oracle vote disk和ocr disk备份与恢复
1.ocr磁盘简介 健忘问题是由于每个节点都有配置信息的拷贝,修改节点的配置信息不同步引起的。Oracle采用的解决方法就是把这个配置文件放在共享的存储上, 这个文件就是 OCR Disk.整个OCR的信息是树形结构的,主要分为3大分支.分别是SYSTEM,DATABASE和CRS,每个人分支都有许多小分支,只能由root用户修改.ocr每4个小时备份一次,只保留5个文件,当天保留3个文件,上个星期保留一个,上个月也保留一个. OCR DISK内容包含: 1).节点信息 2).数据库实例,节点,以及其它映射关系 3).rac 资源配置信息(VIP,SERVICES) 4).数据库启动相关进程 5).CRS每三方应用程序信息 2.ocrcheck(检查ocr内容的一至性,查看ocr的状态) [grid@rac2 ~]$ ocrcheck Status of Oracle Cluster Registry is as follows : Version : 3 Total space (kbytes): 262120 Used space (kbytes) : 3140 Available space (kbytes) : 258980 ID : 1119662722 Device/File Name : +OCR Device/File integrity check succeeded Device/File not configured Cluster registry integrity check succeeded Logical corruption check bypassed due to non-privileged user [grid@rac2 ~]$ 3.ocrdump(查看ocr文件中的内容) [root@rac1 ~]# ll /home/grid/11.2.0/grid/cdata/scan-cluster/ total 58360 -rw------- 1 root root 7462912 Oct 8 18:44 27255153.ocr -rw------- 1 root root 7462912 Oct 10 14:44 backup00.ocr -rw------- 1 root root 7462912 Oct 9 17:58 backup01.ocr -rw------- 1 root root 7462912 Oct 9 13:58 backup02.ocr -rw------- 1 root root 7462912 Oct 10 14:45 day_.ocr -rw------- 1 root root 7462912 Oct 9 13:58 day.ocr -rw------- 1 root root 7462912 Oct 9 17:58 week_.ocr -rw------- 1 root root 7421952 Sep 26 14:48 week.ocr [root@rac1 ~]# /home/grid/11.2.0/grid/bin/ocrdump -backupfile /home/grid/11.2.0/grid/cdata/scan-cluster/backup00.ocr [root@rac1 ~]# ll OCRDUMPFILE -此时当前目生成OCRDUMPFILE文件 -rw------- 1 root root 220258 Oct 10 16:32 OCRDUMPFILE [root@rac1 ~]# more OCRDUMPFILE 10/10/2016 16:32:25 /home/grid/11.2.0/grid/cdata/scan-cluster/backup00.ocr /home/grid/11.2.0/grid/bin/ocrdump.bin -backupfile /home/grid/11.2.0/grid/cdata/scan-cluster/backup00.ocr [SYSTEM] UNDEF : SECURITY : {USER_PERMISSION : PROCR_ALL_ACCESS,GROUP_PERMISSION : PROCR_READ,OTHER_PERMISSION : PROCR_READ,USER_NAME : root,GROUP_NAME : root} [root@rac1 ~]# 4.ocrconfig(维护ocr磁盘) [root@rac1 ~]# /home/grid/11.2.0/grid/bin/ocrconfig -showbackup rac1 2016/10/10 14:45:03 /home/grid/11.2.0/grid/cdata/scan-cluster/backup00.ocr rac1 2016/10/09 17:58:37 /home/grid/11.2.0/grid/cdata/scan-cluster/backup01.ocr rac1 2016/10/09 13:58:33 /home/grid/11.2.0/grid/cdata/scan-cluster/backup02.ocr rac1 2016/10/09 13:58:33 /home/grid/11.2.0/grid/cdata/scan-cluster/day.ocr rac1 2016/09/26 14:48:52 /home/grid/11.2.0/grid/cdata/scan-cluster/week.ocr
[root@rac1 ~]# /home/grid/11.2.0/grid/bin/ocrconfig -manualbackup --启用手动备份 rac1 2016/10/10 17:44:03 /home/grid/11.2.0/grid/cdata/scan-cluster/backup_20161010_174403.ocr [root@rac1 ~]# /home/grid/11.2.0/grid/bin/ocrconfig -restore /home/grid/11.2.0/grid/cdata/scan-cluster/backup_20161010_174403.ocr --恢复ocr信息 [root@rac1 ~]# 5.手动备份ocr磁盘 [root@rac1 ~]# /home/grid/11.2.0/grid/bin/ocrconfig -export /tmp/ocr-20161010.back [root@rac1 ~]# ll /tmp/ocr-20161010.back -rw------- 1 root root 125185 Oct 10 17:49 /tmp/ocr-20161010.back [root@rac1 ~]# /home/grid/11.2.0/grid/bin/ocrconfig -import /tmp/ocr-20161010.back --导入时必须停止crs服务 6.vote disk磁盘简介 Voting Disk这个文件主要用于记录节点成员状态,在出现脑裂时,决定那个Partion获得控制权,其他的 Partion必须从集群中剔除。在安装RAC时也会提示指定这个位置。安装完成后可以通过crsctl query css votedisk命令来查看Voting Disk位置.oracle rac 10G可以用dd工具备份表决磁盘,oracle rac 11g的表决磁盘和ocr磁盘是在一起的,不能用dd工具备份. 1).备份表决磁盘 dd if=/dev/raw/raw3 of=/tmp/votedisk.back bs=1024M count=10 2).恢复表决磁盘 dd if=/tmp/votedisk.backof=/dev/raw/raw3 bs=1024M count=10 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |