+#   In the example below the behaviour will be to save:
+#   after 900 sec (15 min) if at least 1 key changed
+#   after 300 sec (5 min) if at least 10 keys changed
+#   after 60 sec if at least 10000 keys changed
+#
+#   Note: you can disable saving at all commenting all the "save" lines.
+#
+#   It is also possible to remove all the previously configured save
+#   points by adding a save directive with a single empty string argument
+#   like in the following example:
+#
+#   save ""
+
+save 900 1
+save 300 10
+save 60 10000
+
+# By default Redis will stop accepting writes if RDB snapshots are enabled
+# (at least one save point) and the latest background save failed.
+# This will make the user aware (in an hard way) that data is not persisting
+# on disk properly, otherwise chances are that no one will notice and some
+# distater will happen.
+#
+# If the background saving process will start working again Redis will
+# automatically allow writes again.
+#
+# However if you have setup your proper monitoring of the Redis server
+# and persistence, you may want to disable this feature so that Redis will
+# continue to work as usually even if there are problems with disk,
+# permissions, and so forth.
+stop-writes-on-bgsave-error yes
+
+# Compress string objects using LZF when dump .rdb databases?
+# For default that's set to 'yes' as it's almost always a win.
+# If you want to save some CPU in the saving child set it to 'no' but
+# the dataset will likely be bigger if you have compressible values or keys.
+rdbcompression yes
+
+# Since version 5 of RDB a CRC64 checksum is placed at the end of the file.
+# This makes the format more resistant to corruption but there is a performance
+# hit to pay (around 10%) when saving and loading RDB files, so you can disable it
+# for maximum performances.
+#
+# RDB files created with checksum disabled have a checksum of zero that will
+# tell the loading code to skip the check.
+rdbchecksum yes
+
+# The filename where to dump the DB
+dbfilename dump.rdb
+
+# The working directory.
+#
+# The DB will be written inside this directory, with the filename specified
+# above using the 'dbfilename' configuration directive.
+# 
+# The Append Only File will also be created inside this directory.
+# 
+# Note that you must specify a directory here, not a file name.
+dir ./
+
+################################# REPLICATION #################################
+
+# Master-Slave replication. Use slaveof to make a Redis instance a copy of
+# another Redis server. Note that the configuration is local to the slave
+# so for example it is possible to configure the slave to save the DB with a
+# different interval, or to listen to another port, and so on.
+#
+# slaveof <masterip> <masterport>
+
+# If the master is password protected (using the "requirepass" configuration
+# directive below) it is possible to tell the slave to authenticate before
+# starting the replication synchronization process, otherwise the master will
+# refuse the slave request.
+#
+# masterauth <master-password>
+
+# When a slave loses its connection with the master, or when the replication
+# is still in progress, the slave can act in two different ways:
+#
+# 1) if slave-serve-stale-data is set to 'yes' (the default) the slave will
+#    still reply to client requests, possibly with out of date data, or the
+#    data set may just be empty if this is the first synchronization.
+#
+# 2) if slave-serve-stale-data is set to 'no' the slave will reply with
+#    an error "SYNC with master in progress" to all the kind of commands
+#    but to INFO and SLAVEOF.
+#
+slave-serve-stale-data yes
+
+# You can configure a slave instance to accept writes or not. Writing against
+# a slave instance may be useful to store some ephemeral data (because data
+# written on a slave will be easily deleted after resync with the master) but
+# may also cause problems if clients are writing to it because of a
+# misconfiguration.
+#
+# Since Redis 2.6 by default slaves are read-only.
+#
+# Note: read only slaves are not designed to be exposed to untrusted clients
+# on the internet. It's just a protection layer against misuse of the instance.
+# Still a read only slave exports by default all the administrative commands
+# such as CONFIG, DEBUG, and so forth. To a limited extend you can improve
+# security of read only slaves using 'rename-command' to shadow all the
+# administrative / dangerous commands.
+slave-read-only yes
+
+# Slaves send PINGs to server in a predefined interval. It's possible to change
+# this interval with the repl_ping_slave_period option. The default value is 10
+# seconds.
+#
+# repl-ping-slave-period 10
+
+# The following option sets the replication timeout for:
+#
+# 1) Bulk transfer I/O during SYNC, from the point of view of slave.
+# 2) Master timeout from the point of view of slaves (data, pings).
+# 3) Slave timeout from the point of view of masters (REPLCONF ACK pings).
+#
+# It is important to make sure that this value is greater than the value
+# specified for repl-ping-slave-period otherwise a timeout will be detected
+# every time there is low traffic between the master and the slave.
+#
+# repl-timeout 60
+
+# Disable TCP_NODELAY on the slave socket after SYNC?
+#
+# If you select "yes" Redis will use a smaller number of TCP packets and
+# less bandwidth to send data to slaves. But this can add a delay for
+# the data to appear on the slave side, up to 40 milliseconds with
+# Linux kernels using a default configuration.
+#
+# If you select "no" the delay for data to appear on the slave side will
+# be reduced but more bandwidth will be used for replication.
+#
+# By default we optimize for low latency, but in very high traffic conditions
+# or when the master and slaves are many hops away, turning this to "yes" may
+# be a good idea.
+repl-disable-tcp-nodelay no
+
+# Set the replication backlog size. The backlog is a buffer that accumulates
+# slave data when slaves are disconnected for some time, so that when a slave
+# wants to reconnect again, often a full resync is not needed, but a partial
+# resync is enough, just passing the portion of data the slave missed while
+# disconnected.
+#
+# The biggest the replication backlog, the longer the time the slave can be
+# disconnected and later be able to perform a partial resynchronization.
+#
+# The backlog is only allocated once there is at least a slave connected.
+#
+# repl-backlog-size 1mb
+
+# After a master has no longer connected slaves for some time, the backlog
+# will be freed. The following option configures the amount of seconds that
+# need to elapse, starting from the time the last slave disconnected, for
+# the backlog buffer to be freed.
+#
+# A value of 0 means to never release the backlog.
+#
+# repl-backlog-ttl 3600
+
+# The slave priority is an integer number published by Redis in the INFO output.
+# It is used by Redis Sentinel in order to select a slave to promote into a
+# master if the master is no longer working correctly.
+#
+# A slave with a low priority number is considered better for promotion, so
+# for instance if there are three slaves with priority 10, 100, 25 Sentinel will
+# pick the one wtih priority 10, that is the lowest.
+#
+# However a special priority of 0 marks the slave as not able to perform the
+# role of master, so a slave with priority of 0 will never be selected by
+# Redis Sentinel for promotion.
+#
+# By default the priority is 100.
+slave-priority 100
+
+# It is possible for a master to stop accepting writes if there are less than
+# N slaves connected, having a lag less or equal than M seconds.
+#
+# The N slaves need to be in "online" state.
+#
+# The lag in seconds, that must be <= the specified value, is calculated from
+# the last ping received from the slave, that is usually sent every second.
+#
+# This option does not GUARANTEES that N replicas will accept the write, but
+# will limit the window of exposure for lost writes in case not enough slaves
+# are available, to the specified number of seconds.
+#
+# For example to require at least 3 slaves with a lag <= 10 seconds use:
+#
+# min-slaves-to-write 3
+# min-slaves-max-lag 10
+#
+# Setting one or the other to 0 disables the feature.
+#
+# By default min-slaves-to-write is set to 0 (feature disabled) and
+# min-slaves-max-lag is set to 10.
+
+################################## SECURITY ###################################
+
+# Require clients to issue AUTH <PASSWORD> before processing any other
+# commands.  This might be useful in environments in which you do not trust
+# others with access to the host running redis-server.
+#
+# This should stay commented out for backward compatibility and because most
+# people do not need auth (e.g. they run their own servers).
+# 
+# Warning: since Redis is pretty fast an outside user can try up to
+# 150k passwords per second against a good box. This means that you should
+# use a very strong password otherwise it will be very easy to break.
+#
+# requirepass foobared
+
+# Command renaming.
+#
+# It is possible to change the name of dangerous commands in a shared
+# environment. For instance the CONFIG command may be renamed into something
+# hard to guess so that it will still be available for internal-use tools
+# but not available for general clients.
+#
+# Example:
+#
+# rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52
+#
+# It is also possible to completely kill a command by renaming it into
+# an empty string:
+#
+# rename-command CONFIG ""
+#
+# Please note that changing the name of commands that are logged into the
+# AOF file or transmitted to slaves may cause problems.
+
+################################### LIMITS ####################################
+
+# Set the max number of connected clients at the same time. By default
+# this limit is set to 10000 clients, however if the Redis server is not
+# able to configure the process file limit to allow for the specified limit
+# the max number of allowed clients is set to the current file limit
+# minus 32 (as Redis reserves a few file descriptors for internal uses).
+#
+# Once the limit is reached Redis will close all the new connections sending
+# an error 'max number of clients reached'.
+#
+# maxclients 10000
+
+# Don't use more memory than the specified amount of bytes.
+# When the memory limit is reached Redis will try to remove keys
+# accordingly to the eviction policy selected (see maxmemmory-policy).
+#
+# If Redis can't remove keys according to the policy, or if the policy is
+# set to 'noeviction', Redis will start to reply with errors to commands
+# that would use more memory, like SET, LPUSH, and so on, and will continue
+# to reply to read-only commands like GET.
+#
+# This option is usually useful when using Redis as an LRU cache, or to set
+# an hard memory limit for an instance (using the 'noeviction' policy).
+#
+# WARNING: If you have slaves attached to an instance with maxmemory on,
+# the size of the output buffers needed to feed the slaves are subtracted
+# from the used memory count, so that network problems / resyncs will
+# not trigger a loop where keys are evicted, and in turn the output
+# buffer of slaves is full with DELs of keys evicted triggering the deletion
+# of more keys, and so forth until the database is completely emptied.
+#
+# In short... if you have slaves attached it is suggested that you set a lower
+# limit for maxmemory so that there is some free RAM on the system for slave
+# output buffers (but this is not needed if the policy is 'noeviction').
+#
+# maxmemory <bytes>
+
+# MAXMEMORY POLICY: how Redis will select what to remove when maxmemory
+# is reached. You can select among five behaviors:
+# 
+# volatile-lru -> remove the key with an expire set using an LRU algorithm
+# allkeys-lru -> remove any key accordingly to the LRU algorithm
+# volatile-random -> remove a random key with an expire set
+# allkeys-random -> remove a random key, any key
+# volatile-ttl -> remove the key with the nearest expire time (minor TTL)
+# noeviction -> don't expire at all, just return an error on write operations
+# 
+# Note: with any of the above policies, Redis will return an error on write
+#       operations, when there are not suitable keys for eviction.
+#
+#       At the date of writing this commands are: set setnx setex append
+#       incr decr rpush lpush rpushx lpushx linsert lset rpoplpush sadd
+#       sinter sinterstore sunion sunionstore sdiff sdiffstore zadd zincrby
+#       zunionstore zinterstore hset hsetnx hmset hincrby incrby decrby
+#       getset mset msetnx exec sort
+#
+# The default is:
+#
+# maxmemory-policy volatile-lru
+
+# LRU and minimal TTL algorithms are not precise algorithms but approximated
+# algorithms (in order to save memory), so you can select as well the sample
+# size to check. For instance for default Redis will check three keys and
+# pick the one that was used less recently, you can change the sample size
+# using the following configuration directive.
+#
+# maxmemory-samples 3
+
+############################## APPEND ONLY MODE ###############################
+
+# By default Redis asynchronously dumps the dataset on disk. This mode is
+# good enough in many applications, but an issue with the Redis process or
+# a power outage may result into a few minutes of writes lost (depending on
+# the configured save points).
+#
+# The Append Only File is an alternative persistence mode that provides
+# much better durability. For instance using the default data fsync policy
+# (see later in the config file) Redis can lose just one second of writes in a
+# dramatic event like a server power outage, or a single write if something
+# wrong with the Redis process itself happens, but the operating system is
+# still running correctly.
+#
+# AOF and RDB persistence can be enabled at the same time without problems.
+# If the AOF is enabled on startup Redis will load the AOF, that is the file
+# with the better durability guarantees.
+#
+# Please check http://redis.io/topics/persistence for more information.
+
+appendonly no
+
+# The name of the append only file (default: "appendonly.aof")
+# appendfilename appendonly.aof
+
+# The fsync() call tells the Operating System to actually write data on disk
+# instead to wait for more data in the output buffer. Some OS will really flush 
+# data on disk, some other OS will just try to do it ASAP.
+#
+# Redis supports three different modes:
+#
+# no: don't fsync, just let the OS flush the data when it wants. Faster.
+# always: fsync after every write to the append only log . Slow, Safest.
+# everysec: fsync only one time every second. Compromise.
+#
+# The default is "everysec", as that's usually the right compromise between
+# speed and data safety. It's up to you to understand if you can relax this to
+# "no" that will let the operating system flush the output buffer when
+# it wants, for better performances (but if you can live with the idea of
+# some data loss consider the default persistence mode that's snapshotting),
+# or on the contrary, use "always" that's very slow but a bit safer than
+# everysec.
+#
+# More details please check the following article:
+# http://antirez.com/post/redis-persistence-demystified.html
+#
+# If unsure, use "everysec".
+
+# appendfsync always
+appendfsync everysec
+# appendfsync no
+
+# When the AOF fsync policy is set to always or everysec, and a background
+# saving process (a background save or AOF log background rewriting) is
+# performing a lot of I/O against the disk, in some Linux configurations
+# Redis may block too long on the fsync() call. Note that there is no fix for
+# this currently, as even performing fsync in a different thread will block
+# our synchronous write(2) call.
+#
+# In order to mitigate this problem it's possible to use the following option
+# that will prevent fsync() from being called in the main process while a
+# BGSAVE or BGREWRITEAOF is in progress.
+#
+# This means that while another child is saving, the durability of Redis is
+# the same as "appendfsync none". In practical terms, this means that it is
+# possible to lose up to 30 seconds of log in the worst scenario (with the
+# default Linux settings).
+# 
+# If you have latency problems turn this to "yes". Otherwise leave it as
+# "no" that is the safest pick from the point of view of durability.
+no-appendfsync-on-rewrite no
+
+# Automatic rewrite of the append only file.
+# Redis is able to automatically rewrite the log file implicitly calling
+# BGREWRITEAOF when the AOF log size grows by the specified percentage.
+# 
+# This is how it works: Redis remembers the size of the AOF file after the
+# latest rewrite (if no rewrite has happened since the restart, the size of
+# the AOF at startup is used).
+#
+# This base size is compared to the current size. If the current size is
+# bigger than the specified percentage, the rewrite is triggered. Also
+# you need to specify a minimal size for the AOF file to be rewritten, this
+# is useful to avoid rewriting the AOF file even if the percentage increase
+# is reached but it is still pretty small.
+#
+# Specify a percentage of zero in order to disable the automatic AOF
+# rewrite feature.
+
+auto-aof-rewrite-percentage 100
+auto-aof-rewrite-min-size 64mb
+
+################################ LUA SCRIPTING  ###############################
+
+# Max execution time of a Lua script in milliseconds.
+#
+# If the maximum execution time is reached Redis will log that a script is
+# still in execution after the maximum allowed time and will start to
+# reply to queries with an error.
+#
+# When a long running script exceed the maximum execution time only the
+# SCRIPT KILL and SHUTDOWN NOSAVE commands are available. The first can be
+# used to stop a script that did not yet called write commands. The second
+# is the only way to shut down the server in the case a write commands was
+# already issue by the script but the user don't want to wait for the natural
+# termination of the script.
+#
+# Set it to 0 or a negative value for unlimited execution without warnings.
+lua-time-limit 5000
+
+################################## SLOW LOG ###################################
+
+# The Redis Slow Log is a system to log queries that exceeded a specified
+# execution time. The execution time does not include the I/O operations
+# like talking with the client, sending the reply and so forth,
+# but just the time needed to actually execute the command (this is the only
+# stage of command execution where the thread is blocked and can not serve
+# other requests in the meantime).
+# 
+# You can configure the slow log with two parameters: one tells Redis
+# what is the execution time, in microseconds, to exceed in order for the
+# command to get logged, and the other parameter is the length of the
+# slow log. When a new command is logged the oldest one is removed from the
+# queue of logged commands.
+
+# The following time is expressed in microseconds, so 1000000 is equivalent
+# to one second. Note that a negative number disables the slow log, while
+# a value of zero forces the logging of every command.
+slowlog-log-slower-than 10000
+
+# There is no limit to this length. Just be aware that it will consume memory.
+# You can reclaim memory used by the slow log with SLOWLOG RESET.
+slowlog-max-len 128
+
+############################# Event notification ##############################
+
+# Redis can notify Pub/Sub clients about events happening in the key space.
+# This feature is documented at http://redis.io/topics/keyspace-events
+# 
+# For instance if keyspace events notification is enabled, and a client
+# performs a DEL operation on key "foo" stored in the Database 0, two
+# messages will be published via Pub/Sub:
+#
+# PUBLISH __keyspace@0__:foo del
+# PUBLISH __keyevent@0__:del foo
+#
+# It is possible to select the events that Redis will notify among a set
+# of classes. Every class is identified by a single character:
+#
+#  K     Keyspace events, published with __keyspace@<db>__ prefix.
+#  E     Keyevent events, published with __keyevent@<db>__ prefix.
+#  g     Generic commands (non-type specific) like DEL, EXPIRE, RENAME, ...
+#  $     String commands
+#  l     List commands
+#  s     Set commands
+#  h     Hash commands
+#  z     Sorted set commands
+#  x     Expired events (events generated every time a key expires)
+#  e     Evicted events (events generated when a key is evicted for maxmemory)
+#  A     Alias for g$lshzxe, so that the "AKE" string means all the events.
+#
+#  The "notify-keyspace-events" takes as argument a string that is composed
+#  by zero or multiple characters. The empty string means that notifications
+#  are disabled at all.
+#
+#  Example: to enable list and generic events, from the point of view of the
+#           event name, use:
+#
+#  notify-keyspace-events Elg
+#
+#  Example 2: to get the stream of the expired keys subscribing to channel
+#             name __keyevent@0__:expired use:
+#
+#  notify-keyspace-events Ex
+#
+#  By default all notifications are disabled because most users don't need
+#  this feature and the feature has some overhead. Note that if you don't
+#  specify at least one of K or E, no events will be delivered.
+notify-keyspace-events ""
+
+############################### ADVANCED CONFIG ###############################
+
+# Hashes are encoded using a memory efficient data structure when they have a
+# small number of entries, and the biggest entry does not exceed a given
+# threshold. These thresholds can be configured using the following directives.
+hash-max-ziplist-entries 512
+hash-max-ziplist-value 64
+
+# Similarly to hashes, small lists are also encoded in a special way in order
+# to save a lot of space. The special representation is only used when
+# you are under the following limits:
+list-max-ziplist-entries 512
+list-max-ziplist-value 64
+
+# Sets have a special encoding in just one case: when a set is composed
+# of just strings that happens to be integers in radix 10 in the range
+# of 64 bit signed integers.
+# The following configuration setting sets the limit in the size of the
+# set in order to use this special memory saving encoding.
+set-max-intset-entries 512
+
+# Similarly to hashes and lists, sorted sets are also specially encoded in
+# order to save a lot of space. This encoding is only used when the length and
+# elements of a sorted set are below the following limits:
+zset-max-ziplist-entries 128
+zset-max-ziplist-value 64
+
+# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
+# order to help rehashing the main Redis hash table (the one mapping top-level
+# keys to values). The hash table implementation Redis uses (see dict.c)
+# performs a lazy rehashing: the more operation you run into an hash table
+# that is rehashing, the more rehashing "steps" are performed, so if the
+# server is idle the rehashing is never complete and some more memory is used
+# by the hash table.
+# 
+# The default is to use this millisecond 10 times every second in order to
+# active rehashing the main dictionaries, freeing memory when possible.
+#
+# If unsure:
+# use "activerehashing no" if you have hard latency requirements and it is
+# not a good thing in your environment that Redis can reply form time to time
+# to queries with 2 milliseconds delay.
+#
+# use "activerehashing yes" if you don't have such hard requirements but
+# want to free memory asap when possible.
+activerehashing yes
+
+# The client output buffer limits can be used to force disconnection of clients
+# that are not reading data from the server fast enough for some reason (a
+# common reason is that a Pub/Sub client can't consume messages as fast as the
+# publisher can produce them).
+#
+# The limit can be set differently for the three different classes of clients:
+#
+# normal -> normal clients
+# slave  -> slave clients and MONITOR clients
+# pubsub -> clients subcribed to at least one pubsub channel or pattern
+#
+# The syntax of every client-output-buffer-limit directive is the following:
+#
+# client-output-buffer-limit <class> <hard limit> <soft limit> <soft seconds>
+#
+# A client is immediately disconnected once the hard limit is reached, or if
+# the soft limit is reached and remains reached for the specified number of
+# seconds (continuously).
+# So for instance if the hard limit is 32 megabytes and the soft limit is
+# 16 megabytes / 10 seconds, the client will get disconnected immediately
+# if the size of the output buffers reach 32 megabytes, but will also get
+# disconnected if the client reaches 16 megabytes and continuously overcomes
+# the limit for 10 seconds.
+#
+# By default normal clients are not limited because they don't receive data
+# without asking (in a push way), but just after a request, so only
+# asynchronous clients may create a scenario where data is requested faster
+# than it can read.
+#
+# Instead there is a default limit for pubsub and slave clients, since
+# subscribers and slaves receive data in a push fashion.
+#
+# Both the hard or the soft limit can be disabled by setting them to zero.
+client-output-buffer-limit normal 0 0 0
+client-output-buffer-limit slave 256mb 64mb 60
+client-output-buffer-limit pubsub 32mb 8mb 60
+
+# Redis calls an internal function to perform many background tasks, like
+# closing connections of clients in timeot, purging expired keys that are
+# never requested, and so forth.
+#
+# Not all tasks are performed with the same frequency, but Redis checks for
+# tasks to perform accordingly to the specified "hz" value.
+#
+# By default "hz" is set to 10. Raising the value will use more CPU when
+# Redis is idle, but at the same time will make Redis more responsive when
+# there are many keys expiring at the same time, and timeouts may be
+# handled with more precision.
+#
+# The range is between 1 and 500, however a value over 100 is usually not
+# a good idea. Most users should use the default of 10 and raise this up to
+# 100 only in environments where very low latency is required.
+hz 10
+
+# When a child rewrites the AOF file, if the following option is enabled
+# the file will be fsync-ed every 32 MB of data generated. This is useful
+# in order to commit the file to the disk more incrementally and avoid
+# big latency spikes.
+aof-rewrite-incremental-fsync yes
+
+################################## INCLUDES ###################################
+
+# Include one or more other config files here.  This is useful if you
+# have a standard template that goes to all Redis server but also need
+# to customize a few per-server settings.  Include files can include
+# other files, so use this wisely.
+#
+# include /path/to/local.conf
+# include /path/to/other.conf