Oracle RAC 备份和恢复Voting Disks Voting Disks 文件不需要每天备份,一般在下面这几种情况下需要备份: ①:Clusterware安装之后。 ②:集群中增加和删除节点之后。 ③:执行Voting Disk的add或delete操作之后。
备份voting Disk示例: 环境:
- [oracle@node2 ~]$ uname -a
- Linux node2 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:54 EDT 2009 i686 i686 i386 GNU/Linux
- SQL> select * from v$version;
-
- BANNER
- ----------------------------------------------------------------
- Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
- PL/SQL Release 10.2.0.1.0 - Production
- CORE 10.2.0.1.0 Production
- TNS for Linux: Version 10.2.0.1.0 - Production
- NLSRTL Version 10.2.0.1.0 - Production
1.查看当前的Voting Disks
- [oracle@node1 ~]$ crsctl query css votedisk
- 0. 0 /dev/raw/raw2
-
- located 1 votedisk(s).
2.备份Voting Disk(用root)
- [iyunv@node1 ~]# dd if=/dev/raw/raw2 of=/home/oracle/backup/votingdisk.bak
- 208864+0 records in
- 208864+0 records out
- 106938368 bytes (107 MB) copied, 150.378 seconds, 711 kB/s
3.检查备份
- [iyunv@node1 backup]# ll
- total 104540
- -rw-r--r-- 1 root root 106938368 Mar 13 21:29 votingdisk.bak
如果Voting Disk的内容没有改变,则可用此备份文件恢复。
恢复Voting Disk示例: 1.停掉crs(./crsctl stop crs),销毁数据模拟,Voting Disk损坏。
- [iyunv@node1 bin]# dd if=/dev/urandom of=/dev/raw/raw2
- 154419+0 records in
- 154419+0 records out
- 79062528 bytes (79 MB) copied, 196.121 seconds, 403 kB/s
损坏后用./crsctl start crs无法启动crs。
2.恢复Voting Disk
- [iyunv@node1 bin]# dd if=/home/oracle/backup/votingdisk.bak of=/dev/raw/raw2
- 208864+0 records in
- 208864+0 records out
- 106938368 bytes (107 MB) copied, 138.541 seconds, 772 kB/s
恢复后用./crsctl start crs正常启动crs
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