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Grid Control major components:OMA、OMS and OMR

Grid Control major components:OMA、OMS and OMR

  The Grid Control framework includes:
 
  ● Oracle Management Repository (OMR)
  ● One or more Oracle Management Service (OMS)
  ● One or more Oracle Management Agent (OMA)
 
  GC 不仅可以管理任何主流的 Oracle 产品、而且还能侦测自定义(比如:路由器)的目标
 


  OMAs 收集目标的信息(比如:可用性、配置和性能)、然后把这些信息传递给 OMS 
  一个 OMA 只和一个 OMS 对话、但一个 OMS 能服务多个 OMA
  接着、OMS 把所接收的信息再抄送一份给 OMR 
  一个 OMS 只和一个 OMR 对话、然而一个 OMR 可服务多个 OMS



 ㈠ Oracle Management Agent
 
 The OMA is responsible for :
 ① all active monitoring 
 ② communication between Grid Control and all managed targets.
 
 The OMA:
 
 ● Must be installed on each host server
 
  A single management agent inte易做图ces the OMS with all managed targets on the host server
 
 ● Must be in its own ORACLE_HOME
 
  Management agents are installed in their own ORACLE_HOME、and
  controlled with the emctl utility
 
 ● Communicates with the OMS via HTTP or HTTPS



 ㈡ Oracle Management Service
 
 The OMS is responsible for :
 ① renders the user inte易做图ce for Grid Control, works with all OMAs
 ② stores persistent data in the OMR  
 
 The OMS:
 
 ● Includes member components:
  Ⅰ Oracle HTTP Server (OHS)
  Ⅱ Oracle Application Server Containers for J2EE (OC4J)
  Ⅲ OracleAS Web Cache
 
 ● Is a J2EE application deployed on Oracle Application Server 10g
 
 ● Connects to the OMR by using JDBC
 

 You can connect to the GC via a Web browser through OHS and OracleAS Web Cache:
 
 ① OracleAS Web Cache is configured to listen for DBA's connections on port 7777
  and pass the connection through to the OHS on port 7778
 
 ② OMAs connect to the application directly throughOHS, bypassing OracleAS Web Cache
  In most installations, OHS listens for OMA traffic on port 4889
 
 ㈢ Oracle Management Repository
 
 The OMR is responsible for :
 ① organizes the data receiving from OMS so it can be retrieved by OMS and displayed on GC
 
 The OMR:
 
 ● Resides in an Oracle database
 ● Includes schema objects belonging to SYSMAN
 
  The OMR is installed in an Oracle database as a group of approximately 4,000 schema objects
  These schema objects contain information about:
  GC administrators, targets, and applications that are managed by GC
 
 ● Can be installed in a preexisting database
 
  The OMR may be installed either in its own private database orin an existing database
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