实战案例lvm逻辑卷的使用

02规划节02基础准 配置IP地BOOTPROTO=staticDEFROUTE=yesPEERDNS=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_PEERROUTES=yesIPV6_FAILURE_FATAL=no[root@localhost~]#ipa1:lo:<LOOPBACK,UP,LOWER_UP>mtu65536qdiscnoqueuestateUNKNOWNlink/loopback00:00:00:00:00:00brd00:00:00:00:00:00inet127.0.0.1/8scopehostinet6::1/128scopehost2:eno :<BROADCAST,MULTICAST,UP,LOWER_UP>mtu1500qdiscpfifo_faststateUPqlen1000link/ether00:0c:29:d6:48:b7brdff:ff:ff:ff:ff:ffinet192.168.200.10/24brd192.168.200.255scopeglobalenovalid_lftforeverpreferred_lftforever 添加硬 MAJ:MINRMSIZEROTYPE 20G00500M0part019.5G0 017.5G0lvm 2G0lvm8:16020G0 4G0LVM逻辑卷的使tofdisk(util-linux2.23.2).ChangeswillremaininmemoryBecarefulbeforeusingthewritepartitiontableCommand(mforhelp):pDisk/dev/sdb:21.5GB,sectorsUnits=sectorsof1*512Sectorsize(logical/physical):512bytes/512bytesI/Osize(minimum/optimal):512bytes/512bytesDisklabeltype:dosDeviceBoot BlocksIdSystemCommand(mforhelp):n pprimary(0primary,0extended,4 eextendedSelect(defaultp):Firstsector UsingdefaultvalueLastsector,+sectorsor+size{K,M,G} , ):Partition1oftypeLinuxandofsize5GiBisCommand(mforhelp):nPartitiontype:pprimary(1primary,0extended, eextendedSelect(defaultp):pFirstsector , Lastsector,+sectorsor+size{K,M,G}( ,default Partition2oftypeLinuxandofsize5GiBissetCommand(mforhelp):Disk/dev/sdb:21.5GB,21474836480bytes, Units=sectorsof1*512=512bytesSectorsize(logical/physical):512bytes/512bytesI/Osize(minimum/optimal):512bytes/512bytesDisklabeltype:dos

BlocksIdSystem 83Linux83CommandCommand(mforhelp):Thepartitiontablehasbeenaltered!Callingioctl()tore-readpartitiontable.Syncingdisks.MAJ:MINRMSIZEROTYPE 20G00500M0part019.5G0 017.5G0lvm 8:16 2G0lvm20G0 5G0 5G04G0[root@localhost[root@localhost~]#pvcreate/dev/sdb1/dev/sdb2Physicalvolume"/dev/sdb1"successfullycreatedPhysicalvolume"/dev/sdb2"successfullycreated FmtAttrPSize/dev/sda2centoslvm2a--19.51g lvm2---5.00g lvm2---5.00g PV VG PV 19.51GiB/notusable3.00 PE 4.00Total PV "/dev/sdb1"isanewphysicalvolumeof"5.00---NEWPhysicalvolume--PVNameVGNamePVSize

PESizeTotalPVUUID

000"/dev/sdb2"isanewphysicalvolumeof"5.00---NEWPhysicalvolume--PVNameVGNamePVSizePESizeTotalPEPV

5.00000Volumegroup"myvg"successfullycreated #PV#LV#SNAttrVSizecentos120wz--n-19.51g 200wz--n-9.99g1VGName1VGNamey------Volumegroup--MetadataSequenceNoMetadataSequenceNo3VGAccess VG MAX Cur Open Max Cur 2VG2VGNameActPVVGSizePESizeActPVVGSizePESizeAllocPE/119.514.004984/19.47PE/PE/VG10/40.00---Volumegroup--MetadataMetadataSequenceNoVGStatusMAXLVCurLVMaxPVCurPVActPVVGSizePESizeTotalPEAllocPE/PE/VG

0000229.994.000/2558/9.99（PhysicalExtent），它的默认大小是4MB65536个PE（PhysicalExtent），所以一个PE4MB的PE决定了单个逻辑卷最大容量为256GB，若希望使用大于256Gb的逻------Volumegroup--VGName1MetadataSequenceNo3VGAccess VG MAX 删除卷组，重新创建卷组，并指定PE大小为16MB[root@localhost~]#vgremovemyvg[root@localhost~]#vgremovemyvgCur2Open2Max0Cur1Act1VG19.51PE4.00TotalAllocPE/4984/19.47PE/Size10/40.00VG---Volumegroup--VG System MetadataSequenceNoVGVGMAX0Cur0Open0Max0Cur2Act2VG9.97PE16.00TotalAllocPE/0/PE/ 638/9.97 VG

MAJ:MINRMSIZEROTYPE 20G00500M0part019.5G0 017.5G0lvm 2G0lvm 8:16020G0 4G0000000[root@localhost~]#vgextendmyvg/dev/sdb3Volumegroup"myvg"successfullyextended[root@localhost~]#vgs #PV#LV#SNAttrVSizecentos120wz--n-19.51g 300wz--n-14.95g y ---Volumegroup--VG

MetadataAreas MetadataMetadataSequenceNoVGStatusMAXLVCurLVMaxPVCurPVActPVVGSizePESizeTotalPEAllocPE/00003314.9516.000/PE/PE/VG957/14.95[root@localhost[root@localhost~]#lvcreate-L+5G-nmylvLV LSizePoolOriginData%Meta%MoveLogCpy%Syncrootcentos-wi-ao----17.47gswapcentos-wi-ao----mylvmyvg-wi-a----- '/dev/centos/root'[17.47GiB]inherit '/dev/centos/swap'[2.00GiB]inherit '/dev/myvg/mylv'[5.00GiB]inheritOStype:LinuxStride=0blocks,Stripewidth=0327680 65536blocks(5.00%) forthesuperuser FirstFirstdata 4040block32768blockspergroup,32768fragmentspergroup8192inodespergroupSuperblockbackupsstoredon32768,98304,163840,229376,294912,819200,Creatingjournal(32768blocks):[root@localhost~]#df- SizeUsedAvailUse%Mounted18G872M17G5%01.9G0%01.9G0%1.9G8.6M1.9G1%01.9G0%497M125M373M25%0378M0%4.8G20M4.6G1%Sizeoflogicalvolumemyvg/mylvchangedfrom5.00GiB(320extents)to6.00GiB(384LV LSizePoolOriginData%Meta%MoveLogCpy%Syncrootcentos-wi-ao----17.47gswapcentos-wi-ao----2.00gmylvmyvg-wi-ao----6.00g[root@localhost~]#df-h SizeUsedAvailUse%Mounted18G872M17G5%01.9G0%01.9G0%1.9G8.6M1.9G1%01.9G0%497M125M373M25%037