Contents
明确cwrac数据库存储迁移需求
将现有的EMC存储替换为PowerStore X1000存储，采用asm rebalance技术进行在线迁移。
前期准备工作
执行备份，建议手动再备份asm磁盘组的归档日志
SQL> alter system switch logfile
* ASM copy archivelog FROM ASM to LOCAL
mkdir /backup/$(date +%F)
chown grid:oinstall /backup/$(date +%F)
for i in $(asmcmd ls RECO/CWRAC/ARCHIVELOG/); do asmcmd cp +RECO/CWRAC/ARCHIVELOG/$i /backup/2023-03-18 done
查看ASM磁盘组信息
- login in as grid user
$ asmcmd lsdg
[grid@cwrac1 ~]$ asmcmd lsdg State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name MOUNTED EXTERN N 512 4096 1048576 409592 69647 0 69647 0 N DATA/ MOUNTED EXTERN N 512 4096 1048576 112637 111635 0 111635 0 N RECO/ MOUNTED NORMAL N 512 4096 1048576 9206 8280 3069 2605 0 Y SYSTEM
查看ASM 磁盘空间使用情况
- login in as grid user
$ asmcmd lsdsk -k
Total_MB Free_MB OS_MB Name Failgroup Failgroup_Type Library Label UDID Product Redund Path
51199 8704 51199 DATA1 DATA1 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) DATA1 UNKNOWN ORCL:DATA1
153597 26118 153597 DATA2 DATA2 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) DATA2 UNKNOWN ORCL:DATA2
102398 17413 102398 DATA3 DATA3 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) DATA3 UNKNOWN ORCL:DATA3
102398 17412 102398 DATA4 DATA4 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) DATA4 UNKNOWN ORCL:DATA4
3068 2761 3068 OCR1 OCR1 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) OCR1 UNKNOWN ORCL:OCR1
3069 2760 3069 OCR2 OCR2 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) OCR2 UNKNOWN ORCL:OCR2
3069 2759 3069 OCR3 OCR3 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) OCR3 UNKNOWN ORCL:OCR3
30719 30444 30719 RECO1 RECO1 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) RECO1 UNKNOWN ORCL:RECO1
30719 30440 30719 RECO2 RECO2 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) RECO2 UNKNOWN ORCL:RECO2
51199 50751 51199 RECO3 RECO3 REGULAR ASM Library - Generic Linux, version 2.0.4 (KABI_V2) RECO3 UNKNOWN ORCL:RECO3$ sqlplus / as sysasm
SQL> set linesize 300 column path format a50 column NAME format a15; select GROUP_NUMBER,DISK_NUMBER,HEADER_STATUS,MODE_STATUS,MOUNT_STATUS,STATE,total_mb,free_mb,NAME,PATH from v$asm_disk; GROUP_NUMBER DISK_NUMBER HEADER_STATUS MODE_STATUS MOUNT_STATUS TOTAL_MB FREE_MB NAME PATH ------------ ----------- ------------------------ -------------- -------------- ---------- ---------- ---------------- -------------------- 2 0 MEMBER ONLINE CACHED 51199 8704 DATA1 ORCL:DATA1 1 0 MEMBER ONLINE CACHED 3068 2761 OCR1 ORCL:OCR1 1 1 MEMBER ONLINE CACHED 3069 2760 OCR2 ORCL:OCR2 1 2 MEMBER ONLINE CACHED 3069 2759 OCR3 ORCL:OCR3 3 0 MEMBER ONLINE CACHED 30719 30444 RECO1 ORCL:RECO1 2 2 MEMBER ONLINE CACHED 153597 26118 DATA2 ORCL:DATA2 3 1 MEMBER ONLINE CACHED 30719 30440 RECO2 ORCL:RECO2 2 3 MEMBER ONLINE CACHED 102398 17413 DATA3 ORCL:DATA3 3 2 MEMBER ONLINE CACHED 51199 50751 RECO3 ORCL:RECO3 2 4 MEMBER ONLINE CACHED 102398 17412 DATA4 ORCL:DATA4 10 rows selected.
[grid@cwrac1 ~]$ crsctl query css votedisk ## STATE File Universal Id File Name Disk group -- ----- ----------------- --------- --------- 1. ONLINE 7436bd33ce064f6cbf17609ed9a95ed6 (ORCL:OCR1) [SYSTEM] 2. ONLINE 095cf9e23d9e4fedbfd7aae019809f38 (ORCL:OCR2) [SYSTEM] 3. ONLINE 7783356222294f42bf8a0de169b65d28 (ORCL:OCR3) [SYSTEM]
/etc/init.d/oracleasm querydisk -d OCR1
/etc/init.d/oracleasm querydisk -d OCR2
/etc/init.d/oracleasm querydisk -d OCR3
ls -l /dev/ | grep 8 | grep 65
给cwrac数据库虚拟化分配共享vmdk磁盘
参考VMware KB 1034165
cwrac数据库存储迁移步骤
查看并确认新挂载的磁盘状态
$ lsblk
[root@cwrac1 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sr0 11:0 1 1024M 0 rom sda 8:0 0 300G 0 disk |-sda1 8:1 0 500M 0 part /boot `-sda2 8:2 0 299.5G 0 part |-vg_cwdb1-lv_root (dm-0) 253:0 0 50G 0 lvm / |-vg_cwdb1-lv_swap (dm-1) 253:1 0 7.9G 0 lvm [SWAP] |-vg_cwdb1-lv_backup (dm-2) 253:2 0 100G 0 lvm /backup `-vg_cwdb1-lv_home (dm-3) 253:3 0 141.7G 0 lvm /home sdc 8:32 0 3G 0 disk `-sdc1 8:33 0 3G 0 part sdf 8:80 0 30G 0 disk `-sdf1 8:81 0 30G 0 part sdg 8:96 0 80G 0 disk sde 8:64 0 50G 0 disk `-sde1 8:65 0 50G 0 part sdb 8:16 0 3G 0 disk `-sdb1 8:17 0 3G 0 part sdd 8:48 0 3G 0 disk `-sdd1 8:49 0 3G 0 part sdh 8:112 0 150G 0 disk `-sdh1 8:113 0 150G 0 part sdi 8:128 0 30G 0 disk `-sdi1 8:129 0 30G 0 part sdj 8:144 0 100G 0 disk `-sdj1 8:145 0 100G 0 part sdk 8:160 0 50G 0 disk `-sdk1 8:161 0 50G 0 part sdl 8:176 0 100G 0 disk `-sdl1 8:177 0 100G 0 part
* 结合dmesg命令输出确认新增加的磁盘信息
分区对齐
分区LUN时，建议分区对齐1M边界。使用 fdisk 或 parted 创建分区。但是，只有 parted 可以创建大于 2 TB 的分区。 本项目中将使用 parted 创建分区
在创建分区之前，将设备标记为 GPT。然后，指定分区偏移量为 2048 扇区（1M）。以下命令创建一个占用整个 LUN 的分区。创建分区后，使用分区文件 /dev/mapper/ora-asm-data-001p1 创建 ASMLib 卷。
parted /dev/sdn mklabel gpt mkpart primary 2048s 100% parted /dev/sdo mklabel gpt mkpart primary 2048s 100% parted /dev/sdp mklabel gpt mkpart primary 2048s 100% parted /dev/sdq mklabel gpt mkpart primary 2048s 100% parted /dev/sdr mklabel gpt mkpart primary 2048s 100% parted /dev/sds mklabel gpt mkpart primary 2048s 100% parted /dev/sdt mklabel gpt mkpart primary 2048s 100% parted /dev/sdu mklabel gpt mkpart primary 2048s 100%
创建oracleasm磁盘
SYSTEM
oracleasm createdisk NOCR1 /dev/sdn1 oracleasm createdisk NOCR2 /dev/sdo1 oracleasm createdisk NOCR3 /dev/sdp1
DATA
oracleasm createdisk NDATA1 /dev/sdq1 oracleasm createdisk NDATA2 /dev/sdr1 oracleasm createdisk NDATA3 /dev/sds1
RECO
oracleasm createdisk NRECO1 /dev/sdt1
确认asm能够识别到生效后的磁盘
Add the device mappings to the device mapper disks.
kpartx -a /dev/mapper/NDATA5-TEST
- login in as grid user
$ oracleasm scandisks
$ oracleasm listdisks
$ sqlplus / as sysasm
SQL> select GROUP_NUMBER,DISK_NUMBER,HEADER_STATUS,MODE_STATUS,MOUNT_STATUS,STATE,total_mb,free_mb,NAME,PATH from v$asm_disk;
$ tail -f .../diag/asm/+asm/+ASM/trace/alert.log
正式加入前创建磁盘组测试
为新oracleasm磁盘创建测试磁盘组以确认磁盘是可以正常使用
测试完成之后, 删除该测试磁盘组, 再执行加入现有磁盘组的操作
将磁盘NOCR1-NOCR3加入到SYSTEM磁盘组
alter diskgroup SYSTEM add disk 'ORCL:NOCR1','ORCL:NOCR2','ORCL:NOCR3' rebalance power 6;
或者通过以下命令依次添加(建议一起添加).
alter diskgroup SYSTEM add disk 'ORCL:NOCR1' rebalance power 6; alter diskgroup SYSTEM add disk 'ORCL:NOCR2' rebalance power 6; alter diskgroup SYSTEM add disk 'ORCL:NOCR3' rebalance power 6;
SQL> select * from gv$asm_operation;
然后在DATA中加入DATA磁盘
alter diskgroup DATA add disk 'ORCL:NDATA1','ORCL:NDATA2','ORCL:NDATA3' rebalance power 8;
然后在RECO中加入NRECO磁盘
alter diskgroup RECO add disk 'ORCL:NRECO1' rebalance power 6;
查看rebalance情况与日志对比
$ asmcmd -p lsop
$ tail -f alert.log
备注：确认所有磁盘rebalance完成后，再进行下一步删盘操作；
逐次剔除旧存储对应的asm disk
sqlplus -s '/ as sysasm' << "EOF" alter diskgroup SYSTEM drop disk OCR1 rebalance power 6; alter diskgroup SYSTEM drop disk OCR2 rebalance power 6; alter diskgroup SYSTEM drop disk OCR3 rebalance power 6; EOF
sqlplus -s '/ as sysasm' << "EOF" alter diskgroup DATA drop disk DATA1 rebalance power 6; alter diskgroup DATA drop disk DATA2 rebalance power 6; alter diskgroup DATA drop disk DATA3 rebalance power 6; alter diskgroup DATA drop disk DATA4 rebalance power 6; alter diskgroup RECO drop disk RECO1 rebalance power 6; alter diskgroup RECO drop disk RECO2 rebalance power 6; alter diskgroup RECO drop disk RECO3 rebalance power 6; EOF
- select * from gv$asm_operation;
查看rebalance情况与asm日志
$ asmcmd -p lsop
$ tail -f alert.log
依次回收VMware上的磁盘
先验证一个磁盘回收, 如无异常, 回收所有旧存储的磁盘.
最后建议是重启验证一下, 如果可能的话.