DELL SCV2020存儲(chǔ)災(zāi)難恢復(fù)操作方案2

1、災(zāi)難恢復(fù)操作方案2一、模擬環(huán)境中斷主站點(diǎn)與備站點(diǎn)線路，模擬主存儲(chǔ)完全損壞二、災(zāi)備站點(diǎn)啟用服務(wù)移除slave存儲(chǔ)上repl of test卷與master站點(diǎn)間的映射關(guān)系修改repl of test卷名稱（防止主備存儲(chǔ)通訊正常后，刪除遠(yuǎn)程復(fù)制關(guān)系時(shí)，系統(tǒng)自動(dòng)對(duì)reple of test的操作）將修改后的slave_test卷映射給slave數(shù)據(jù)庫(kù)服務(wù)器。重啟slave數(shù)據(jù)庫(kù)服務(wù)器，識(shí)別新分配的存儲(chǔ)卷，并加載文件系統(tǒng)，啟動(dòng)數(shù)據(jù)庫(kù)。slave-site-db: # fdisk -lDisk /dev/mapper/36000d310038186000000000000000029: 10 GiB,

2、10737418240 bytes, 2 0971520 sectorsUnits: sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 4096 bytesI/O size (minimum/optimal): 2097152 bytes / 2097152 bytesDisklabel type: dosDisk identifier: 0xcbb2660dDevice Boot Start End Sectors Size Id Type/dev/mapper/36000d3100381860

3、00000000000000029-part1 4096 20971519 20967424 10G 83 Linuxslave-site-db: # mount /dev/mapper/36000d310038186000000000000000029-part1 /tttslave-site-db: # cd /tttslave-site-db:/ttt # lsdata data.tar lost+foundslave-site-db:/ttt # cp data.tar 1.tar 三、計(jì)劃回切至主站點(diǎn)3.1、停數(shù)據(jù)庫(kù)1）、停數(shù)據(jù)庫(kù)2）、umount 文件系統(tǒng)cd /umount /t

4、tt3.2、存儲(chǔ)回切操作1）、取消映射2)、手工對(duì)slave_test創(chuàng)建快照3）、恢復(fù)通訊鏈路（模擬主存儲(chǔ)故障完全解決）確認(rèn)兩臺(tái)存儲(chǔ)是否完全恢復(fù)連接4）、刪除原先遠(yuǎn)程復(fù)制關(guān)系確認(rèn)test到repl of test關(guān)系是否存在，是否存在故障刪除test卷的遠(yuǎn)程復(fù)制關(guān)系5）、刪除master存儲(chǔ)上原來(lái)的test卷的映射和卷本身6）、建立slave存儲(chǔ)到master存儲(chǔ)的遠(yuǎn)程復(fù)制關(guān)系等待兩個(gè)存儲(chǔ)之間完成數(shù)據(jù)復(fù)制，復(fù)制時(shí)間受數(shù)據(jù)量和帶寬速度影響。7)、刪除slave_tests與repl of slave_test的映射關(guān)系，但保留master存儲(chǔ)上的repl of slave_test卷8）、修改

5、master存儲(chǔ)上repl of slave_test卷名稱，并映射個(gè)master數(shù)據(jù)庫(kù)集群服務(wù)器9)、修改master存儲(chǔ)test卷快照策略10）、重啟2臺(tái)master數(shù)據(jù)庫(kù)服務(wù)器識(shí)別存儲(chǔ)A、master-db2: #RebootB、master-db2: #fdisk -lDisk /dev/mapper/36000d31003818400000000000000002f: 10 GiB, 10737418240 bytes, 20971520 s ectorsUnits: sectors of 1 * 512 = 512 bytesSector size (logical/physica

6、l): 512 bytes / 4096 bytesI/O size (minimum/optimal): 2097152 bytes / 2097152 bytesDisklabel type: dosDisk identifier: 0xcbb2660dDevice Boot Start End Sectors Size Id Type/dev/mapper/36000d31003818400000000000000002f-part1 4096 20971519 20967424 10G 83 LinuxC、修改/etc/multipath.conf文件，將新的卷的UUID36000d3

7、1003818400000000000000002f填寫(xiě)到mpath3下（生產(chǎn)數(shù)據(jù)8T卷為mpath1）vi /etc/multipath.conf ，修改mpath3的wwid為36000d31003818400000000000000002dmultipaths multipath alias "mpath3" wwid "36000d31003818400000000000000002d" multipath alias "mpath2" wwid "36000d310038184000000000000000015&

8、quot; multipath alias "mpath1" wwid "36000d31003818400000000000000001f" devices device failback "immediate" no_path_retry "queue" path_grouping_policy "multibus" product "Compellent Vol" vendor "COMPELNT" 2）、重新啟動(dòng)兩臺(tái)服務(wù)器master-db2: #rebootmaster-db2: # mount /dev/mapper/mpath3-part1 /tttmaster-db2: # cd /tttmaster