进口网站建设,网站改版 总结,意识形态 网站建设存在的问题,2021年热门手游推荐配置文件参数说明: 1. Redis默认不是以守护进程的方式运行#xff0c;可以通过该配置项修改#xff0c;使用yes启用守护进程 daemonize no 2. 当Redis以守护进程方式运行时#xff0c;Redis默认会把pid写入/var/run/redis.pid文件#xff0c;可以通过pidfile指定 pidfile … 配置文件参数说明: 1. 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 daemonize no 2. 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 3. 指定Redis监听端口默认端口为6379作者在自己的一篇博文中解释了为什么选用6379作为默认端口因为6379在手机按键上MERZ对应的号码而MERZ取自意大利歌女Alessia Merz的名字 port 6379 4. 绑定的主机地址 bind 127.0.0.1 5.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 300 6. 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 loglevel verbose 7. 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 logfile stdout 8. 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 databases 16 9. 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 seconds changes Redis默认配置文件中提供了三个条件 save 900 1 save 300 10 save 60 10000 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。 10. 指定存储至本地数据库时是否压缩数据默认为yesRedis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 11. 指定本地数据库文件名默认值为dump.rdb dbfilename dump.rdb 12. 指定本地数据库存放目录 dir ./ 13. 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 14. 当master服务设置了密码保护时slav服务连接master的密码 masterauth master-password 15. 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 foobared 16. 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 17. 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 18. 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 appendonly no 19. 指定更新日志文件名默认为appendonly.aof appendfilename appendonly.aof 20. 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 21. 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 vm-enabled no 22. 虚拟内存文件路径默认值为/tmp/redis.swap不可多个Redis实例共享 vm-swap-file /tmp/redis.swap 23. 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 vm-max-memory 0 24. 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 vm-page-size 32 25. 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。 vm-pages 134217728 26. 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 vm-max-threads 4 27. 设置在向客户端应答时是否把较小的包合并为一个包发送默认为开启 glueoutputbuf yes 28. 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 hash-max-zipmap-entries 64 hash-max-zipmap-value 512 29. 指定是否激活重置哈希默认为开启后面在介绍Redis的哈希算法时具体介绍 activerehashing yes 30. 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 include /path/to/local.conf # 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 yes# 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 /usr/local/redis/run/redis.pid# Accept connections on the specified port, default is 6379port 6379# If you want you can bind a single interface, if the bind option is not# specified all the interfaces will listen for incoming connections.##bind 192.168.20.12# 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 verbose# Specify the log file name. Also stdout 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 stdoutlogfile ./logs/redis.log# 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-1databases 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.save 900 1save 300 10save 60 10000# Compress string objects using LZF when dump .rdb databases?# For default thats set to yes as its 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# The filename where to dump the DBdbfilename dump.rdb# 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 ./data/################################# 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################################## 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################################### LIMITS ##################################### Set the max number of connected clients at the same time. By default there# is no limit, and its up to the number of file descriptors the Redis process# 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.## maxclients 128# Dont 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 youll have the time# to upgrade. With maxmemory after the limit is reached youll start to get# errors for write operations, and this may even lead to DB inconsistency.## maxmemory bytes############################## APPEND ONLY MODE ################################ By default Redis asynchronously dumps the dataset on disk. If you can live# with the idea that the latest records will be lost if something like a crash# happens this is the preferred way to run Redis. If instead you care a lot# about your data and dont 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.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# 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.## IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append# log file in background when it gets too big.appendonly yes# 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: dont 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 if one second passed since the last fsync. Compromise.## The default is everysec thats usually the right compromise between# speed and data safety. Its 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 thats snapshotting),# or on the contrary, use always thats very slow but a bit safer than# everysec.## If unsure, use everysec.# appendfsync alwaysappendfsync everysec# appendfsync no################################ VIRTUAL MEMORY ################################ 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.## To enable VM just set vm-enabled to yes, and set the following three# VM parameters accordingly to your needs.vm-enabled no# vm-enabled yes# This is the path of the Redis swap file. As you can guess, swap files# cant 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.## The best kind of storage for the Redis swap file (thats accessed at random)# is a Solid State Disk (SSD).## *** 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# vm-max-memory configures the VM to use at max the specified amount of# RAM. Everything that deos not fit will be swapped on disk *if* possible, that# is, if there is still enough contiguous space in the swap file.## 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 its# better to leave some margin. For instance specify an amount of RAM# thats more or less between 60 and 80% of your free RAM.vm-max-memory 0# Redis swap files is split into pages. An object can be saved using multiple# contiguous pages, but pages cant be shared between different objects.# So if your page is too big, small objects swapped out on disk will waste# a lot of space. If you page is too small, there is less space in the swap# file (assuming you configured the same number of total swap file pages).## If you use a lot of small objects, use a page size of 64 or 32 bytes.# If you use a lot of big objects, use a bigger page size.# If unsure, use the default :)vm-page-size 32# Number of total memory pages in the swap file.# Given that the page table (a bitmap of free/used pages) is taken in memory,# every 8 pages on disk will consume 1 byte of RAM.## The total swap size is vm-page-size * vm-pages## With the default of 32-bytes memory pages and 134217728 pages Redis will# use a 4 GB swap file, that will use 16 MB of RAM for the page table.## Its better to use the smallest acceptable value for your application,# but the default is large in order to work in most conditions.vm-pages 134217728# Max number of VM I/O threads running at the same time.# This threads are used to read/write data from/to swap file, since they# also encode and decode objects from disk to memory or the reverse, a bigger# number of threads can help with big objects even if they cant help with# I/O itself as the physical device may not be able to couple with many# reads/writes operations at the same time.## The special value of 0 turn off threaded I/O and enables the blocking# Virtual Memory implementation.vm-max-threads 4############################### 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# 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 64hash-max-zipmap-value 512# 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 dont 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 转载于:https://www.cnblogs.com/kenshinobiy/p/4271295.html
