X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/b0553789719a3f47531655dab13f5def5ce35403..db6cea11c4164423c318ec2a4ad1c42a273feaaf:/redis.conf?ds=sidebyside diff --git a/redis.conf b/redis.conf index c1a1f7f1..e7a01eec 100644 --- a/redis.conf +++ b/redis.conf @@ -1,36 +1,66 @@ # Redis configuration file example +# Note on units: when memory size is needed, it is possible to specifiy +# 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 run as a daemon, Redis write a pid file in /var/run/redis.pid by default. -# You can specify a custom pid file location here. +# 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 +# Accept connections on the specified port, default is 6379. +# If port 0 is specified Redis will not listen on a TCP socket. port 6379 # If you want you can bind a single interface, if the bind option is not -# specified all the interfaces will listen for connections. +# specified all the interfaces will listen for incoming connections. # # 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 + # Close the connection after a client is idle for N seconds (0 to disable) timeout 300 # Set server verbosity to 'debug' # it 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 debug +loglevel verbose # Specify the log file name. Also 'stdout' can be used to force -# the demon to log on the standard output. Note that if you use standard +# 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 stdout +# 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 where # dbid is a number between 0 and 'databases'-1 @@ -49,6 +79,9 @@ databases 16 # 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. + save 900 1 save 300 10 save 60 10000 @@ -62,8 +95,14 @@ rdbcompression yes # The filename where to dump the DB dbfilename dump.rdb -# For default save/load DB in/from the working directory -# Note that you must specify a directory not a file name. +# The working directory. +# +# The DB will be written inside this directory, with the filename specified +# above using the 'dbfilename' configuration directive. +# +# Also the Append Only File will be created inside this directory. +# +# Note that you must specify a directory here, not a file name. dir ./ ################################# REPLICATION ################################# @@ -82,6 +121,19 @@ dir ./ # # masterauth +# When a slave lost the 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 data 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 + ################################## SECURITY ################################### # Require clients to issue AUTH before processing any other @@ -90,14 +142,34 @@ dir ./ # # 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 possilbe to change the name of dangerous commands in a shared +# environment. For instance the CONFIG command may be renamed into something +# of hard to guess so that it will be still available for internal-use +# tools but not available for general clients. +# +# Example: +# +# rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52 +# +# It is also possilbe to completely kill a command renaming it into +# an empty string: +# +# rename-command CONFIG "" + ################################### LIMITS #################################### # Set the max number of connected clients at the same time. By default there # is no limit, and it's up to the number of file descriptors the Redis process -# is able to open. The special value '0' means no limts. +# is able to open. The special value '0' means no limits. # Once the limit is reached Redis will close all the new connections sending # an error 'max number of clients reached'. # @@ -122,6 +194,37 @@ dir ./ # # maxmemory +# MAXMEMORY POLICY: how Redis will select what to remove when maxmemory +# is reached? You can select among five behavior: +# +# 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 all the kind of 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. If you can live @@ -129,7 +232,7 @@ dir ./ # happens this is the preferred way to run Redis. If instead you care a lot # about your data and don't want to that a single record can get lost you should # enable the append only mode: when this mode is enabled Redis will append -# every write operation received in the file appendonly.log. This file will +# every write operation received in the file appendonly.aof. This file will # be read on startup in order to rebuild the full dataset in memory. # # Note that you can have both the async dumps and the append only file if you @@ -137,13 +240,14 @@ dir ./ # Still if append only mode is enabled Redis will load the data from the # log file at startup ignoring the dump.rdb file. # -# The name of the append only file is "appendonly.log" -# # IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append # log file in background when it gets too big. 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. @@ -154,36 +258,120 @@ appendonly no # always: fsync after every write to the append only log . Slow, Safest. # everysec: fsync only if one second passed since the last fsync. Compromise. # -# The default is "always" that's the safer of the options. It's up to you to -# understand if you can relax this to "everysec" that will fsync every second -# or to "no" that will let the operating system flush the output buffer when -# it want, for better performances (but if you can live with the idea of -# some data loss consider the default persistence mode that's snapshotting). +# The default is "everysec" 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 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. +# +# If unsure, use "everysec". -appendfsync always -# appendfsync 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", that in pratical terms means that it is +# possible to lost 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 + +#################################### DISK STORE ############################### + +# When disk store is active Redis works as an on-disk database, where memory +# is only used as a object cache. +# +# This mode is good for datasets that are bigger than memory, and in general +# when you want to trade speed for: +# +# - less memory used +# - immediate server restart +# - per key durability, without need for backgrond savig +# +# On the other hand, with disk store enabled MULTI/EXEC are no longer +# transactional from the point of view of the persistence on disk, that is, +# Redis transactions will still guarantee that commands are either processed +# all or nothing, but there is no guarantee that all the keys are flushed +# on disk in an atomic way. +# +# Of course with disk store enabled Redis is not as fast as it is when +# working with just the memory back end. + +diskstore-enabled no +diskstore-path redis.ds +cache-max-memory 0 +cache-flush-delay 0 + ############################### ADVANCED CONFIG ############################### -# Glue small output buffers together in order to send small replies in a -# single TCP packet. Uses a bit more CPU but most of the times it is a win -# in terms of number of queries per second. Use 'yes' if unsure. -glueoutputbuf yes - -# Use object sharing. Can save a lot of memory if you have many common -# string in your dataset, but performs lookups against the shared objects -# pool so it uses more CPU and can be a bit slower. Usually it's a good -# idea. -# -# When object sharing is enabled (shareobjects yes) you can use -# shareobjectspoolsize to control the size of the pool used in order to try -# object sharing. A bigger pool size will lead to better sharing capabilities. -# In general you want this value to be at least the double of the number of -# very common strings you have in your dataset. -# -# WARNING: object sharing is experimental, don't enable this feature -# in production before of Redis 1.0-stable. Still please try this feature in -# your development environment so that we can test it better. -shareobjects no -shareobjectspoolsize 1024 +# Hashes are encoded in a special way (much more memory efficient) when they +# have at max a given numer of elements, and the biggest element does not +# exceed a given threshold. You can configure this limits with the following +# configuration directives. +hash-max-zipmap-entries 512 +hash-max-zipmap-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 rhashing, 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 + +################################## 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