windows下使用redis

帅帅男孩 · 发表于 2018-6-22 06:08:38

　　下载地址：https://github.com/dmajkic/redis/downloads 下载下来的包里有两个，
　　一个是32位的，一个是64位的。根据自己的实情情况选择，我的是32bit，
　　把这个文件夹复制到其它地方，比如D：\redis 目录下。
　　打开一个cmd窗口使用cd命令切换目录到d:\redis 运行 redis-server.exe redis.conf
　　如果想方便的话，可以把redis的路径加到系统的环境变量里，这样就省得再输路径了，后面的那个redis.conf可以省略，如果省略，会启用默认的。输入之后，会显示如下界面：

http://www.iyunv.com/uploadfile/2012/0402/20120402111041385.png

　　这时候别启一个cmd窗口，原来的不要关闭，不然就无法访问服务端了
　　切换到redis目录下运行 redis-cli.exe -h 127.0.0.1 -p 6379 出现下图：

http://www.iyunv.com/uploadfile/2012/0402/20120402111041181.png

　　这时候，就已经完成配置了，现在说下它的的redis.conf配置文件。
　　[plain] view plaincopy

　　001
　　# Redis configuration file example
　　002
　　003
　　# Note on units: when memory size is needed, it is possible to specifiy
　　004
　　# it in the usual form of 1k 5GB 4M and so forth:
　　005
　　#
　　006
　　# 1k => 1000 bytes
　　007
　　# 1kb => 1024 bytes
　　008
　　# 1m => 1000000 bytes
　　009
　　# 1mb => 1024*1024 bytes
　　010
　　# 1g => 1000000000 bytes
　　011
　　# 1gb => 1024*1024*1024 bytes
　　012
　　#
　　013
　　# units are case insensitive so 1GB 1Gb 1gB are all the same.
　　014
　　015
　　# By default Redis does not run as a daemon. Use 'yes' if you need it.
　　016
　　# Note that Redis will write a pid file in /var/run/redis.pid when daemonized.
　　017
　　daemonize no
　　018
　　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
　　019
　　020
　　# When running daemonized, Redis writes a pid file in /var/run/redis.pid by
　　021
　　# default. You can specify a custom pid file location here.
　　022
　　pidfile /var/run/redis.pid
　　023
　　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
　　024
　　# Accept connections on the specified port, default is 6379.
　　025
　　# If port 0 is specified Redis will not listen on a TCP socket.
　　026
　　port 6379
　　027
　　指定Redis监听端口，默认端口为6379
　　028
　　# If you want you can bind a single interface, if the bind option is not
　　029
　　# specified all the interfaces will listen for incoming connections.
　　030
　　#
　　031
　　# bind 127.0.0.1
　　032
　　绑定的主机地址
　　033
　　# Specify the path for the unix socket that will be used to listen for
　　034
　　# incoming connections. There is no default, so Redis will not listen
　　035
　　# on a unix socket when not specified. www.iyunv.com
　　036
　　#
　　037
　　# unixsocket /tmp/redis.sock
　　038
　　# unixsocketperm 755
　　039
　　040
　　# Close the connection after a client is idle for N seconds (0 to disable)
　　041
　　timeout 0
　　042
　　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
　　043
　　# Set server verbosity to 'debug'
　　044
　　# it can be one of:
　　045
　　# debug (a lot of information, useful for development/testing)
　　046
　　# verbose (many rarely useful info, but not a mess like the debug level)
　　047
　　# notice (moderately verbose, what you want in production probably)
　　048
　　# warning (only very important / critical messages are logged)
　　049
　　loglevel verbose
　　050
　　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
　　051
　　# Specify the log file name. Also 'stdout' can be used to force
　　052
　　# Redis to log on the standard output. Note that if you use standard
　　053
　　# output for logging but daemonize, logs will be sent to /dev/null
　　054
　　logfile stdout
　　055
　　日志记录方式，默认为标准输出，如果配置Redis为守护进程方式运行，而这里又配置为日志记录方式为标准输出，则日志将会发送给/dev/null
　　056
　　# To enable logging to the system logger, just set 'syslog-enabled' to yes,
　　057
　　# and optionally update the other syslog parameters to suit your needs.
　　058
　　# syslog-enabled no
　　059
　　060
　　# Specify the syslog identity.
　　061
　　# syslog-ident redis
　　062
　　063
　　# Specify the syslog facility. Must be USER or between LOCAL0-LOCAL7.
　　064
　　# syslog-facility local0
　　065
　　066
　　# Set the number of databases. The default database is DB 0, you can select
　　067
　　# a different one on a per-connection basis using SELECT <dbid> where
　　068
　　# dbid is a number between 0 and 'databases'-1
　　069
　　databases 16 www.iyunv.com
　　070
　　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
　　071
　　################################ SNAPSHOTTING #################################
　　072
　　#
　　073
　　# Save the DB on disk:
　　074
　　#
　　075
　　# save <seconds> <changes>
　　076
　　#
　　077
　　# Will save the DB if both the given number of seconds and the given
　　078
　　# number of write operations against the DB occurred.
　　079
　　#
　　080
　　# In the example below the behaviour will be to save:
　　081
　　# after 900 sec (15 min) if at least 1 key changed
　　082
　　# after 300 sec (5 min) if at least 10 keys changed
　　083
　　# after 60 sec if at least 10000 keys changed
　　084
　　#
　　085
　　# Note: you can disable saving at all commenting all the "save" lines.
　　086
　　087
　　save 900 1
　　088
　　save 300 10
　　089
　　save 60 10000
　　090
　　分别表示900秒（15分钟）内有1个更改，300秒（5分钟）内有10个更改以及60秒内有10000个更改。
　　091
　　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
　　092
　　# Compress string objects using LZF when dump .rdb databases?
　　093
　　# For default that's set to 'yes' as it's almost always a win.
　　094
　　# If you want to save some CPU in the saving child set it to 'no' but
　　095
　　# the dataset will likely be bigger if you have compressible values or keys.
　　096
　　rdbcompression yes
　　097
　　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
　　098
　　# The filename where to dump the DB
　　099
　　dbfilename dump.rdb
　　100
　　指定本地数据库文件名，默认值为dump.rdb
　　101
　　# The working directory.
　　102
　　#
　　103
　　# The DB will be written inside this directory, with the filename specified
　　104
　　# above using the 'dbfilename' configuration directive.
　　105
　　#
　　106
　　# Also the Append Only File will be created inside this directory.
　　107
　　#
　　108
　　# Note that you must specify a directory here, not a file name.
　　109
　　dir ./
　　110
　　指定本地数据库存放目录
　　111
　　################################# REPLICATION #################################
　　112
　　113
　　# Master-Slave replication. Use slaveof to make a Redis instance a copy of
　　114
　　# another Redis server. Note that the configuration is local to the slave
　　115
　　# so for example it is possible to configure the slave to save the DB with a
　　116
　　# different interval, or to listen to another port, and so on. www.iyunv.com
　　117
　　#
　　118
　　# slaveof <masterip> <masterport>
　　119
　　slaveof <masterip> <masterport> 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
　　120
　　# If the master is password protected (using the "requirepass" configuration
　　121
　　# directive below) it is possible to tell the slave to authenticate before
　　122
　　# starting the replication synchronization process, otherwise the master will
　　123
　　# refuse the slave request.
　　124
　　#
　　125
　　# masterauth <master-password>
　　126
　　masterauth <master-password> 当master服务设置了密码保护时，slav服务连接master的密码
　　127
　　# When a slave lost the connection with the master, or when the replication
　　128
　　# is still in progress, the slave can act in two different ways:
　　129
　　#
　　130
　　# 1) if slave-serve-stale-data is set to 'yes' (the default) the slave will
　　131
　　# still reply to client requests, possibly with out of data data, or the
　　132
　　# data set may just be empty if this is the first synchronization.
　　133
　　#
　　134
　　# 2) if slave-serve-stale data is set to 'no' the slave will reply with
　　135
　　# an error "SYNC with master in progress" to all the kind of commands
　　136
　　# but to INFO and SLAVEOF.
　　137
　　#
　　138
　　slave-serve-stale-data yes
　　139
　　140
　　# Slaves send PINGs to server in a predefined interval. It's possible to change
　　141
　　# this interval with the repl_ping_slave_period option. The default value is 10
　　142
　　# seconds. www.iyunv.com
　　143
　　#
　　144
　　# repl-ping-slave-period 10
　　145
　　146
　　# The following option sets a timeout for both Bulk transfer I/O timeout and
　　147
　　# master data or ping response timeout. The default value is 60 seconds.
　　148
　　#
　　149
　　# It is important to make sure that this value is greater than the value
　　150
　　# specified for repl-ping-slave-period otherwise a timeout will be detected
　　151
　　# every time there is low traffic between the master and the slave.
　　152
　　#
　　153
　　# repl-timeout 60
　　154
　　155
　　################################## SECURITY ###################################
　　156
　　157
　　# Require clients to issue AUTH <PASSWORD> before processing any other
　　158
　　# commands. This might be useful in environments in which you do not trust
　　159
　　# others with access to the host running redis-server.
　　160
　　#
　　161
　　# This should stay commented out for backward compatibility and because most
　　162
　　# people do not need auth (e.g. they run their own servers).
　　163
　　#
　　164
　　# Warning: since Redis is pretty fast an outside user can try up to
　　165
　　# 150k passwords per second against a good box. This means that you should
　　166
　　# use a very strong password otherwise it will be very easy to break.
　　167
　　#
　　168
　　# requirepass foobared
　　169
　　requirepass foobared 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
　　170
　　# Command renaming.
　　171
　　#
　　172
　　# It is possilbe to change the name of dangerous commands in a shared
　　173
　　# environment. For instance the CONFIG command may be renamed into something
　　174
　　# of hard to guess so that it will be still available for internal-use
　　175
　　# tools but not available for general clients.
　　176
　　#
　　177
　　# Example:
　　178
　　#
　　179
　　# rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52
　　180
　　#
　　181
　　# It is also possilbe to completely kill a command renaming it into
　　182
　　# an empty string:
　　183
　　#
　　184
　　# rename-command CONFIG ""
　　185
　　186
　　################################### LIMITS ####################################
　　187
　　188
　　# Set the max number of connected clients at the same time. By default there
　　189
　　# is no limit, and it's up to the number of file descriptors the Redis process
　　190
　　# is able to open. The special value '0' means no limits.
　　191
　　# Once the limit is reached Redis will close all the new connections sending
　　192
　　# an error 'max number of clients reached'. www.iyunv.com
　　193
　　#
　　194
　　# maxclients 128
　　195
　　maxclients 128 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
　　196
　　# Don't use more memory than the specified amount of bytes.
　　197
　　# When the memory limit is reached Redis will try to remove keys with an
　　198
　　# EXPIRE set. It will try to start freeing keys that are going to expire
　　199
　　# in little time and preserve keys with a longer time to live.
　　200
　　# Redis will also try to remove objects from free lists if possible.
　　201
　　#
　　202
　　# If all this fails, Redis will start to reply with errors to commands
　　203
　　# that will use more memory, like SET, LPUSH, and so on, and will continue
　　204
　　# to reply to most read-only commands like GET.
　　205
　　#
　　206
　　# WARNING: maxmemory can be a good idea mainly if you want to use Redis as a
　　207
　　# 'state' server or cache, not as a real DB. When Redis is used as a real
　　208
　　# database the memory usage will grow over the weeks, it will be obvious if
　　209
　　# it is going to use too much memory in the long run, and you'll have the time
　　210
　　# to upgrade. With maxmemory after the limit is reached you'll start to get
　　211
　　# errors for write operations, and this may even lead to DB inconsistency.
　　212
　　#
　　213
　　# maxmemory <bytes>
　　214
　　maxmemory <bytes>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
　　215
　　# MAXMEMORY POLICY: how Redis will select what to remove when maxmemory
　　216
　　# is reached? You can select among five behavior:
　　217
　　#
　　218
　　# volatile-lru -> remove the key with an expire set using an LRU algorithm
　　219
　　# allkeys-lru -> remove any key accordingly to the LRU algorithm
　　220
　　# volatile-random -> remove a random key with an expire set
　　221
　　# allkeys->random -> remove a random key, any key
　　222
　　# volatile-ttl -> remove the key with the nearest expire time (minor TTL)
　　223
　　# noeviction -> don't expire at all, just return an error on write operations
　　224
　　#
　　225
　　# Note: with all the kind of policies, Redis will return an error on write
　　226
　　# operations, when there are not suitable keys for eviction.
　　227
　　#
　　228
　　# At the date of writing this commands are: set setnx setex append
　　229
　　# incr decr rpush lpush rpushx lpushx linsert lset rpoplpush sadd
　　230
　　# sinter sinterstore sunion sunionstore sdiff sdiffstore zadd zincrby
　　231
　　# zunionstore zinterstore hset hsetnx hmset hincrby incrby decrby
　　232
　　# getset mset msetnx exec sort www.iyunv.com
　　233
　　#
　　234
　　# The default is:
　　235
　　#
　　236
　　# maxmemory-policy volatile-lru
　　237
　　238
　　# LRU and minimal TTL algorithms are not precise algorithms but approximated
　　239
　　# algorithms (in order to save memory), so you can select as well the sample
　　240
　　# size to check. For instance for default Redis will check three keys and
　　241
　　# pick the one that was used less recently, you can change the sample size
　　242
　　# using the following configuration directive.
　　243
　　#
　　244
　　# maxmemory-samples 3
　　245
　　246
　　############################## APPEND ONLY MODE ###############################
　　247
　　248
　　# By default Redis asynchronously dumps the dataset on disk. If you can live
　　249
　　# with the idea that the latest records will be lost if something like a crash
　　250
　　# happens this is the preferred way to run Redis. If instead you care a lot
　　251
　　# about your data and don't want to that a single record can get lost you should
　　252
　　# enable the append only mode: when this mode is enabled Redis will append
　　253
　　# every write operation received in the file appendonly.aof. This file will
　　254
　　# be read on startup in order to rebuild the full dataset in memory.
　　255
　　#
　　256
　　# Note that you can have both the async dumps and the append only file if you
　　257
　　# like (you have to comment the "save" statements above to disable the dumps).
　　258
　　# Still if append only mode is enabled Redis will load the data from the
　　259
　　# log file at startup ignoring the dump.rdb file.
　　260
　　#
　　261
　　# IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append
　　262
　　# log file in background when it gets too big.
　　263
　　264
　　appendonly no
　　265
　　appendonly no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
　　266
　　# The name of the append only file (default: "appendonly.aof")
　　267
　　# appendfilename appendonly.aof
　　268
　　appendfilename appendonly.aof指定更新日志文件名，默认为appendonly.aof
　　269
　　# The fsync() call tells the Operating System to actually write data on disk
　　270
　　# instead to wait for more data in the output buffer. Some OS will really flush
　　271
　　# data on disk, some other OS will just try to do it ASAP.
　　272
　　#
　　273
　　# Redis supports three different modes:
　　274
　　#
　　275
　　# no: don't fsync, just let the OS flush the data when it wants. Faster.
　　276
　　# always: fsync after every write to the append only log . Slow, Safest.
　　277
　　# everysec: fsync only if one second passed since the last fsync. Compromise.
　　278
　　#
　　279
　　# The default is "everysec" that's usually the right compromise between
　　280
　　# speed and data safety. It's up to you to understand if you can relax this to
　　281
　　# "no" that will will let the operating system flush the output buffer when
　　282
　　# it wants, for better performances (but if you can live with the idea of
　　283
　　# some data loss consider the default persistence mode that's snapshotting),
　　284
　　# or on the contrary, use "always" that's very slow but a bit safer than
　　285
　　# everysec. www.iyunv.com
　　286
　　#
　　287
　　# If unsure, use "everysec".
　　288
　　289
　　# appendfsync always
　　290
　　appendfsync everysec
　　291
　　# appendfsync no
　　292
　　指定更新日志条件，共有3个可选值：
　　293
　　no：表示等操作系统进行数据缓存同步到磁盘（快）
　　294
　　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）
　　295
　　everysec：表示每秒同步一次（折衷，默认值）
　　296
　　# When the AOF fsync policy is set to always or everysec, and a background
　　297
　　# saving process (a background save or AOF log background rewriting) is
　　298
　　# performing a lot of I/O against the disk, in some Linux configurations
　　299
　　# Redis may block too long on the fsync() call. Note that there is no fix for
　　300
　　# this currently, as even performing fsync in a different thread will block
　　301
　　# our synchronous write(2) call.
　　302
　　#
　　303
　　# In order to mitigate this problem it's possible to use the following option
　　304
　　# that will prevent fsync() from being called in the main process while a
　　305
　　# BGSAVE or BGREWRITEAOF is in progress.
　　306
　　#
　　307
　　# This means that while another child is saving the durability of Redis is
　　308
　　# the same as "appendfsync none", that in pratical terms means that it is
　　309
　　# possible to lost up to 30 seconds of log in the worst scenario (with the
　　310
　　# default Linux settings).
　　311
　　#
　　312
　　# If you have latency problems turn this to "yes". Otherwise leave it as
　　313
　　# "no" that is the safest pick from the point of view of durability.
　　314
　　no-appendfsync-on-rewrite no
　　315
　　316
　　# Automatic rewrite of the append only file.
　　317
　　# Redis is able to automatically rewrite the log file implicitly calling
　　318
　　# BGREWRITEAOF when the AOF log size will growth by the specified percentage.
　　319
　　#
　　320
　　# This is how it works: Redis remembers the size of the AOF file after the
　　321
　　# latest rewrite (or if no rewrite happened since the restart, the size of
　　322
　　# the AOF at startup is used).
　　323
　　#
　　324
　　# This base size is compared to the current size. If the current size is
　　325
　　# bigger than the specified percentage, the rewrite is triggered. Also
　　326
　　# you need to specify a minimal size for the AOF file to be rewritten, this
　　327
　　# is useful to avoid rewriting the AOF file even if the percentage increase
　　328
　　# is reached but it is still pretty small.
　　329
　　#
　　330
　　# Specify a precentage of zero in order to disable the automatic AOF
　　331
　　# rewrite feature. www.iyunv.com
　　332
　　333
　　auto-aof-rewrite-percentage 100
　　334
　　auto-aof-rewrite-min-size 64mb
　　335
　　336
　　################################## SLOW LOG ###################################
　　337
　　338
　　# The Redis Slow Log is a system to log queries that exceeded a specified
　　339
　　# execution time. The execution time does not include the I/O operations
　　340
　　# like talking with the client, sending the reply and so forth,
　　341
　　# but just the time needed to actually execute the command (this is the only
　　342
　　# stage of command execution where the thread is blocked and can not serve
　　343
　　# other requests in the meantime).
　　344
　　#
　　345
　　# You can configure the slow log with two parameters: one tells Redis
　　346
　　# what is the execution time, in microseconds, to exceed in order for the
　　347
　　# command to get logged, and the other parameter is the length of the
　　348
　　# slow log. When a new command is logged the oldest one is removed from the
　　349
　　# queue of logged commands.
　　350
　　351
　　# The following time is expressed in microseconds, so 1000000 is equivalent
　　352
　　# to one second. Note that a negative number disables the slow log, while
　　353
　　# a value of zero forces the logging of every command.
　　354
　　slowlog-log-slower-than 10000
　　355
　　356
　　# There is no limit to this length. Just be aware that it will consume memory.
　　357
　　# You can reclaim memory used by the slow log with SLOWLOG RESET.
　　358
　　slowlog-max-len 1024
　　359
　　360
　　################################ VIRTUAL MEMORY ###############################
　　361
　　362
　　### WARNING! Virtual Memory is deprecated in Redis 2.4
　　363
　　### The use of Virtual Memory is strongly discouraged.
　　364
　　365
　　### WARNING! Virtual Memory is deprecated in Redis 2.4
　　366
　　### The use of Virtual Memory is strongly discouraged.
　　367
　　368
　　# Virtual Memory allows Redis to work with datasets bigger than the actual
　　369
　　# amount of RAM needed to hold the whole dataset in memory.
　　370
　　# In order to do so very used keys are taken in memory while the other keys
　　371
　　# are swapped into a swap file, similarly to what operating systems do
　　372
　　# with memory pages. www.iyunv.com
　　373
　　#
　　374
　　# To enable VM just set 'vm-enabled' to yes, and set the following three
　　375
　　# VM parameters accordingly to your needs.
　　376
　　377
　　vm-enabled no
　　378
　　指定是否启用虚拟内存机制，默认值为no，简单的介绍一下，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（在后面的文章我会仔细分析Redis的VM机制）
　　379
　　# vm-enabled yes
　　380
　　381
　　# This is the path of the Redis swap file. As you can guess, swap files
　　382
　　# can't be shared by different Redis instances, so make sure to use a swap
　　383
　　# file for every redis process you are running. Redis will complain if the
　　384
　　# swap file is already in use.
　　385
　　#
　　386
　　# The best kind of storage for the Redis swap file (that's accessed at random)
　　387
　　# is a Solid State Disk (SSD).
　　388
　　#
　　389
　　# *** WARNING *** if you are using a shared hosting the default of putting
　　390
　　# the swap file under /tmp is not secure. Create a dir with access granted
　　391
　　# only to Redis user and configure Redis to create the swap file there.
　　392
　　vm-swap-file /tmp/redis.swap
　　393
　　虚拟内存文件路径，默认值为/tmp/redis.swap，不可多个Redis实例共享
　　394
　　# vm-max-memory configures the VM to use at max the specified amount of
　　395
　　# RAM. Everything that deos not fit will be swapped on disk *if* possible, that
　　396
　　# is, if there is still enough contiguous space in the swap file.
　　397
　　#
　　398
　　# With vm-max-memory 0 the system will swap everything it can. Not a good
　　399
　　# default, just specify the max amount of RAM you can in bytes, but it's
　　400
　　# better to leave some margin. For instance specify an amount of RAM
　　401
　　# that's more or less between 60 and 80% of your free RAM.
　　402
　　vm-max-memory 0 www.iyunv.com
　　403
　　将所有大于vm-max-memory的数据存入虚拟内存,无论vm-max-memory设置多小,所有索引数据都是内存存储的(Redis的索引数据就是keys),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
　　404
　　# Redis swap files is split into pages. An object can be saved using multiple
　　405
　　# contiguous pages, but pages can't be shared between different objects.
　　406
　　# So if your page is too big, small objects swapped out on disk will waste
　　407
　　# a lot of space. If you page is too small, there is less space in the swap
　　408
　　# file (assuming you configured the same number of total swap file pages).
　　409
　　#
　　410
　　# If you use a lot of small objects, use a page size of 64 or 32 bytes.
　　411
　　# If you use a lot of big objects, use a bigger page size.
　　412
　　# If unsure, use the default :)
　　413
　　vm-page-size 32
　　414
　　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，作者建议如果存储很多小对象，page大小最好设置为32或者64bytes；如果存储很大大对象，则可以使用更大的page，如果不确定，就使用默认值
　　415
　　# Number of total memory pages in the swap file.
　　416
　　# Given that the page table (a bitmap of free/used pages) is taken in memory,
　　417
　　# every 8 pages on disk will consume 1 byte of RAM.
　　418
　　#
　　419
　　# The total swap size is vm-page-size * vm-pages
　　420
　　#
　　421
　　# With the default of 32-bytes memory pages and 134217728 pages Redis will
　　422
　　# use a 4 GB swap file, that will use 16 MB of RAM for the page table.
　　423
　　#
　　424
　　# It's better to use the smallest acceptable value for your application,
　　425
　　# but the default is large in order to work in most conditions.
　　426
　　vm-pages 134217728
　　427
　　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）是在放在内存中的，，在磁盘上每8个pages将消耗1byte的内存。
　　428
　　# Max number of VM I/O threads running at the same time.
　　429
　　# This threads are used to read/write data from/to swap file, since they
　　430
　　# also encode and decode objects from disk to memory or the reverse, a bigger
　　431
　　# number of threads can help with big objects even if they can't help with
　　432
　　# I/O itself as the physical device may not be able to couple with many
　　433
　　# reads/writes operations at the same time. www.iyunv.com
　　434
　　#
　　435
　　# The special value of 0 turn off threaded I/O and enables the blocking
　　436
　　# Virtual Memory implementation.
　　437
　　vm-max-threads 4
　　438
　　设置访问swap文件的线程数,最好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
　　439
　　############################### ADVANCED CONFIG ###############################
　　440
　　441
　　# Hashes are encoded in a special way (much more memory efficient) when they
　　442
　　# have at max a given numer of elements, and the biggest element does not
　　443
　　# exceed a given threshold. You can configure this limits with the following
　　444
　　# configuration directives.
　　445
　　hash-max-zipmap-entries 512
　　446
　　hash-max-zipmap-value 64
　　447
　　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
　　448
　　# Similarly to hashes, small lists are also encoded in a special way in order
　　449
　　# to save a lot of space. The special representation is only used when
　　450
　　# you are under the following limits:
　　451
　　list-max-ziplist-entries 512
　　452
　　list-max-ziplist-value 64
　　453
　　454
　　# Sets have a special encoding in just one case: when a set is composed
　　455
　　# of just strings that happens to be integers in radix 10 in the range
　　456
　　# of 64 bit signed integers.
　　457
　　# The following configuration setting sets the limit in the size of the
　　458
　　# set in order to use this special memory saving encoding.
　　459
　　set-max-intset-entries 512 www.iyunv.com
　　460
　　461
　　# Similarly to hashes and lists, sorted sets are also specially encoded in
　　462
　　# order to save a lot of space. This encoding is only used when the length and
　　463
　　# elements of a sorted set are below the following limits:
　　464
　　zset-max-ziplist-entries 128
　　465
　　zset-max-ziplist-value 64
　　466
　　467
　　# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
　　468
　　# order to help rehashing the main Redis hash table (the one mapping top-level
　　469
　　# keys to values). The hash table implementation redis uses (see dict.c)
　　470
　　# performs a lazy rehashing: the more operation you run into an hash table
　　471
　　# that is rhashing, the more rehashing "steps" are performed, so if the
　　472
　　# server is idle the rehashing is never complete and some more memory is used
　　473
　　# by the hash table.
　　474
　　#
　　475
　　# The default is to use this millisecond 10 times every second in order to
　　476
　　# active rehashing the main dictionaries, freeing memory when possible.
　　477
　　#
　　478
　　# If unsure:
　　479
　　# use "activerehashing no" if you have hard latency requirements and it is
　　480
　　# not a good thing in your environment that Redis can reply form time to time
　　481
　　# to queries with 2 milliseconds delay.
　　482
　　#
　　483
　　# use "activerehashing yes" if you don't have such hard requirements but
　　484
　　# want to free memory asap when possible.
　　485
　　activerehashing yes www.iyunv.com
　　486
　　487
　　################################## INCLUDES ###################################
　　488
　　489
　　# Include one or more other config files here. This is useful if you
　　490
　　# have a standard template that goes to all redis server but also need
　　491
　　# to customize a few per-server settings. Include files can include
　　492
　　# other files, so use this wisely.
　　493
　　#
　　494
　　# include /path/to/local.conf
　　495
　　# include /path/to/other.conf
　　496

　　指定包含其它的配置文件，可以在同一主机上多个Redis实例之间使用同一份配置文件，而同时各个实例又拥有自己的特定配置文件

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