Oracle 11g RAC oc4j/gsd Offline

    Oracle 11g RAC中,发现oc4j以及gsd服务都处于offline状态,这是Oracle 11g RAC默认情形。即便如此,并不影响数据库的使用,因为 oc4j 是用于WLM 的一个资源, WLM在 11.2.0.2 才可用。GSD则是用于支持dbca,srvctl,oem等的交互工具。本文描述将这两个服务切换到online。

1、环境
 [root@linux2 ~]# cat /etc/issue
 Enterprise Linux Enterprise Linux Server release 5.5 (Carthage)
 Kernel \r on an \m
 
 [root@linux2 bin]# ./crsctl query crs activeversion
 Oracle Clusterware active version on the cluster is [11.2.0.1.0]

2、oc4j与所有的gsd处于offline 
 [grid@linux2 ~]$ crs_stat -t | grep OFFLINE
 ora.gsd        ora.gsd.type   OFFLINE   OFFLINE               
 ora.linux1.gsd application    OFFLINE   OFFLINE               
 ora.linux2.gsd application    OFFLINE   OFFLINE               
 ora.oc4j       ora.oc4j.type  OFFLINE   OFFLINE  

3、启动oc4j服务
 #使用srvctl 来启动oc4j服务
 [grid@linux2 ~]$ srvctl start oc4j
 OC4J could not be started
 PRCR-1079 : Failed to start resource ora.oc4j
 CRS-2501: Resource 'ora.oc4j' is disabled    #提示该服务处于disable状态
 
 #尝试使用crsctl来启动,依然失败
 [grid@linux2 ~]$ crsctl start res ora.oc4j -init
 CRS-2613: Could not find resource 'ora.oc4j'.
 CRS-4000: Command Start failed, or completed with errors.

 #下面先将状态置为enable状态 
 [grid@linux2 ~]$ srvctl enable oc4j
 #再次启动成功
 [grid@linux2 ~]$ srvctl start oc4j
 [grid@linux2 ~]$ crs_stat -t | grep oc4j
 ora.oc4j       ora.oc4j.type  ONLINE    ONLINE    linux2      

4、启动gsd服务
 #查看节点linux1上所有的资源状态,可以看到输出的信息表明GSD也被disable了    
 [grid@linux2 ~]$ srvctl status nodeapps -n linux1
 -n <node_name> option has been deprecated.
 VIP linux1-vip is enabled
 VIP linux1-vip is running on node: linux1
 Network is enabled
 Network is running on node: linux1
 GSD is disabled
 GSD is not running on node: linux1
 ONS is enabled
 ONS daemon is running on node: linux1
 eONS is enabled
 eONS daemon is running on node: linux1
 
 #下面查看节点linux2上所有的资源状态,也可以看到输出的信息表明GSD也被disable了 
 [grid@linux2 ~]$ srvctl status nodeapps -n linux2
 -n <node_name> option has been deprecated.
 VIP linux2-vip is enabled
 VIP linux2-vip is running on node: linux2
 Network is enabled
 Network is running on node: linux2
 GSD is disabled
 GSD is not running on node: linux2
 ONS is enabled
 ONS daemon is running on node: linux2
 eONS is enabled
 eONS daemon is running on node: linux2
 
 #将所有的服务置于enable状态
 [grid@linux2 ~]$ srvctl enable nodeapps
 PRKO-2415 : VIP is already enabled on node(s): linux1,linux2
 PRKO-2416 : Network resource is already enabled.
 PRKO-2417 : ONS is already enabled on node(s): linux1,linux2
 PRKO-2418 : eONS is already enabled on node(s): linux1,linux2
 
 #再次查看GSD的状态已经变成enable了
 [grid@linux2 ~]$ srvctl status nodeapps
 VIP linux1-vip is enabled
 VIP linux1-vip is running on node: linux1
 VIP linux2-vip is enabled
 VIP linux2-vip is running on node: linux2
 Network is enabled
 Network is running on node: linux1
 Network is running on node: linux2
 GSD is enabled
 GSD is not running on node: linux1
 GSD is not running on node: linux2
 ONS is enabled
 ONS daemon is running on node: linux1
 ONS daemon is running on node: linux2
 eONS is enabled
 eONS daemon is running on node: linux1
 eONS daemon is running on node: linux2
 
 [grid@linux2 ~]$ crs_stat -t | grep OFFLINE
 ora.gsd        ora.gsd.type   OFFLINE   OFFLINE               
 ora.linux1.gsd application    OFFLINE   OFFLINE               
 ora.linux2.gsd application    OFFLINE   OFFLINE
 
 #启动GSD服务               
 [grid@linux2 ~]$ srvctl start nodeapps 
 PRKO-2421 : Network resource is already started on node(s): linux1,linux2
 PRKO-2420 : VIP is already started on node(s): linux1,linux2
 PRKO-2420 : VIP is already started on node(s): linux1,linux2
 PRKO-2422 : ONS is already started on node(s): linux1,linux2
 PRKO-2423 : eONS is already started on node(s): linux1,linux2
 
 #验证GSD服务
 [grid@linux2 ~]$ crs_stat -t | grep OFFLINE
 [grid@linux2 ~]$ crs_stat -t | grep gsd
 ora.gsd        ora.gsd.type   ONLINE    ONLINE    linux1      
 ora.linux1.gsd application    ONLINE    ONLINE    linux1      
 ora.linux2.gsd application    ONLINE    ONLINE    linux2  
 
 #Author : Robinson
 #Blog   : http://blog.csdn.net/robinson_0612    

5、关于GSD
 The Global Services Daemon (GSD) runs on each node with one GSD process per node. 
 The GSD coordinates with the cluster manager to receive requests from clients such as the DBCA, EM, 
 and the SRVCTL utility to execute administrative job tasks such as instance startup or shutdown. 
 The GSD is not an Oracle instance background process and is therefore not started with the Oracle instance. 
 GSD与rac的管理工具dbca srvctl oem进行交互,用来完成实例的启动关闭等管理任务。 
 为了保证这些管理工具运行正常必须在所有的节点上先启动 gsd。
 一个GSD进程支持在一个节点的多个rac.gsd进程,位于$ORACLE_HOME/bin目录下。
 其log文件为$oracle_home /srvm/log/gsdaemon.log。
 
 例如: 
 假设使用oem工具来启动一个实例,oem把该任务传递给相应的智能引擎,该智能引擎生成一个包含SRVCTL命令的脚本文件,
 GSD进程读取该脚本文件并且执行该脚本,最后GSD把执行结果返回给智能引擎,近而智能引擎返回给OEM。
 
 又例如假设使用srvctl工具关闭所有的实例,GSD进程接受来自SRVCTL工具发出的请求,并 
 在本地节点上执行该请求,然后把执行结果返回给SRVCTL会话。


更多参考

有关Oracle RAC请参考
     使用crs_setperm修改RAC资源的所有者及权限
     使用crs_profile管理RAC资源配置文件
     RAC 数据库的启动与关闭
     再说 Oracle RAC services
     Services in Oracle Database 10g
     Migrate datbase from single instance to Oracle RAC
     Oracle RAC 连接到指定实例
     Oracle RAC 负载均衡测试(结合服务器端与客户端)
     Oracle RAC 服务器端连接负载均衡(Load Balance)
     Oracle RAC 客户端连接负载均衡(Load Balance)
     ORACLE RAC 下非缺省端口监听配置(listener.ora tnsnames.ora)
     ORACLE RAC 监听配置 (listener.ora tnsnames.ora)
     配置 RAC 负载均衡与故障转移
     CRS-1006 , CRS-0215 故障一例 
     基于Linux (RHEL 5.5) 安装Oracle 10g RAC
     使用 runcluvfy 校验Oracle RAC安装环境

有关Oracle 网络配置相关基础以及概念性的问题请参考:
     配置非默认端口的动态服务注册
     配置sqlnet.ora限制IP访问Oracle
     Oracle 监听器日志配置与管理
     设置 Oracle 监听器密码(LISTENER)
     配置ORACLE 客户端连接到数据库

有关基于用户管理的备份和备份恢复的概念请参考
     Oracle 冷备份
     Oracle 热备份
     Oracle 备份恢复概念
     Oracle 实例恢复
     Oracle 基于用户管理恢复的处理
     SYSTEM 表空间管理及备份恢复
     SYSAUX表空间管理及恢复
     Oracle 基于备份控制文件的恢复(unsing backup controlfile)

有关RMAN的备份恢复与管理请参考
     RMAN 概述及其体系结构
     RMAN 配置、监控与管理
     RMAN 备份详解
     RMAN 还原与恢复
     RMAN catalog 的创建和使用
     基于catalog 创建RMAN存储脚本
     基于catalog 的RMAN 备份与恢复
     RMAN 备份路径困惑
     使用RMAN实现异机备份恢复(WIN平台)
     使用RMAN迁移文件系统数据库到ASM
     linux 下RMAN备份shell脚本
     使用RMAN迁移数据库到异机

有关ORACLE体系结构请参考
     Oracle 表空间与数据文件
     Oracle 密码文件
     Oracle 参数文件
     Oracle 联机重做日志文件(ONLINE LOG FILE)
     Oracle 控制文件(CONTROLFILE)
     Oracle 归档日志
     Oracle 回滚(ROLLBACK)和撤销(UNDO)
     Oracle 数据库实例启动关闭过程
     Oracle 10g SGA 的自动化管理
     Oracle 实例和Oracle数据库(Oracle体系结构) 

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