Redis以及Redis的php扩展安装无错版

安装Redis

第一步：下载安装编译

#wgethttp://redis.googlecode.com/files/redis-2.4.4.tar.gz
#tarzxvf redis-2.4.4.tar.gz
#cdredis-2.4.4
#make
#makeinstall
#cpredis.conf/etc/

第二步：修改配置

#vi/etc/redis.conf

配置见附录

第三步：启动进程

#redis-server /etc/redis.conf

查看进程有没有成功启动

#ps -ef | grep redis

测试输入一个键值

#redis-cli set test "123456"

获取键值

#redis-cli get test

关闭redis
# redis-cli shutdown //关闭所有
关闭某个端口上的redis
# redis-cli -p 6397 shutdown //关闭6397端口的redis

说明：关闭以后缓存数据会自动dump到硬盘上，硬盘地址见redis.conf中的dbfilename dump.rdb

PHP扩展

http://code.google.com/p/php-redis/

附录：无错配置

下面是本人配置的全文件

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#Redisconfigurationfileexample

#Noteonunits:whenmemorysizeisneeded,itispossibletospecifiy

#itintheusualformof1k5GB4Mandsoforth:

#

#1k=>1000bytes

#1kb=>1024bytes

#1m=>1000000bytes

#1mb=>1024*1024bytes

#1g=>1000000000bytes

#1gb=>1024*1024*1024bytes

#

#unitsarecaseinsensitiveso1GB1Gb1gBareallthesame.

#BydefaultRedisdoesnotrunasadaemon.Use'yes'ifyouneedit.

#NotethatRediswillwriteapidfilein/var/run/redis.pidwhendaemonized.

daemonizeyes

#Whenrunningdaemonized,Rediswritesapidfilein/var/run/redis.pidby

#default.Youcanspecifyacustompidfilelocationhere.

pidfile/var/run/redis.pid

#Acceptconnectionsonthespecifiedport,defaultis6379.

#Ifport0isspecifiedRediswillnotlistenonaTCPsocket.

port6379

#Ifyouwantyoucanbindasingleinterface,ifthebindoptionisnot

#specifiedalltheinterfaceswilllistenforincomingconnections.

#

bind127.0.0.1

#Specifythepathfortheunixsocketthatwillbeusedtolistenfor

#incomingconnections.Thereisnodefault,soRediswillnotlisten

#onaunixsocketwhennotspecified.

#

#unixsocket/tmp/redis.sock

#unixsocketperm755

#ClosetheconnectionafteraclientisidleforNseconds(0todisable)

timeout600

#Setserververbosityto'debug'

#itcanbeoneof:

#debug(alotofinformation,usefulfordevelopment/testing)

#verbose(manyrarelyusefulinfo,butnotamesslikethedebuglevel)

#notice(moderatelyverbose,whatyouwantinproductionprobably)

#warning(onlyveryimportant/criticalmessagesarelogged)

loglevelverbose

#Specifythelogfilename.Also'stdout'canbeusedtoforce

#Redistologonthestandardoutput.Notethatifyouusestandard

#outputforloggingbutdaemonize,logswillbesentto/dev/null

logfilestdout

#Toenableloggingtothesystemlogger,justset'syslog-enabled'toyes,

#andoptionallyupdatetheothersyslogparameterstosuityourneeds.

#syslog-enabledno

#Specifythesyslogidentity.

#syslog-identredis

#Specifythesyslogfacility.MustbeUSERorbetweenLOCAL0-LOCAL7.

#syslog-facilitylocal0

#Setthenumberofdatabases.ThedefaultdatabaseisDB0,youcanselect

#adifferentoneonaper-connectionbasisusingSELECT<dbid>where

#dbidisanumberbetween0and'databases'-1

databases16

################################SNAPSHOTTING#################################

#

#SavetheDBondisk:

#

#save<seconds><changes>

#

#WillsavetheDBifboththegivennumberofsecondsandthegiven

#numberofwriteoperationsagainsttheDBoccurred.

#

#Intheexamplebelowthebehaviourwillbetosave:

#after900sec(15min)ifatleast1keychanged

#after300sec(5min)ifatleast10keyschanged

#after60secifatleast10000keyschanged

#

#Note:youcandisablesavingatallcommentingallthe"save"lines.

save9001

save30010

save6010000

#CompressstringobjectsusingLZFwhendump.rdbdatabases?

#Fordefaultthat'ssetto'yes'asit'salmostalwaysawin.

#IfyouwanttosavesomeCPUinthesavingchildsetitto'no'but

#thedatasetwilllikelybebiggerifyouhavecompressiblevaluesorkeys.

rdbcompressionyes

#ThefilenamewheretodumptheDB

dbfilenamedump.rdb

#Theworkingdirectory.

#

#TheDBwillbewritteninsidethisdirectory,withthefilenamespecified

#aboveusingthe'dbfilename'configurationdirective.

#

#AlsotheAppendOnlyFilewillbecreatedinsidethisdirectory.

#

#Notethatyoumustspecifyadirectoryhere,notafilename.

dir/usr/local/redis-2.4.4

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#################################REPLICATION#################################

#Master-Slavereplication.UseslaveoftomakeaRedisinstanceacopyof

#anotherRedisserver.Notethattheconfigurationislocaltotheslave

#soforexampleitispossibletoconfiguretheslavetosavetheDBwitha

#differentinterval,ortolistentoanotherport,andsoon.

#

#slaveof<masterip><masterport>

#Ifthemasterispasswordprotected(usingthe"requirepass"configuration

#directivebelow)itispossibletotelltheslavetoauthenticatebefore

#startingthereplicationsynchronizationprocess,otherwisethemasterwill

#refusetheslaverequest.

#

#masterauth<master-password>

#Whenaslavelosttheconnectionwiththemaster,orwhenthereplication

#isstillinprogress,theslavecanactintwodifferentways:

#

#1)ifslave-serve-stale-dataissetto'yes'(thedefault)theslavewill

#stillreplytoclientrequests,possiblywithoutofdatadata,orthe

#datasetmayjustbeemptyifthisisthefirstsynchronization.

#

#2)ifslave-serve-staledataissetto'no'theslavewillreplywith

#anerror"SYNCwithmasterinprogress"toallthekindofcommands

#buttoINFOandSLAVEOF.

#

slave-serve-stale-datayes

##################################SECURITY###################################

#RequireclientstoissueAUTH<PASSWORD>beforeprocessinganyother

#commands.Thismightbeusefulinenvironmentsinwhichyoudonottrust

#otherswithaccesstothehostrunningredis-server.

#

#Thisshouldstaycommentedoutforbackwardcompatibilityandbecausemost

#peopledonotneedauth(e.g.theyruntheirownservers).

#

#Warning:sinceRedisisprettyfastanoutsideusercantryupto

#150kpasswordspersecondagainstagoodbox.Thismeansthatyoushould

#useaverystrongpasswordotherwiseitwillbeveryeasytobreak.

#

#requirepassfoobared

#Commandrenaming.

#

#Itispossilbetochangethenameofdangerouscommandsinashared

#environment.ForinstancetheCONFIGcommandmayberenamedintosomething

#ofhardtoguesssothatitwillbestillavailableforinternal-use

#toolsbutnotavailableforgeneralclients.

#

#Example:

#

#rename-commandCONFIGb840fc02d524045429941cc15f59e41cb7be6c52

#

#Itisalsopossilbetocompletelykillacommandrenamingitinto

#anemptystring:

#

#rename-commandCONFIG""

###################################LIMITS####################################

#Setthemaxnumberofconnectedclientsatthesametime.Bydefaultthere

#isnolimit,andit'suptothenumberoffiledescriptorstheRedisprocess

#isabletoopen.Thespecialvalue'0'meansnolimits.

#OncethelimitisreachedRediswillcloseallthenewconnectionssending

#anerror'maxnumberofclientsreached'.

#

#maxclients128

#Don'tusemorememorythanthespecifiedamountofbytes.

#WhenthememorylimitisreachedRediswilltrytoremovekeyswithan

#EXPIREset.Itwilltrytostartfreeingkeysthataregoingtoexpire

#inlittletimeandpreservekeyswithalongertimetolive.

#Rediswillalsotrytoremoveobjectsfromfreelistsifpossible.

#

#Ifallthisfails,Rediswillstarttoreplywitherrorstocommands

#thatwillusemorememory,likeSET,LPUSH,andsoon,andwillcontinue

#toreplytomostread-onlycommandslikeGET.

#

#WARNING:maxmemorycanbeagoodideamainlyifyouwanttouseRedisasa

#'state'serverorcache,notasarealDB.WhenRedisisusedasareal

#databasethememoryusagewillgrowovertheweeks,itwillbeobviousif

#itisgoingtousetoomuchmemoryinthelongrun,andyou'llhavethetime

#toupgrade.Withmaxmemoryafterthelimitisreachedyou'llstarttoget

#errorsforwriteoperations,andthismayevenleadtoDBinconsistency.

#

#maxmemory<bytes>

#MAXMEMORYPOLICY:howRediswillselectwhattoremovewhenmaxmemory

#isreached?Youcanselectamongfivebehavior:

#

#volatile-lru->removethekeywithanexpiresetusinganLRUalgorithm

#allkeys-lru->removeanykeyaccordinglytotheLRUalgorithm

#volatile-random->removearandomkeywithanexpireset

#allkeys->random->removearandomkey,anykey

#volatile-ttl->removethekeywiththenearestexpiretime(minorTTL)

#noeviction->don'texpireatall,justreturnanerroronwriteoperations

#

#Note:withallthekindofpolicies,Rediswillreturnanerroronwrite

#operations,whentherearenotsuitablekeysforeviction.

#

#Atthedateofwritingthiscommandsare:setsetnxsetexappend

#incrdecrrpushlpushrpushxlpushxlinsertlsetrpoplpushsadd

#sintersinterstoresunionsunionstoresdiffsdiffstorezaddzincrby

#zunionstorezinterstorehsethsetnxhmsethincrbyincrbydecrby

#getsetmsetmsetnxexecsort

#

#Thedefaultis:

#

#maxmemory-policyvolatile-lru

#LRUandminimalTTLalgorithmsarenotprecisealgorithmsbutapproximated

#algorithms(inordertosavememory),soyoucanselectaswellthesample

#sizetocheck.ForinstancefordefaultRediswillcheckthreekeysand

#picktheonethatwasusedlessrecently,youcanchangethesamplesize

#usingthefollowingconfigurationdirective.

#

#maxmemory-samples3

##############################APPENDONLYMODE###############################

#BydefaultRedisasynchronouslydumpsthedatasetondisk.Ifyoucanlive

#withtheideathatthelatestrecordswillbelostifsomethinglikeacrash

#happensthisisthepreferredwaytorunRedis.Ifinsteadyoucarealot

#aboutyourdataanddon'twanttothatasinglerecordcangetlostyoushould

#enabletheappendonlymode:whenthismodeisenabledRediswillappend

#everywriteoperationreceivedinthefileappendonly.aof.Thisfilewill

#bereadonstartupinordertorebuildthefulldatasetinmemory.

#

#Notethatyoucanhaveboththeasyncdumpsandtheappendonlyfileifyou

#like(youhavetocommentthe"save"statementsabovetodisablethedumps).

#StillifappendonlymodeisenabledRediswillloadthedatafromthe

#logfileatstartupignoringthedump.rdbfile.

#

#IMPORTANT:ChecktheBGREWRITEAOFtocheckhowtorewritetheappend

#logfileinbackgroundwhenitgetstoobig.

appendonlyyes

#Thenameoftheappendonlyfile(default:"appendonly.aof")

appendfilenameappendonly.aof

#Thefsync()calltellstheOperatingSystemtoactuallywritedataondisk

#insteadtowaitformoredataintheoutputbuffer.SomeOSwillreallyflush

#dataondisk,someotherOSwilljusttrytodoitASAP.

#

#Redissupportsthreedifferentmodes:

#

#no:don'tfsync,justlettheOSflushthedatawhenitwants.Faster.

#always:fsyncaftereverywritetotheappendonlylog.Slow,Safest.

#everysec:fsynconlyifonesecondpassedsincethelastfsync.Compromise.

#

#Thedefaultis"everysec"that'susuallytherightcompromisebetween

#speedanddatasafety.It'suptoyoutounderstandifyoucanrelaxthisto

#"no"thatwillwilllettheoperatingsystemflushtheoutputbufferwhen

#itwants,forbetterperformances(butifyoucanlivewiththeideaof

#somedatalossconsiderthedefaultpersistencemodethat'ssnapshotting),

#oronthecontrary,use"always"that'sveryslowbutabitsaferthan

#everysec.

#

#Ifunsure,use"everysec".

#appendfsyncalways

appendfsynceverysec

#appendfsyncno

#WhentheAOFfsyncpolicyissettoalwaysoreverysec,andabackground

#savingprocess(abackgroundsaveorAOFlogbackgroundrewriting)is

#performingalotofI/Oagainstthedisk,insomeLinuxconfigurations

#Redismayblocktoolongonthefsync()call.Notethatthereisnofixfor

#thiscurrently,asevenperformingfsyncinadifferentthreadwillblock

#oursynchronouswrite(2)call.

#

#Inordertomitigatethisproblemit'spossibletousethefollowingoption

#thatwillpreventfsync()frombeingcalledinthemainprocesswhilea

#BGSAVEorBGREWRITEAOFisinprogress.

#

#ThismeansthatwhileanotherchildissavingthedurabilityofRedisis

#thesameas"appendfsyncnone",thatinpraticaltermsmeansthatitis

#possibletolostupto30secondsoflogintheworstscenario(withthe

#defaultLinuxsettings).

#

#Ifyouhavelatencyproblemsturnthisto"yes".Otherwiseleaveitas

#"no"thatisthesafestpickfromthepointofviewofdurability.

no-appendfsync-on-rewriteno

#Automaticrewriteoftheappendonlyfile.

#Redisisabletoautomaticallyrewritethelogfileimplicitlycalling

#BGREWRITEAOFwhentheAOFlogsizewillgrowthbythespecifiedpercentage.

#

#Thisishowitworks:RedisremembersthesizeoftheAOFfileafterthe

#latestrewrite(orifnorewritehappenedsincetherestart,thesizeof

#theAOFatstartupisused).

#

#Thisbasesizeiscomparedtothecurrentsize.Ifthecurrentsizeis

#biggerthanthespecifiedpercentage,therewriteistriggered.Also

#youneedtospecifyaminimalsizefortheAOFfiletoberewritten,this

#isusefultoavoidrewritingtheAOFfileevenifthepercentageincrease

#isreachedbutitisstillprettysmall.

#

#SpecifyaprecentageofzeroinordertodisabletheautomaticAOF

#rewritefeature.

auto-aof-rewrite-percentage100

auto-aof-rewrite-min-size64mb

##################################SLOWLOG###################################

#TheRedisSlowLogisasystemtologqueriesthatexceededaspecified

#executiontime.TheexecutiontimedoesnotincludetheI/Ooperations

#liketalkingwiththeclient,sendingthereplyandsoforth,

#butjustthetimeneededtoactuallyexecutethecommand(thisistheonly

#stageofcommandexecutionwherethethreadisblockedandcannotserve

#otherrequestsinthemeantime).

#

#Youcanconfiguretheslowlogwithtwoparameters:onetellsRedis

#whatistheexecutiontime,inmicroseconds,toexceedinorderforthe

#commandtogetlogged,andtheotherparameteristhelengthofthe

#slowlog.Whenanewcommandisloggedtheoldestoneisremovedfromthe

#queueofloggedcommands.

#Thefollowingtimeisexpressedinmicroseconds,so1000000isequivalent

#toonesecond.Notethatanegativenumberdisablestheslowlog,while

#avalueofzeroforcestheloggingofeverycommand.

slowlog-log-slower-than10000

#Thereisnolimittothislength.Justbeawarethatitwillconsumememory.

#YoucanreclaimmemoryusedbytheslowlogwithSLOWLOGRESET.

slowlog-max-len1024

################################VIRTUALMEMORY###############################

###WARNING!VirtualMemoryisdeprecatedinRedis2.4

###TheuseofVirtualMemoryisstronglydiscouraged.

#VirtualMemoryallowsRedistoworkwithdatasetsbiggerthantheactual

#amountofRAMneededtoholdthewholedatasetinmemory.

#Inordertodosoveryusedkeysaretakeninmemorywhiletheotherkeys

#areswappedintoaswapfile,similarlytowhatoperatingsystemsdo

#withmemorypages.

#

#ToenableVMjustset'vm-enabled'toyes,andsetthefollowingthree

#VMparametersaccordinglytoyourneeds.

vm-enabledno

#vm-enabledyes

#ThisisthepathoftheRedisswapfile.Asyoucanguess,swapfiles

#can'tbesharedbydifferentRedisinstances,somakesuretouseaswap

#fileforeveryredisprocessyouarerunning.Rediswillcomplainifthe

#swapfileisalreadyinuse.

#

#ThebestkindofstoragefortheRedisswapfile(that'saccessedatrandom)

#isaSolidStateDisk(SSD).

#

#***WARNING***ifyouareusingasharedhostingthedefaultofputting

#theswapfileunder/tmpisnotsecure.Createadirwithaccessgranted

#onlytoRedisuserandconfigureRedistocreatetheswapfilethere.

vm-swap-file/tmp/redis.swap

#vm-max-memoryconfigurestheVMtouseatmaxthespecifiedamountof

#RAM.Everythingthatdeosnotfitwillbeswappedondisk*if*possible,that

#is,ifthereisstillenoughcontiguousspaceintheswapfile.

#

#Withvm-max-memory0thesystemwillswapeverythingitcan.Notagood

#default,justspecifythemaxamountofRAMyoucaninbytes,butit's

#bettertoleavesomemargin.ForinstancespecifyanamountofRAM

#that'smoreorlessbetween60and80%ofyourfreeRAM.

vm-max-memory0

#Redisswapfilesissplitintopages.Anobjectcanbesavedusingmultiple

#contiguouspages,butpagescan'tbesharedbetweendifferentobjects.

#Soifyourpageistoobig,smallobjectsswappedoutondiskwillwaste

#alotofspace.Ifyoupageistoosmall,thereislessspaceintheswap

#file(assumingyouconfiguredthesamenumberoftotalswapfilepages).

#

#Ifyouusealotofsmallobjects,useapagesizeof64or32bytes.

#Ifyouusealotofbigobjects,useabiggerpagesize.

#Ifunsure,usethedefault:)

vm-page-size32

#Numberoftotalmemorypagesintheswapfile.

#Giventhatthepagetable(abitmapoffree/usedpages)istakeninmemory,

#every8pagesondiskwillconsume1byteofRAM.

#

#Thetotalswapsizeisvm-page-size*vm-pages

#

#Withthedefaultof32-bytesmemorypagesand134217728pagesRediswill

#usea4GBswapfile,thatwilluse16MBofRAMforthepagetable.

#

#It'sbettertousethesmallestacceptablevalueforyourapplication,

#butthedefaultislargeinordertoworkinmostconditions.

vm-pages134217728

#MaxnumberofVMI/Othreadsrunningatthesametime.

#Thisthreadsareusedtoread/writedatafrom/toswapfile,sincethey

#alsoencodeanddecodeobjectsfromdisktomemoryorthereverse,abigger

#numberofthreadscanhelpwithbigobjectseveniftheycan'thelpwith

#I/Oitselfasthephysicaldevicemaynotbeabletocouplewithmany

#reads/writesoperationsatthesametime.

#

#Thespecialvalueof0turnoffthreadedI/Oandenablestheblocking

#VirtualMemoryimplementation.

vm-max-threads4

###############################ADVANCEDCONFIG###############################

#Hashesareencodedinaspecialway(muchmorememoryefficient)whenthey

#haveatmaxagivennumerofelements,andthebiggestelementdoesnot

#exceedagiventhreshold.Youcanconfigurethislimitswiththefollowing

#configurationdirectives.

hash-max-zipmap-entries512

hash-max-zipmap-value64

#Similarlytohashes,smalllistsarealsoencodedinaspecialwayinorder

#tosavealotofspace.Thespecialrepresentationisonlyusedwhen

#youareunderthefollowinglimits:

list-max-ziplist-entries512

list-max-ziplist-value64

#Setshaveaspecialencodinginjustonecase:whenasetiscomposed

#ofjuststringsthathappenstobeintegersinradix10intherange

#of64bitsignedintegers.

#Thefollowingconfigurationsettingsetsthelimitinthesizeofthe

#setinordertousethisspecialmemorysavingencoding.

set-max-intset-entries512

#Similarlytohashesandlists,sortedsetsarealsospeciallyencodedin

#ordertosavealotofspace.Thisencodingisonlyusedwhenthelengthand

#elementsofasortedsetarebelowthefollowinglimits:

zset-max-ziplist-entries128

zset-max-ziplist-value64

#Activerehashinguses1millisecondevery100millisecondsofCPUtimein

#ordertohelprehashingthemainRedishashtable(theonemappingtop-level

#keystovalues).Thehashtableimplementationredisuses(seedict.c)

#performsalazyrehashing:themoreoperationyourunintoanhashtable

#thatisrhashing,themorerehashing"steps"areperformed,soifthe

#serverisidletherehashingisnevercompleteandsomemorememoryisused

#bythehashtable.

#

#Thedefaultistousethismillisecond10timeseverysecondinorderto

#activerehashingthemaindictionaries,freeingmemorywhenpossible.

#

#Ifunsure:

#use"activerehashingno"ifyouhavehardlatencyrequirementsanditis

#notagoodthinginyourenvironmentthatRediscanreplyformtimetotime

#toquerieswith2millisecondsdelay.

#

#use"activerehashingyes"ifyoudon'thavesuchhardrequirementsbut

#wanttofreememoryasapwhenpossible.

activerehashingyes

##################################INCLUDES###################################

#Includeoneormoreotherconfigfileshere.Thisisusefulifyou

#haveastandardtemplatethatgoestoallredisserverbutalsoneed

#tocustomizeafewper-serversettings.Includefilescaninclude

#otherfiles,sousethiswisely.

#

#include/path/to/local.conf

#include/path/to/other.conf

中文说明：

1,是否以后台进程运行，默认为no
daemonize no

2,如以后台进程运行，则需指定一个pid，默认为/var/run/redis.pid
pidfile /var/run/redis.pid

3,监听端口，默认为6379
port 6379

4,绑定主机IP，默认值为127.0.0.1（注释）
bind 127.0.0.1

5,超时时间，默认为300（秒）
timeout 300

6,日志记录等级，有4个可选值，debug，verbose（默认值），notice，warning
loglevel verbose

7,日志记录方式，默认值为stdout
logfile stdout

8,可用数据库数，默认值为16，默认数据库为0
databases 16

9,指出在多长时间内，有多少次更新操作，就将数据同步到数据文件。这个可以多个条件配合，比如默认配置文件中的设置，就设置了三个条件。

900秒（15分钟）内至少有1个key被改变
save 900 1
300秒（5分钟）内至少有10个key被改变
save 300 10

10,存储至本地数据库时是否压缩数据，默认为yes
rdbcompression yes

11,本地数据库文件名，默认值为dump.rdb
dbfilename /root/redis_db/dump.rdb

12,本地数据库存放路径，默认值为 ./
dir /root/redis_db/

13,当本机为从服务时，设置主服务的IP及端口（注释）
slaveof <masterip> <masterport>

14,当本机为从服务时，设置主服务的连接密码（注释）
masterauth <master-password>

15,连接密码（注释）
requirepass foobared

16,最大客户端连接数，默认不限制（注释）
maxclients 128

17,设置最大内存，达到最大内存设置后，Redis会先尝试清除已到期或即将到期的Key，当此方法处理后，任到达最大内存设置，将无法再进行写入操作。（注释）
maxmemory <bytes>

18,是否在每次更新操作后进行日志记录，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。默认值为no
appendonly yes

19,更新日志文件名，默认值为appendonly.aof（注释）
appendfilename /root/redis_db/appendonly.aof

20,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，always表示每次更新操作后手动调用fsync()将数据写到磁盘，everysec表示每秒同步一次（默认值）。
appendfsync everysec

21,是否使用虚拟内存，默认值为no
vm-enabled yes

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,虚拟内存文件以块存储，每块32bytes
vm-page-size 32

25,虚拟内在文件的最大数
vm-pages 134217728

26,可以设置访问swap文件的线程数,设置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,但是对数据完整性有很好的保证.
vm-max-threads 4

27,把小的输出缓存放在一起，以便能够在一个TCP packet中为客户端发送多个响应，具体原理和真实效果我不是很清楚。所以根据注释，你不是很确定的时候就设置成yes
glueoutputbuf yes

28,在redis 2.0中引入了hash数据结构。当hash中包含超过指定元素个数并且最大的元素没有超过临界时，hash将以一种特殊的编码方式（大大减少内存使用）来存储，这里可以设置这两个临界值
hash-max-zipmap-entries 64

29,hash中一个元素的最大值
hash-max-zipmap-value 512

30,开启之后，redis将在每100毫秒时使用1毫秒的CPU时间来对redis的hash表进行重新hash，可以降低内存的使用。当你的使用场景中，有非常严格的实时性需要，不能够接受Redis时不时的对请求有2毫秒的延迟的话，把这项配置为no。如果没有这么严格的实时性要求，可以设置为yes，以便能够尽可能快的释放内存
activerehashing yes

可以参考：

Redis的部署使用文档 http://www.elain.org/?p=505

========================================================

安装PHP的Redis扩展

先去下载https://github.com/nicolasff/phpredis/downloads

#wgethttps://github.com/nicolasff/phpredis/downloads

# tar -zxvf nicolasff-phpredis-2.1.3-124-gd4ad907.tar.gz
# mv nicolasff-phpredis-d4ad907 php-5.3.8/ext/phpredis/
# cd php-5.3.8/ext/phpredis/
# /usr/local/php/bin/phpize
# ./configure --with-php-config=/usr/local/php/bin/php-config
# make && make install

配置php.ini

vi /usr/local/php/lib/php.ini
(加入:
extension=redis.so
)
先要看看有没有extension_dir=/…….
重启apache或者nginx

# /usr/local/apache2/bin/apachectl restart

Redis以及Redis的php扩展安装无错版

测试代码：

[php]view
plaincopy

<?php

$redis=newRedis();

$redis->connect('127.0.0.1',6379);

$redis->set('test','helloworld!');

echo$redis->get('test');

?>

参考：

Linux(CentOS 5.5) Redis 安装及RedisPHP拓展安装应用

http://www.linuxidc.com/Linux/2011-08/41404.htm

安装redis和phpredis模块

http://skandgjxa.blog.163.com/blog/static/14152982011712112933816/

RHEL5下编译安装Redis及其PHP扩展库

http://hi.baidu.com/zjstandup/blog/item/9f38b825d379c96c35a80f7f.html

转自：Redis以及Redis的php扩展安装无错版

Redis以及Redis的php扩展安装无错版

Redis的部署使用文档 http://www.elain.org/?p=505

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