目标：

  1. 熟悉主要进程的启停顺序
  2. 了解独占模式 -excl
  3. crsctl start crs与crsctl start cluster 区别

1.熟悉主要进程的启停顺序

1.1 启动节点rac1：

 [root@rac1 bin]# ./crsctl start crs -excl

 CRS-: Oracle High Availability Services has been started.  --启动OHASD进程

 CRS-: Attempting to start 'ora.gipcd' on 'rac1'

 CRS-: Attempting to start 'ora.mdnsd' on 'rac1'

 CRS-: Start of 'ora.gipcd' on 'rac1' succeeded             --启动ora.gipcd

 CRS-: Start of 'ora.mdnsd' on 'rac1' succeeded             --启动ora.mdnsd

 CRS-: Attempting to start 'ora.gpnpd' on 'rac1'

 CRS-: Start of 'ora.gpnpd' on 'rac1' succeeded             --启动ora.gpnpd

 CRS-: Attempting to start 'ora.cssdmonitor' on 'rac1'

 CRS-: Start of 'ora.cssdmonitor' on 'rac1' succeeded       --启动ora.cssdmonitor

 CRS-: Attempting to start 'ora.cssd' on 'rac1'

 CRS-: Attempting to clean 'ora.diskmon' on 'rac1'

 CRS-: Clean of 'ora.diskmon' on 'rac1' succeeded           --清除ora.diskmon

 CRS-: Attempting to start 'ora.diskmon' on 'rac1'

 CRS-: Start of 'ora.diskmon' on 'rac1' succeeded           --启动ora.diskmon

 CRS-: Start of 'ora.cssd' on 'rac1' succeeded              --启动ora.cssd

 CRS-: Attempting to start 'ora.ctssd' on 'rac1'

 CRS-: Attempting to start 'ora.drivers.acfs' on 'rac1'

 CRS-: Start of 'ora.ctssd' on 'rac1' succeeded             --启动ora.ctssd

 CRS-: Start of 'ora.drivers.acfs' on 'rac1' succeeded      --启动ora.drivers.acfs

 CRS-: Attempting to start 'ora.asm' on 'rac1'

 CRS-: Start of 'ora.asm' on 'rac1' succeeded               --启动ora.asm

 CRS-: Attempting to start 'ora.crsd' on 'rac1'

 CRS-: Start of 'ora.crsd' on 'rac1' succeeded              --启动ora.crsd

 观察节点rac2：                                                 --节点未启动，说明 crsctl start crs -excl 只启动单节点进程

 [root@rac2 bin]# ps -ef|grep grid

 root           : pts/    :: grep grid

 [root@rac2 bin]#

1.2 关闭节点rac1

 [root@rac1 bin]# ./crsctl stop crs -f

 CRS-: Starting shutdown of Oracle High Availability Services-managed resources on 'rac1'

 CRS-: Attempting to stop 'ora.crsd' on 'rac1'

 CRS-: Stop of 'ora.crsd' on 'rac1' succeeded                               --关闭ora.crsd

 CRS-: Attempting to stop 'ora.cssdmonitor' on 'rac1'

 CRS-: Attempting to stop 'ora.ctssd' on 'rac1'

 CRS-: Attempting to stop 'ora.asm' on 'rac1'

 CRS-: Attempting to stop 'ora.drivers.acfs' on 'rac1'

 CRS-: Attempting to stop 'ora.mdnsd' on 'rac1'

 CRS-: Stop of 'ora.cssdmonitor' on 'rac1' succeeded                        --关闭ora.cssdmonitor

 CRS-: Stop of 'ora.mdnsd' on 'rac1' succeeded                              --关闭ora.mdnsd

 CRS-: Stop of 'ora.ctssd' on 'rac1' succeeded                              --关闭ora.ctssd

 CRS-: Stop of 'ora.drivers.acfs' on 'rac1' succeeded                       --关闭ora.drivers.acfs

 CRS-: Stop of 'ora.asm' on 'rac1' succeeded                                --关闭ora.asm

 CRS-: Attempting to stop 'ora.cssd' on 'rac1'

 CRS-: Stop of 'ora.cssd' on 'rac1' succeeded                               --关闭ora.cssd

 CRS-: Attempting to stop 'ora.gpnpd' on 'rac1'

 CRS-: Attempting to stop 'ora.diskmon' on 'rac1'

 CRS-: Stop of 'ora.gpnpd' on 'rac1' succeeded                              --关闭ora.gpnpd

 CRS-: Attempting to stop 'ora.gipcd' on 'rac1'

 CRS-: Stop of 'ora.diskmon' on 'rac1' succeeded                            --关闭ora.diskmon

 CRS-: Stop of 'ora.gipcd' on 'rac1' succeeded                              --关闭ora.gipcd

 CRS-: Shutdown of Oracle High Availability Services-managed resources on 'rac1' has completed --关闭OHASD进程

 CRS-: Oracle High Availability Services has been stopped.

 [root@rac1 bin]#

　　总结：重要进程的启动顺序为：OHASD -> ora.gpnpd -> ora.cssd -> ora.asm -> ora.crsd

2. 了解独占模式 -excl

　　既然是以独占模式启动，那么有些资源一定是不能被其他节点共享的。出现抢占资源会出现什么情况

2.1 启动节点rac1：

 [root@rac1 bin]# ./crsctl start crs -excl                   -- -excl表示以独占模式启动

 CRS-: Oracle High Availability Services has been started.

 CRS-: Attempting to start 'ora.gipcd' on 'rac1'

 CRS-: Attempting to start 'ora.mdnsd' on 'rac1'

 CRS-: Start of 'ora.gipcd' on 'rac1' succeeded

 CRS-: Start of 'ora.mdnsd' on 'rac1' succeeded

 CRS-: Attempting to start 'ora.gpnpd' on 'rac1'

 CRS-: Start of 'ora.gpnpd' on 'rac1' succeeded

 CRS-: Attempting to start 'ora.cssdmonitor' on 'rac1'

 CRS-: Start of 'ora.cssdmonitor' on 'rac1' succeeded

 CRS-: Attempting to start 'ora.cssd' on 'rac1'

 CRS-: Attempting to clean 'ora.diskmon' on 'rac1'

 CRS-: Clean of 'ora.diskmon' on 'rac1' succeeded

 CRS-: Attempting to start 'ora.diskmon' on 'rac1'

 CRS-: Start of 'ora.diskmon' on 'rac1' succeeded

 CRS-: Start of 'ora.cssd' on 'rac1' succeeded

 CRS-: Attempting to start 'ora.ctssd' on 'rac1'

 CRS-: Attempting to start 'ora.drivers.acfs' on 'rac1'

 CRS-: Start of 'ora.ctssd' on 'rac1' succeeded

 CRS-: Start of 'ora.drivers.acfs' on 'rac1' succeeded

 CRS-: Attempting to start 'ora.asm' on 'rac1'

 CRS-: Start of 'ora.asm' on 'rac1' succeeded

 CRS-: Attempting to start 'ora.crsd' on 'rac1'

 CRS-: Start of 'ora.crsd' on 'rac1' succeeded

 [root@rac1 bin]#

2.2 RAC1在独占模式下时，看看节点RAC2抢占资源时会发生什么：

 [root@rac2 bin]# ./crsctl start crs -excl

 CRS-: Oracle High Availability Services has been started.

 CRS-: Attempting to start 'ora.gipcd' on 'rac2'

 CRS-: Attempting to start 'ora.mdnsd' on 'rac2'

 CRS-: Start of 'ora.gipcd' on 'rac2' succeeded

 CRS-: Start of 'ora.mdnsd' on 'rac2' succeeded

 CRS-: Attempting to start 'ora.gpnpd' on 'rac2'

 CRS-: Start of 'ora.gpnpd' on 'rac2' succeeded

 CRS-: Attempting to start 'ora.cssdmonitor' on 'rac2'

 CRS-: Start of 'ora.cssdmonitor' on 'rac2' succeeded

 CRS-: Attempting to start 'ora.cssd' on 'rac2'

 CRS-: Attempting to clean 'ora.diskmon' on 'rac2'

 CRS-: Clean of 'ora.diskmon' on 'rac2' succeeded

 CRS-: Attempting to start 'ora.diskmon' on 'rac2'

 CRS-: Start of 'ora.diskmon' on 'rac2' succeeded

16 CRS-4402: The CSS daemon was started in exclusive mode but found an active CSS daemon on node rac1, number 1, and is terminating

17 CRS-2674: Start of 'ora.cssd' on 'rac2' failed

 CRS-: Attempting to clean 'ora.cssd' on 'rac2'

 CRS-: Clean of 'ora.cssd' on 'rac2' succeeded

 CRS-: Attempting to stop 'ora.diskmon' on 'rac2'

 CRS-: Stop of 'ora.diskmon' on 'rac2' succeeded

 CRS-: Attempting to stop 'ora.cssdmonitor' on 'rac2'

 CRS-: Stop of 'ora.cssdmonitor' on 'rac2' succeeded

 CRS-: Attempting to stop 'ora.gpnpd' on 'rac2'

 CRS-: Stop of 'ora.gpnpd' on 'rac2' succeeded

 CRS-: Attempting to stop 'ora.mdnsd' on 'rac2'

 CRS-: Stop of 'ora.mdnsd' on 'rac2' succeeded

 CRS-: Attempting to stop 'ora.gipcd' on 'rac2'

 CRS-: Stop of 'ora.gipcd' on 'rac2' succeeded

 CRS-: Command Start failed, or completed with errors.

 [root@rac2 bin]#

　　出现状况了(CRS-4402,CRS-2674),现在看看两个节点的的进程状况.

2.3 查看两个节点此时的进程状况

 节点RAC1的进程状态：

 [root@rac1 bin]# ps -ef|grep grid

 root             : ?        :: /u01/grid/bin/ohasd.bin exclusive

 grid             : ?        :: /u01/grid/bin/oraagent.bin

 grid             : ?        :: /u01/grid/bin/gipcd.bin

 grid             : ?        :: /u01/grid/bin/mdnsd.bin

 grid             : ?        :: /u01/grid/bin/gpnpd.bin

 root             : ?        :: /u01/grid/bin/orarootagent.bin

 grid             : ?        :: /u01/grid/bin/diskmon.bin -d -f

 root         : pts/    :: grep grid

 [root@rac1 bin]#

 节点RAC2的进程状态：

 [root@rac2 bin]# ps -ef|grep grid

 root              : ?        :: /u01/grid/bin/ohasd.bin exclusive

 root           : pts/    :: grep grid

 [root@rac2 bin]#

　　哈哈，在争夺资源时RAC1,RAC2两败俱伤！独占模式一般用于数据库恢复，升级时。

以非独占模式启动则是去掉 -excl：crsctl start crs

3. crsctl start crs与crsctl start cluster 区别

Oracle 11g r2 把一些grid类的组件进行了打包，叫做 grid infrastructure ，简称GI，主要包括如下组件：
1） ohas ：新增的 oracle high availability service。
2） crs：原有的clusterware 组件，功能有很大改变。
3） asm：以前是集成在dbca，现在单独抽了出来，添加了asmca，增强了asmcmd，增强了advm，acfs。
4） oracle net：就是以前数据库的监听那部分，增加了scan。

1. crsctl start/stop crs 是对当前节点的相关资源进行操作的，是包含ohas的，通过check 可以查看结果
[grid@node1 bin]$ ./crsctl check crs
CRS-4638: Oracle High Availability Services is online
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online

crsctl start/stop crs 是会影响到这4种进程的

2. crsctl start/stop cluster 可对集群的所有节点(当然包括当前节点)的相关资源进行操作的，前提是目标节点ohas必需是OK的，通过check 可以查看结果
[grid@node1 bin]$ ./crsctl check cluster
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online

添加 -all  或者 -n node1,node2 参数 可对集群的所有节点或者指定 的 node1,node2 节点操作

[grid@node1 bin]$ ./crsctl check cluster -all
**************************************************************
node1:
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************
node2:
CRS-4537: Cluster Ready Services is online
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
**************************************************************

crsctl start/stop  cluster  只会影响到 这三种进程，不会影响到 ohas。

可以通过 crsctl enable/disable has 来控制has的是否随OS的启动而启动。类似 crs 也有 crsctl enable/disable crs

　

　　

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