DELL SCV2020存储灾难恢复操作方案2

1、灾难恢复操作方案2一、模拟环境中断主站点与备站点线路，模拟主存储完全损坏二、灾备站点启用服务移除slave存储上repl of test卷与master站点间的映射关系修改repl of test卷名称（防止主备存储通讯正常后，删除远程复制关系时，系统自动对reple of test的操作）将修改后的slave_test卷映射给slave数据库服务器。重启slave数据库服务器，识别新分配的存储卷，并加载文件系统，启动数据库。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、计划回切至主站点3.1、停数据库1）、停数据库2）、umount 文件系统cd /umount /t

4、tt3.2、存储回切操作1）、取消映射2)、手工对slave_test创建快照3）、恢复通讯链路（模拟主存储故障完全解决）确认两台存储是否完全恢复连接4）、删除原先远程复制关系确认test到repl of test关系是否存在，是否存在故障删除test卷的远程复制关系5）、删除master存储上原来的test卷的映射和卷本身6）、建立slave存储到master存储的远程复制关系等待两个存储之间完成数据复制，复制时间受数据量和带宽速度影响。7)、删除slave_tests与repl of slave_test的映射关系，但保留master存储上的repl of slave_test卷8）、修改

5、master存储上repl of slave_test卷名称，并映射个master数据库集群服务器9)、修改master存储test卷快照策略10）、重启2台master数据库服务器识别存储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，将新的卷的UUID36000d3

7、1003818400000000000000002f填写到mpath3下（生产数据8T卷为mpath1）vi /etc/multipath.conf ，修改mpath3的wwid为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）、重新启动两台服务器master-db2: #rebootmaster-db2: # mount /dev/mapper/mpath3-part1 /tttmaster-db2: # cd /tttmaster