aix workshop for unix administrators_lvm

《aix workshop for unix administrators_lvm》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、AIXWorkshopforUNIXAdministratorsLogicalVolumeManagementComponentsofAIXStorageFilesDirectoriesFileSystemsLogicalStoragePhysicalStorageLogicalVolumeManagerQuorumAIXCert.Sys.Admin.Section6.2.2VGDA=VolumeGroupDescriptionAreaVGdefinationinformation,veryimportantcontainsinfoaboutthevolumegroup,thelog

2、icalvolumesthatinsideonthevolumegroup,andthedisksthatmakeupthevgEachmemberdiskhasatleastonecopy1diskVG:2VGDAsresideonthesamedisk2diskVG:3VGDAs,onediskhas2copies,anotherhave1copy3diskVG:3VGDAs,eachdiskhas1copyAndsoon......Youneedatleast51%VGDAtogettheVGonlinewhenquorumisswithedon(thedefault)Quor

3、um(cont.)VolumeGroupVGDA'sVGDA'sVGDA'sVGDA'sLoosedisk-badluckLoosedisk=66%VGDAmissing=badluckLoosedisk=33%VGDAmissing=OKLooseany1disk=OKAIXCert.Sys.Admin.Section6.2.2QuorumonORoff?YoushouldconsideruseQuorumornot.NormallyturnoffformirroredVGs,thatmakesevenhalfofthedisksfailed,theVGisstillonline.

4、AllmemberdiskmustaccessabletovaryonvgToswitchoffquorumchvg-QnvgnameAIXCert.Sys.Admin.Section6.5VGSAvolumeGroupStatusArea-VGSAcomprisedof127bytes,whereeachbitrepresentsoneofthe1016(127x8)physicalpartitions(pp)thatresideoneachdiskusedinmirrioringasabit_masktodeterminewhichPPshavebecomestaleVolume

5、GrouplimitsNormalvolumegroups(mkvg)Numberofdisks:Max.numberofpartitons/disk1325122162564812884064162032321016#mkvg-s2-t2-ydatavghdisk2VolumeGrouplimitsBigvolumegroups(mkvg-B)Numberofdisks:Max.numberofpartitons/disk12413004886502416325123216256648128128406420321016LimitationofLVMLogicalVolumeMan

6、ager=LVMPartofAIXnofeenotoptionalactuallyverygoodManagesdisksandtheirattributesbycommandsthroughdatabaseofconfigurationthroughdevicedriversfeatureslikemirroring,RAID,allocationAIXCert.Sys.Admin.Section6WorkingwithLogicalVolumeManagerrootvgRootVolumeGroup-rootvgCreatedautomaticallywhileinstallin

7、gAIXPlacedwithinthisVGAIXfilesInitialpagingandotherLVsUsuallyonlythefirstdiskOrtwotoallowmirroringofrootvgOfteninternaldisksRecommendKeeptoasmallnumberofdisks(seemksysblater)volumegrouprootvgvolumegroupBOtherVGOtherVolumeGroupsOth