oracle 11g ocr 冗余配置



oracle 11g ocr 冗余配置

在11g 安装过程中默认只能指定一个 dg 用来存储：crs ，voting

但是oracle 官方一般建议我们这么来配置：

1、当ocr没有配置镜像，或者冗余存储时 最少3个ocr 。

如果底层存储不是RAID的话，oracle建议镜像OCR，镜像可以避免单点故障。

■ At least two OCR locations if OCR is configured on an Oracle ASM disk group.

You should configure OCR in two independent disk groups. Typically this is the

work area and the recovery area.

2、如果ocr 配置在oracle asm disk group上时，建议最少两个ocr 位置

ocr 应当配置在两个单独的 disk group

■ At least two OCR locations if OCR is configured on mirrored hardware or

third-party mirrored volumes.

3、如果ocr 配置在有镜像的硬件或者在第3方的镜像卷上时也建议最少冗余2个ocr

eg：添加多个ocr （最多5个）

ocrconfig -add +asm_disk_group| file_name

ocrconfig -delete +ASM_disk_group| file_name

[[email protected] ~]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

[[email protected] ~]# ocrconfig -add +ARCH   --------------------------添加一个新的ocr   +ARCH

[[email protected] ~]# ocrcheck                    ------------------------------检查后已经成功添加

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File Name         :      +ARCH

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

同理再添加几个 dg

[[email protected] ~]# ocrconfig -add +DATANEW

[[email protected] ~]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File Name         :      +ARCH

Device/File integrity check succeeded

Device/File Name         :   +DATANEW

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

[[email protected] ~]# ocrconfig -add +FLASH

[[email protected] ~]# orcheck

-bash: orcheck: command not found

[[email protected] ~]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File Name         :      +ARCH

Device/File integrity check succeeded

Device/File Name         :   +DATANEW

Device/File integrity check succeeded

Device/File Name         :     +FLASH

Device/File integrity check succeeded

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

[[email protected] ~]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File Name         :      +ARCH

Device/File integrity check succeeded

Device/File Name         :   +DATANEW

Device/File integrity check succeeded

Device/File Name         :     +FLASH

Device/File integrity check succeeded

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

[[email protected] ~]# ocrcheck -local

Status of Oracle Local Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       2728

Available space (kbytes) :     259392

ID                       :  935756415

Device/File Name         : /u02/app/11.2.0.3/grid/cdata/vmrac1.olr

Device/File integrity check succeeded

Local registry integrity check succeeded

Logical corruption check succeeded

------------这里我们再来看下ocr 的配置信息 ，配置文件在Linux环境下位于 /etc/oracle/ocr.loc

[[email protected] ~]# cd /etc/oracle

[[email protected] oracle]# ls

lastgasp  ocr.loc  ocr.loc.orig  olr.loc  olr.loc.bkp  olr.loc.orig  oprocd  scls_scr  setasmgid

[[email protected] oracle]# more ocr.loc

#Device/file  getting replaced by device +FLASH

ocrconfig_loc=+CRS

ocrmirrorconfig_loc=+ARCH  ----------新添加的 ocr 镜像组

ocrconfig_loc3=+DATANEW

ocrconfig_loc4=+FLASH

local_only=false

[[email protected] oracle]# more olr.loc

olrconfig_loc=/u02/app/11.2.0.3/grid/cdata/vmrac1.olr

crs_home=/u02/app/11.2.0.3/grid

-----------这里处理添加新的ocr外，我们也可以替换老的 ocr dg：

[[email protected] oracle]# ocrconfig -replace +ARCH -replacement +FLASH

[[email protected] oracle]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File Name         :     +FLASH

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

[[email protected] oracle]# ocrconfig -replace +FLASH -replacement +ARCH

[[email protected] oracle]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File Name         :      +ARCH

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

[[email protected] oracle]#

---------------------注意：当 只有一个 ocr dg 时以上命令会报错：

[[email protected] oracle]# ocrcheck

Status of Oracle Cluster Registry is as follows :

Version                  :          3

Total space (kbytes)     :     262120

Used space (kbytes)      :       3540

Available space (kbytes) :     258580

ID                       : 1902812549

Device/File Name         :       +CRS

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check succeeded

[[email protected] oracle]# ocrconfig -replace  +CRS -replacement  +ARCH

PROT-28: Cannot delete or replace the only configured Oracle Cluster Registry location

[[email protected] oracle]#

正确做法：

如果当前的ocr 少于2个 ，则上述ocr 的替换命令会出错

如果只有一个ocr 时我们可以先添加一个ocr ，再删除原来的ocr

# ocrconfig -add new_OCR_location

# ocrconfig -delete current_OCR_location

oracle 11g ocr 冗余配置

时间： 2024-12-18 07:44:04

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