系统参数优化

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1、1.1.1.系统参数（含版本，PTF）1）文件系统设置操作系统参数值或标准备注操作系统版本AIX 5.3-08 sp5操作系统内核位数64位最大进程数8192n ofiles8192dump大小内存大小的一半Pagingspace 或 SWAP 区8GB/大小1GB/tmp大小3GB/usr大小3GB/home大小1GB/var大小3GB/opt1GB2）内存参数设置strict_maxclie nt =0 maxclie nt%=90maxperm%=90mi nperm%=10lru_file_repage=O3）异步I/O打开异步I/O4）网络参数设置rfc1323=1tcp_sends

2、pace=262144tcp_recvspace=262144somax onn=2048fin_wait2=2405）HACMP参数设置修改 I/O pacing minpout=512 maxpout=1024修改sync同步频率10秒修改心跳线诊断频率slow1）网络参数调整网络参数值/所有节点备注ipqmaxlen512no -pp ipqmaxle n=512rfc13231no -p -o rfc1323=1sb_max1310720no -p -o sb_max=1310720tcp_recvspace262144no -p -o tcp_recvspace=262144tcp_

3、sendspace262144no -p -o tcp_sendspace=262144udp_recvs pace655360135168*10Note: The recomme nded value of this parameter is 10 times the value of the udp_se ndspace parameter. The value must be less than the value of the sb_max parameter.udp_sendspace655368192*16+4096=135168Note: This value is suitab

4、le for a default database in stallati on. For producti on databases, the mini mum value for this parameter is 4 KB plus the value of the database DB_BLOCK_SIZE initialization parameter multiplied by the value of the DB_MULT I BLOCK_REA D_COUNT initialization parameter: (DB_BLOCK_SIZE * DB_MULTIBLOCK

5、_REA D_COUNT) + 4 KBsomaxonn2048no -p -o somax onn=2048fin wait2240no -p -o fin wait2=2401.1.2 .系统安全使用系统服务的原则如下：1）不需要的服务一律关闭2）如果需要使用常见的服务，应该避免使用缺省的端口号3） 如果被使用的服务内部可以对连接的机器和用户进行限制，应该启用限制机制；（例如ftp服务）4）具体设置如下：服务名状态（启动/关闭/视情况）说明dhcpcd关闭autoc onf6关闭n dpd-host关闭n dpd-router关闭syslogd打开lpd关闭routed关闭gated关闭s

6、en dmail关闭portmap关闭in etd打开n amed关闭timed关闭xn tpd打开根据需要打开rwhod关闭sn mpd打开在HACMP环境中，该服务要打开dhcpsd关闭dhcprd关闭dpid2关闭hostmibd打开LPAR管理需要sn mpmibd打开在HACMP环境中，该服务要打开aixmibd关闭mrouted关闭pxed关闭bi nld关闭muxatmd视情况在HACMP环境中，该服务要打开子服务名状态（启动庆闭/视情况）说明Open ssh打开ftp打开tel net打开shell打开根据需要打开或关闭。如果需要打开，要配 合TCP Wrap使用。kshell

7、关闭logi n打开klogi n关闭exec:关闭comsat关闭uucp关闭bootps:关闭fin ger关闭systat关闭n etstat:关闭tftp:关闭talk关闭n talk关闭rquotad关闭rexd关闭rstatd关闭rusersd关闭rwalld关可sprayd天闭pcnfsd关闭echo天闭discard关闭charge n关闭daytime关闭time关闭in stsrv关闭imap2关闭pop3关闭wsmserveam关闭dtspc关闭cmsd关闭ttdbserver关闭godm关闭服务名状态（启动/关闭/视情况）说明rcnfs服务视情况:包括nis和nfs服务

8、，根据应用需要决定qdaem on关闭writesrv关闭piobe关闭打印机。后端（用于打印）Smitty chgaio -defi ned - availableSTATE to be con figured at system restart1.1.3. HACMP 配置1.修改/etc/hosts （两台计算机都要修改），将下列网络标签及对应的IP地址加入该文件。172.100 .77.82172.100 .77.81db1_boot db1_svc200.1.22.43db1_stb172.100 .77.84172.100 .77.83200.1.22.44db2_boot db2

9、_svc db2_stb2.添加串口设备（两台计算机都要添加）#smit ttyList All Defined TTYsAdd a TTYMove a TTY to Ano ther PortChange / Show Characteristics of a TTYRemove a TTYCon figure a Defined TTYGen erate Error ReportTrace a TTYtty rs232 Asyn chro nous Terminalsa0 Available 06-08 2-Port Asyn chro nous EIA-232 PCI AdapterTT

10、Y typeTTY in terfaceDescripti onPare nt adapter* PORT nu mberEn able LOGINBAUD ratePARITYBITS per characterNumber of STOP BITSTIME before adva ncing to n ext port sett ingTERMINAL typeFLOW CONTROL to be usedOPEN DISCIPLINE to be usedSTTY attributes for RUN timeSTTY attributes for LOGINLOGGER nameSTA

11、TUS of device at BOOT timeTRANSMIT buffer cou ntRECEIVE trigger levelSTREAMS modules to be pushed at OPEN timeINPUT map fileOUTPUT map fileCODESET map file3.创建如下四条hacmp启动服务脚本（两台计算机都要创建）ty rs232Asynchronous Terminal sa0 0 disable9600none810 dumbrts dtrope nhupcl iextenhupcl,cread,echoe,cs8 available

12、ldterm none none sbcs/hacmp/dbstart.sh/hacmp/dbstop.sh/hacmp/appstart.sh/hacmp/appstop.shCo nfigure an HACMP ClusterCo nfigure HACMP NodesCo nfigure HACMP SitesCon figure HACMP NetworksCon figure HACMP Communi cati on In terfaces/DevicesCon figure HACMP Persiste nt Node IP Label/AddressesCo nfigure

13、HACMP Global NetworksConfigure HACMP Network ModulesCon figure Topology Services and Group ServicesShow HACMP TopologyAdd a Network ModuleChange a Network Module using Pre-defined ValuesChange a Network Module using Custom V aluesShow a Network ModuleRemove a Network Module* Network Module Namers232

14、DescriptionRS232SerialProtocolFailure Detection RateSlow5. 修改I/O Pacing时间Discover HACMP-related In formatio n from Con figured NodesExte nded Topology Con figurati onExte nded Resource Con figuratio nExte nded Cluster Service Sett ingsExte nded Eve nt Con figurati onExtended Performance T uning Para

15、meters ConfigurationSecurity and Users Con figuratio nSn apshot Con figurati onExport Defin iti on File for On li ne Pla nning WorksheetsImport Cluster Con figurati on from On li ne Pla nning Worksheets FileExte nded Verificati on and Synchroni zati onHACMP Cluster Test ToolChange/Show I/O pacingChan ge/Show syncd freque ncyHIGH water mark for pen di ng write I/Os per file1024LOW water mark for pending write I/Os per file 5126. 修改同步响应时间Chan ge/Show I/O pac ingChange/Show syncd frequency10 syncd freque ncy (in sec onds)