OCR相当于Windows的注册表。对于Windows而言,所有的软件信息,用户,配置,安全等等统统都放到注册表里边。而集群呢,同样如此,所有和集群相关的资源,配置,节点,RAC数据库统统都放在这个仓库里。如果OCR被破坏则导致集群服务启动异常,需要修复OCR。因此OCR的管理与维护对于整个集群而言,是相当重要的。本文主要描述了Oracle 10g RAC下的OCR的管理与维护。OCR 相关参考:Oracle RAC OCR 与健忘症 http://www.linuxidc.com/Linux/2013-02/80019.htmOracle RAC OCR 的备份与恢复 http://www.linuxidc.com/Linux/2013-02/80021.htm1、环境 oracle@bo2dbp:~> cat /etc/issue Welcome to SUSE Linux Enterprise Server 10 SP3 (x86_64) - Kernel
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oracle@bo2dbp:~> crsctl query crs activeversion CRS active version on the cluster is [10.2.0.3.0]2、校验OCR文件 oracle@bo2dbp:~> ocrcheck Status of Oracle Cluster Registry is as follows : Version : 2 Total space (kbytes) : 204560 Used space (kbytes) : 6160 Available space (kbytes) : 198400 ID : 1512159503 Device/File Name : /dev/raw/raw1 <-- OCR (primary) Device/File integrity check succeeded
Device/File not configured <-- OCR Mirror (not configured)
Cluster registry integrity check succeeded
#如果clusterware处于关闭状态也可通过查询ocr.loc获得ocr文件所在的位置 oracle@bo2dbp:~> more /etc/oracle/ocr.loc ocrconfig_loc=/dev/raw/raw1 local_only=FALSE
oracle@bo2dbp:~> sudo -s rcraw status root"""s password: /dev/raw/raw1: bound to major 8, minor 33 /dev/raw/raw2: bound to major 8, minor 49 /dev/raw/raw11: bound to major 8, minor 113 /dev/raw/raw21: bound to major 8, minor 129 /dev/raw/raw22: bound to major 8, minor 145 running
oracle@bo2dbp:~> sudo -s /u01/oracle/crs/bin/ocrconfig -replace ocrmirror /dev/raw/raw11 root"""s password: oracle@bo2dbp:~> ocrcheck Status of Oracle Cluster Registry is as follows : Version : 2 Total space (kbytes) : 204560 Used space (kbytes) : 6184 Available space (kbytes) : 198376 ID : 1512159503 Device/File Name : /dev/raw/raw1 Device/File integrity check succeeded Device/File Name : /dev/raw/raw11 #新的ocr镜像已经被添加 Device/File integrity check succeeded
Cluster registry integrity check succeeded
#下面是连接到第二个节点查看 oracle@bo2dbp:~> ssh bo2dbp ocrcheck Status of Oracle Cluster Registry is as follows : Version : 2 Total space (kbytes) : 204560 Used space (kbytes) : 6184 Available space (kbytes) : 198376 ID : 1512159503 Device/File Name : /dev/raw/raw1 Device/File integrity check succeeded Device/File Name : /dev/raw/raw11 #新的ocr镜像已经被添加 Device/File integrity check succeeded
Cluster registry integrity check succeeded
#从两个节点查看ocr.loc文件记录的ocr位置是否发生变化 oracle@bo2dbp:~> more /etc/oracle/ocr.loc #Device/file getting replaced by device /dev/raw/raw11 ocrconfig_loc=/dev/raw/raw1 ocrmirrorconfig_loc=/dev/raw/raw11 #可以看到增加了ocrmirror位置 local_only=false
#下面来尝试多添加一个ocrmirror,我们使用裸设备为raw21的做为镜像 oracle@bo2dbp:~> sudo -s /u01/oracle/crs/bin/ocrconfig -replace ocrmirror /dev/raw/raw21 root"""s password: oracle@bo2dbp:~> ocrcheck Status of Oracle Cluster Registry is as follows : Version : 2 Total space (kbytes) : 204560 Used space (kbytes) : 6184 Available space (kbytes) : 198376 ID : 1512159503 Device/File Name : /dev/raw/raw1 Device/File integrity check succeeded Device/File Name : /dev/raw/raw21 #可以看到原来的raw11已经被替代了 Device/File integrity check succeeded