12c Grid Infrastructure Management Repository (GIMR)
2016-08-28 14:15 abce 阅读(3608) 评论(0) 编辑 收藏 举报1.什么是管理资料库(Management Repository)
管理资料库是12c中oracle clusterware管理的一个单实例数据库。对应的数据库名是MGMTDB。
因为是一个单实例数据库,所以在集群环境中,会运行在其中一个节点上。
该实例由GI管理,当其所在节点down机后,会fail over到其它节点。
2.MGMTDB数据库的用途
MGMTDB是12c中用来存储cluster health monitor(chm/os、ora.crf)数据和其它数据。
3.MGMTDB数据文件存放位置
在12.1中,MGMTDB数据库数据文件默认和OCR/Voting disks文件放在相同的存储。
在12.1.0.1中,GIMR是可选项,如果在安装GI的时候没有选中该选件,之后也不可以再进行配置该功能;
在12.1.0.2中,GIMR选件是必须安装的,安装后不支持取消该功能。
4.查看管理数据库(MGMTDB)的相关资源
(即ora.mgmtdb、ora.MGMTLSNR)
$ crsctl stat res -t -------------------------------------------------------------------------------- Name Target State Server State details -------------------------------------------------------------------------------- Local Resources -------------------------------------------------------------------------------- ora.CRS.dg ONLINE ONLINE rac12c1 STABLE ONLINE ONLINE rac12c2 STABLE ora.DATA.dg ONLINE ONLINE rac12c1 STABLE ONLINE ONLINE rac12c2 STABLE ora.FRA.dg ONLINE ONLINE rac12c1 STABLE ONLINE ONLINE rac12c2 STABLE ora.LISTENER.lsnr ONLINE ONLINE rac12c1 STABLE ONLINE ONLINE rac12c2 STABLE ora.asm ONLINE ONLINE rac12c1 Started,STABLE ONLINE ONLINE rac12c2 Started,STABLE ora.net1.network ONLINE ONLINE rac12c1 STABLE ONLINE ONLINE rac12c2 STABLE ora.ons ONLINE ONLINE rac12c1 STABLE ONLINE ONLINE rac12c2 STABLE -------------------------------------------------------------------------------- Cluster Resources -------------------------------------------------------------------------------- ora.LISTENER_SCAN1.lsnr 1 ONLINE ONLINE rac12c1 STABLE ora.MGMTLSNR 1 ONLINE ONLINE rac12c1 169.254.78.212 10.10 .18.141,STABLE ora.cvu 1 ONLINE ONLINE rac12c1 STABLE ora.mgmtdb 1 ONLINE ONLINE rac12c1 Open,STABLE ora.oc4j 1 ONLINE ONLINE rac12c1 STABLE ora.rac12c.db 1 ONLINE ONLINE rac12c1 Open,STABLE 2 ONLINE ONLINE rac12c2 Open,STABLE ora.rac12c1.vip 1 ONLINE ONLINE rac12c1 STABLE ora.rac12c2.vip 1 ONLINE ONLINE rac12c2 STABLE ora.scan1.vip 1 ONLINE ONLINE rac12c1 STABLE --------------------------------------------------------------------------------
在OS层查看MGMTDB数据库和监听:
# ps -ef|grep pmon_-MGMTDB oragrid 24964 1 0 10:48 ? 00:00:00 mdb_pmon_-MGMTDB # ps -ef|grep MGMTLSNR oragrid 7236 1 0 10:43 ? 00:00:00 /u01/app/12.1.0/grid/bin/tnslsnr MGMTLSNR -no_crs_notify -inherit
5.如何启动MGMTDB
MGMTDB是由GI管理,应该自动启动并一直运行。
如果由于某种原因down了,使用srvctl工具启动:
$ srvctl start mgmtdb [-startoption <start_option>] [-node <node_name>] $ srvctl start mgmtlsnr [-node <node_name>] 帮助命令: $ srvctl start mgmtdb -help Starts the management database. Usage: srvctl start mgmtdb [-startoption <start_option>] [-node <node_name>] -startoption <start_options> Options to startup command (e.g. OPEN, MOUNT, or "READ ONLY") -node <node_name> Node name -help Print usage $
6.是否有调优、备份MGMTDB的必要
目前官方建议没有必要
7.应该为MGMTDB分配多少磁盘空间
采用外部冗余时:
最小需要:5.2GB(4.5 MGMTGB + 300 MB voting files + 400 MB OCR)。超出4个节点后,每增加一个节点相应需要增加600MB。
更多信息参考:http://docs.oracle.com/database/121/CWLIN/storage.htm#CHDDCAHD
8.操作MGMTDB数据库
#查看MGMTDB当前节点:
$ oclumon manage -get master Master = rac12c1
#查看状态:
$ srvctl status mgmtdb Database is enabled Instance -MGMTDB is running on node rac12c2
#查看配置信息:
$ srvctl config mgmtdb Database unique name: _mgmtdb Database name: Oracle home: <CRS home> Oracle user: oragrid Spfile: +CRS/_MGMTDB/PARAMETERFILE/spfile.271.921062487 Password file: Domain: Start options: open Stop options: immediate Database role: PRIMARY Management policy: AUTOMATIC Type: Management PDB name: rac12c_cluster PDB service: rac12c_cluster Cluster name: rac12c-cluster Database instance: -MGMTDB
#连接MGMTDB实例:
$ export ORACLE_SID=-MGMTDB $ sqlplus / as sysdba SQL> select file_name from dba_data_files union select member file_name from v$logfile; FILE_NAME -------------------------------------------------------------------------------- +CRS/_MGMTDB/DATAFILE/sysaux.260.921062323 +CRS/_MGMTDB/DATAFILE/system.261.921062335 +CRS/_MGMTDB/DATAFILE/undotbs1.262.921062349 +CRS/_MGMTDB/ONLINELOG/group_1.264.921062389 +CRS/_MGMTDB/ONLINELOG/group_2.265.921062389 +CRS/_MGMTDB/ONLINELOG/group_3.266.921062389 6 rows selected. SQL>
#查询MGMTDB的路径:
$ oclumon manage -get reppath CHM Repository Path = +CRS/_MGMTDB/FD9B43BF6A646F8CE043B6A9E80A2815/DATAFILE/sysmgmtdata.272.921062615