EM:database control
GC:grid control
CC:cloud control(12開始就不叫GC了改叫CC了，目前有12CC、13CC)

OMR
Oracle Management Repository
OMR就是存放GC監控資訊的資料庫，一般存放在sysman使用者下的表，因為要用到監控報警，所以要用到dbsnmp使用者，所以要開啟sysman、dbsnmp兩個使用者
/etc/hsots必須有OMR和OMS的資訊

OMS
Oracle Management Service
OMS簡單可以簡單理解為GC監控，安裝了weblogic和grid control軟體，其中在安裝grid contro過程中要指定OMR伺服器的資訊。
OMS安裝好後，自動在本機安裝了OMA服務
/etc/hsots必須有OMR和OMS的資訊
/etc/oratab資訊預設如下（分別是OMS、OMA的HOME目錄，可以修改*為oms和agent）
*:/u01/app/bea/oracle/Middleware/oms11g:N
*:/u01/app/bea/oracle/Middleware/agent11g:N

OMA
Oracle Management Agent
被監控的伺服器，/etc/hosts必須要有OMS的域名資訊
一般一臺伺服器裝一套OMA就可以了，但是如果有不同的OMS的來監控伺服器，比如13c，12c同時監控同一臺伺服器，則這臺伺服器需要兩套OMA，且版本應該不一樣。
安裝OMA的方法
1、登入OMS伺服器
. oraenv -> oms
cd $ORACLE_HOME/sysman/agent_download/11.1.0.1.0//
copy agentDownload.linux到OMA伺服器比如/home/oracle
2、登入OMA伺服器
./agentDownload.linux -b /u01/app/oracle/product/11.2.0 -y --安裝好後，預設連線OMS的4900埠
-y表示Decline Security Updates，表示不需要輸入郵箱地址
3、安裝好後，/etc/oratab預設有如下資訊
agent:/u01/app/oracle/product/11.2.0/agent11g:N（即第二步-b時指定的HOME目錄加agent11g子目錄，可以修改*為agent）
OMA安裝過程中一定要注意：輸入正確的registration password，否則雖然可以正常安裝agent，但是永遠連不上OMS

OMS的啟動關閉
emctl start oms
emctl stop oms
emctl status oms
emctl status oms -details
emctl status oms -details -sysman_pwd sysman'spassword

OMA的啟動關閉
emctl start agent
emctl stop agent
emctl status agent

OMA連不上OMS的現象和處理方法
1、如果安裝agent過程中輸錯了密碼，連不上OMS，則如下
emctl upload agent
emctl verifykey
emctl secure agent
比如
EMD pingOMS error: Failure connecting to , err -1

2、如果重新在其他目錄安裝了agent，連不上OMS，則如下檢視什麼報錯
emctl upload agent
emctl verifykey
比如
EMD pingOMS error: Invalid ping response "ERROR-Agent is blocked... Please contact EM adminstrator to unblock the agent"
則進入em介面，setup->agent->unblock

3、最後都不行的話重啟OMS，再如上1、2兩種方式

OMA\OMS日誌目錄
OMS日誌在gc_inst執行時的目錄裡，即$INST_HOME/em/EMGC_OMS1/sysman/log
OMS:/u01/app/bea/oracle/gc_inst/em/EMGC_OMS1/sysman/log

agent日誌$AGENT_HOME/sysman/log
OMA:/u01/app/bea/oracle/Middleware/agent11g/sysman/log

[oracle@oms linux_x64]$ . oraenv
ORACLE_SID = [oms] ? agent
-bash: [: too many arguments
The Oracle base for ORACLE_HOME=/u01/app/bea/oracle/Middleware/agent11g is
XPointer evaluation failed: no locset
[oracle@oms linux_x64]$ emctl status agent
Oracle Enterprise Manager 11g Release 1 Grid Control 11.1.0.1.0
Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.
---------------------------------------------------------------
Agent Version : 11.1.0.1.0
OMS Version : 11.1.0.1.0
Protocol Version : 11.1.0.0.0
Agent Home : /u01/app/bea/oracle/Middleware/agent11g
Agent binaries : /u01/app/bea/oracle/Middleware/agent11g
Agent Process ID : 3271
Parent Process ID : 3250
Agent URL :
Repository URL :
Started at : 2017-06-18 01:36:17
Started by user : oracle
Last Reload : 2017-06-18 01:36:17
Last successful upload : 2017-06-18 02:14:43
Total Megabytes of XML files uploaded so far : 5.20
Number of XML files pending upload : 0
Size of XML files pending upload(MB) : 0.00
Available disk space on upload filesystem : 57.63%
Last successful heartbeat to OMS : 2017-06-18 02:17:31
---------------------------------------------------------------
Agent is Running and Ready

[oracle@gc linux]$ . oraenv
ORACLE_SID = [emrep] ? oms
-bash: [: too many arguments
The Oracle base has been set to
XPointer evaluation failed: no locset
[oracle@gc linux]$ emctl status oms
Oracle Enterprise Manager 11g Release 1 Grid Control
Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.
WebTier is Up
Oracle Management Server is Up

[oracle@gc linux]$ emctl status oms -details
Oracle Enterprise Manager 11g Release 1 Grid Control
Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.
Enter Enterprise Manager Root (SYSMAN) Password :
Console Server Host : gc.oracle.com
HTTP Console Port : 7788
HTTPS Console Port : 7799
HTTP Upload Port : 4889
HTTPS Upload Port : 4900
OMS is not configured with SLB or virtual hostname
Agent Upload is locked.
OMS Console is locked.
Active CA ID: 1

[oracle@gc linux]$ emctl status oms -details -sysman_pwd welcome1
Oracle Enterprise Manager 11g Release 1 Grid Control
Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.
Console Server Host : gc.oracle.com
HTTP Console Port : 7788
HTTPS Console Port : 7799
HTTP Upload Port : 4889
HTTPS Upload Port : 4900
OMS is not configured with SLB or virtual hostname
Agent Upload is locked.
OMS Console is locked.
Active CA ID: 1

Grid Control一些術語GC、OMS、OMR、OMA的概念

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