Redis以及Redis的php扩展安装无错版

starxzj

安装Redis

下载最新的

官网：http://redis.io/ 或者http://code.google.com/p/redis/downloads/list

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

[plain]viewplaincopy

• #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
　　
　　测试代码：
[php]viewplaincopy

• <?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.iyunv.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