|
|
# 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.
|
|
|
|
|
|
# Redis默认不是以守护进程的方式运行，可以通过该配置项修改，使用yes启用守护进程
|
|
|
# 启用守护进程后，Redis会把pid写到一个pidfile中，在/var/run/redis.pid
|
|
|
daemonize no
|
|
|
|
|
|
# 当Redis以守护进程方式运行时，Redis默认会把pid写入/var/run/redis.pid文件，可以通过pidfile指定
|
|
|
pidfile /var/run/redis.pid
|
|
|
|
|
|
# 指定Redis监听端口，默认端口为6379
|
|
|
# 如果指定0端口，表示Redis不监听TCP连接
|
|
|
port 6379
|
|
|
|
|
|
# 绑定的主机地址
|
|
|
# 你可以绑定单一接口，如果没有绑定，所有接口都会监听到来的连接
|
|
|
# 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
|
|
|
|
|
|
# 当客户端闲置多长时间后关闭连接，如果指定为0，表示关闭该功能
|
|
|
timeout 0
|
|
|
|
|
|
# 指定日志记录级别，Redis总共支持四个级别：debug、verbose、notice、warning，默认为verbose
|
|
|
# debug (很多信息, 对开发／测试比较有用)
|
|
|
# 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 verbose
|
|
|
|
|
|
# 日志记录方式，默认为标准输出，如果配置为redis为守护进程方式运行，而这里又配置为标准输出，则日志将会发送给/dev/null
|
|
|
logfile /logs/redis.log
|
|
|
|
|
|
# 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
|
|
|
|
|
|
# 设置数据库的数量，默认数据库为0，可以使用select <dbid>命令在连接上指定数据库id
|
|
|
# dbid是从0到‘databases’-1的数目
|
|
|
databases 16
|
|
|
|
|
|
################################ SNAPSHOTTING #################################
|
|
|
# 指定在多长时间内，有多少次更新操作，就将数据同步到数据文件，可以多个条件配合
|
|
|
# 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.
|
|
|
#
|
|
|
# 满足以下条件将会同步数据:
|
|
|
# 900秒（15分钟）内有1个更改
|
|
|
# 300秒（5分钟）内有10个更改
|
|
|
# 60秒内有10000个更改
|
|
|
# Note: 可以把所有“save”行注释掉，这样就取消同步操作了
|
|
|
|
|
|
save 900 1
|
|
|
save 300 10
|
|
|
save 60 10000
|
|
|
|
|
|
# 指定存储至本地数据库时是否压缩数据，默认为yes，Redis采用LZF压缩，如果为了节省CPU时间，可以关闭该选项，但会导致数据库文件变的巨大
|
|
|
rdbcompression yes
|
|
|
|
|
|
# 指定本地数据库文件名，默认值为dump.rdb
|
|
|
dbfilename dump.rdb
|
|
|
|
|
|
# 工作目录.
|
|
|
# 指定本地数据库存放目录，文件名由上一个dbfilename配置项指定
|
|
|
#
|
|
|
# Also the Append Only File will be created inside this directory.
|
|
|
#
|
|
|
# 注意，这里只能指定一个目录，不能指定文件名
|
|
|
dir ./
|
|
|
|
|
|
################################# REPLICATION #################################
|
|
|
|
|
|
# 主从复制。使用slaveof从 Redis服务器复制一个Redis实例。注意，该配置仅限于当前slave有效
|
|
|
# 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.
|
|
|
# 设置当本机为slav服务时，设置master服务的ip地址及端口，在Redis启动时，它会自动从master进行数据同步
|
|
|
# slaveof <masterip> <masterport>
|
|
|
|
|
|
|
|
|
# 当master服务设置了密码保护时，slav服务连接master的密码
|
|
|
# 下文的“requirepass”配置项可以指定密码
|
|
|
# masterauth <master-password>
|
|
|
|
|
|
# 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
|
|
|
|
|
|
# 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 a timeout for both Bulk transfer I/O timeout and
|
|
|
# master data or ping response timeout. The default value is 60 seconds.
|
|
|
#
|
|
|
# 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
|
|
|
|
|
|
################################## SECURITY ###################################
|
|
|
|
|
|
# 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.
|
|
|
# 设置Redis连接密码，如果配置了连接密码，客户端在连接Redis时需要通过auth <password>命令提供密码，默认关闭
|
|
|
requirepass 71FE1012A95B4CDA361DE3373BB9C13A
|
|
|
# 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 ####################################
|
|
|
|
|
|
# 设置同一时间最大客户端连接数，默认无限制，Redis可以同时打开的客户端连接数为Redis进程可以打开的最大文件描述符数，
|
|
|
# 如果设置maxclients 0，表示不作限制。当客户端连接数到达限制时，Redis会关闭新的连接并向客户端返回max Number of clients reached错误信息
|
|
|
# maxclients 128
|
|
|
|
|
|
# Don't use more memory than the specified amount of bytes.
|
|
|
# When the memory limit is reached Redis will try to remove keys with an
|
|
|
# EXPIRE set. It will try to start freeing keys that are going to expire
|
|
|
# in little time and preserve keys with a longer time to live.
|
|
|
# Redis will also try to remove objects from free lists if possible.
|
|
|
#
|
|
|
# If all this fails, Redis will start to reply with errors to commands
|
|
|
# that will use more memory, like SET, LPUSH, and so on, and will continue
|
|
|
# to reply to most read-only commands like GET.
|
|
|
#
|
|
|
# WARNING: maxmemory can be a good idea mainly if you want to use Redis as a
|
|
|
# 'state' server or cache, not as a real DB. When Redis is used as a real
|
|
|
# database the memory usage will grow over the weeks, it will be obvious if
|
|
|
# it is going to use too much memory in the long run, and you'll have the time
|
|
|
# to upgrade. With maxmemory after the limit is reached you'll start to get
|
|
|
# errors for write operations, and this may even lead to DB inconsistency.
|
|
|
# 指定Redis最大内存限制，Redis在启动时会把数据加载到内存中，达到最大内存后，Redis会先尝试清除已到期或即将到期的Key，
|
|
|
# 当此方法处理后，仍然到达最大内存设置，将无法再进行写入操作，但仍然可以进行读取操作。
|
|
|
# Redis新的vm机制，会把Key存放内存，Value会存放在swap区
|
|
|
# maxmemory <bytes>
|
|
|
|
|
|
# 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 ###############################
|
|
|
|
|
|
#
|
|
|
# Note that you can have both the async dumps and the append only file if you
|
|
|
# like (you have to comment the "save" statements above to disable the dumps).
|
|
|
# Still if append only mode is enabled Redis will load the data from the
|
|
|
# log file at startup ignoring the dump.rdb file.
|
|
|
# 指定是否在每次更新操作后进行日志记录，Redis在默认情况下是异步的把数据写入磁盘，如果不开启，可能会在断电时导致一段时间内的数据丢失。
|
|
|
# 因为redis本身同步数据文件是按上面save条件来同步的，所以有的数据会在一段时间内只存在于内存中。默认为no
|
|
|
# IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append
|
|
|
# log file in background when it gets too big.
|
|
|
|
|
|
appendonly yes
|
|
|
|
|
|
# 指定更新日志文件名，默认为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.
|
|
|
|
|
|
# 指定更新日志条件，共有3个可选值：
|
|
|
# no:表示等操作系统进行数据缓存同步到磁盘（快）
|
|
|
# always:表示每次更新操作后手动调用fsync()将数据写到磁盘（慢，安全）
|
|
|
# everysec:表示每秒同步一次（折衷，默认值）
|
|
|
|
|
|
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
|
|
|
|
|
|
# Automatic rewrite of the append only file.
|
|
|
# Redis is able to automatically rewrite the log file implicitly calling
|
|
|
# BGREWRITEAOF when the AOF log size will growth by the specified percentage.
|
|
|
#
|
|
|
# This is how it works: Redis remembers the size of the AOF file after the
|
|
|
# latest rewrite (or if no rewrite 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 precentage of zero in order to disable the automatic AOF
|
|
|
# rewrite feature.
|
|
|
|
|
|
auto-aof-rewrite-percentage 100
|
|
|
auto-aof-rewrite-min-size 64mb
|
|
|
|
|
|
################################## 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 1024
|
|
|
|
|
|
################################ VIRTUAL MEMORY ###############################
|
|
|
|
|
|
### WARNING! Virtual Memory is deprecated in Redis 2.4
|
|
|
### The use of Virtual Memory is strongly discouraged.
|
|
|
|
|
|
### WARNING! Virtual Memory is deprecated in Redis 2.4
|
|
|
### The use of Virtual Memory is strongly discouraged.
|
|
|
|
|
|
# Virtual Memory allows Redis to work with datasets bigger than the actual
|
|
|
# amount of RAM needed to hold the whole dataset in memory.
|
|
|
# In order to do so very used keys are taken in memory while the other keys
|
|
|
# are swapped into a swap file, similarly to what operating systems do
|
|
|
# with memory pages.
|
|
|
# 指定是否启用虚拟内存机制，默认值为no，
|
|
|
# VM机制将数据分页存放，由Redis将访问量较少的页即冷数据swap到磁盘上，访问多的页面由磁盘自动换出到内存中
|
|
|
# 把vm-enabled设置为yes，根据需要设置好接下来的三个VM参数，就可以启动VM了
|
|
|
# vm-enabled no
|
|
|
# vm-enabled yes
|
|
|
|
|
|
# This is the path of the Redis swap file. As you can guess, swap files
|
|
|
# can't be shared by different Redis instances, so make sure to use a swap
|
|
|
# file for every redis process you are running. Redis will complain if the
|
|
|
# swap file is already in use.
|
|
|
#
|
|
|
# Redis交换文件最好的存储是SSD（固态硬盘）
|
|
|
# 虚拟内存文件路径，默认值为/tmp/redis.swap，不可多个Redis实例共享
|
|
|
# *** WARNING *** if you are using a shared hosting the default of putting
|
|
|
# the swap file under /tmp is not secure. Create a dir with access granted
|
|
|
# only to Redis user and configure Redis to create the swap file there.
|
|
|
# vm-swap-file /tmp/redis.swap
|
|
|
|
|
|
# With vm-max-memory 0 the system will swap everything it can. Not a good
|
|
|
# default, just specify the max amount of RAM you can in bytes, but it's
|
|
|
# better to leave some margin. For instance specify an amount of RAM
|
|
|
# that's more or less between 60 and 80% of your free RAM.
|
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# 将所有大于vm-max-memory的数据存入虚拟内存，无论vm-max-memory设置多少，所有索引数据都是内存存储的（Redis的索引数据就是keys）
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# 也就是说当vm-max-memory设置为0的时候，其实是所有value都存在于磁盘。默认值为0
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# vm-max-memory 0
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# Redis swap文件分成了很多的page，一个对象可以保存在多个page上面，但一个page上不能被多个对象共享，vm-page-size是要根据存储的数据大小来设定的。
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# 建议如果存储很多小对象，page大小最后设置为32或64bytes；如果存储很大的对象，则可以使用更大的page，如果不确定，就使用默认值
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# vm-page-size 32
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# 设置swap文件中的page数量由于页表（一种表示页面空闲或使用的bitmap）是存放在内存中的，在磁盘上每8个pages将消耗1byte的内存
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# swap空间总容量为 vm-page-size * vm-pages
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#
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# With the default of 32-bytes memory pages and 134217728 pages Redis will
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# use a 4 GB swap file, that will use 16 MB of RAM for the page table.
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#
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# It's better to use the smallest acceptable value for your application,
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# but the default is large in order to work in most conditions.
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# vm-pages 134217728
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# Max number of VM I/O threads running at the same time.
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# This threads are used to read/write data from/to swap file, since they
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# also encode and decode objects from disk to memory or the reverse, a bigger
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# number of threads can help with big objects even if they can't help with
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# I/O itself as the physical device may not be able to couple with many
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# reads/writes operations at the same time.
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# 设置访问swap文件的I/O线程数，最后不要超过机器的核数，如果设置为0，那么所有对swap文件的操作都是串行的，可能会造成比较长时间的延迟，默认值为4
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# vm-max-threads 4
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############################### ADVANCED CONFIG ###############################
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# Hashes are encoded in a special way (much more memory efficient) when they
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# have at max a given numer of elements, and the biggest element does not
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# exceed a given threshold. You can configure this limits with the following
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# configuration directives.
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# 指定在超过一定的数量或者最大的元素超过某一临界值时，采用一种特殊的哈希算法
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# hash-max-zipmap-entries 512
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# hash-max-zipmap-value 64
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# Similarly to hashes, small lists are also encoded in a special way in order
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# to save a lot of space. The special representation is only used when
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# you are under the following limits:
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list-max-ziplist-entries 512
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list-max-ziplist-value 64
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# Sets have a special encoding in just one case: when a set is composed
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# of just strings that happens to be integers in radix 10 in the range
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# of 64 bit signed integers.
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# The following configuration setting sets the limit in the size of the
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# set in order to use this special memory saving encoding.
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set-max-intset-entries 512
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# Similarly to hashes and lists, sorted sets are also specially encoded in
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# order to save a lot of space. This encoding is only used when the length and
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# elements of a sorted set are below the following limits:
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zset-max-ziplist-entries 128
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zset-max-ziplist-value 64
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# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
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# order to help rehashing the main Redis hash table (the one mapping top-level
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# keys to values). The hash table implementation redis uses (see dict.c)
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# performs a lazy rehashing: the more operation you run into an hash table
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# that is rhashing, the more rehashing "steps" are performed, so if the
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# server is idle the rehashing is never complete and some more memory is used
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# by the hash table.
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#
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# The default is to use this millisecond 10 times every second in order to
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# active rehashing the main dictionaries, freeing memory when possible.
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#
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# If unsure:
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# use "activerehashing no" if you have hard latency requirements and it is
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# not a good thing in your environment that Redis can reply form time to time
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# to queries with 2 milliseconds delay.
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# 指定是否激活重置哈希，默认为开启
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activerehashing yes
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################################## INCLUDES ###################################
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# 指定包含其他的配置文件，可以在同一主机上多个Redis实例之间使用同一份配置文件，而同时各实例又拥有自己的特定配置文件
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# include /path/to/local.conf
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# include /path/to/other.conf
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