Oracle 12cRAC MGMTDB是什么

郑全 · 发表于 2016-10-27 12:01:26

在12c rac 里面,新增加了一个数据库,mgmtdb,这个是干什么,

ora.LISTENER_SCAN1.lsnr
   1       ONLINE  OFFLINE                            STABLE
ora.MGMTLSNR
   1       ONLINE  ONLINE    rac2                   169.254.65.55 192.16
                                                         8.133.121 192.168.13
                                                         2.121,STABLE
ora.cvu
   1       ONLINE  ONLINE    rac1                   STABLE
ora.mgmtdb
   1       ONLINE  ONLINE    rac2                   Open,STABLE
ora.oc4j
   1       ONLINE  ONLINE    rac1                   STABLE
ora.orcl.db
   1       ONLINE  ONLINE    rac1                   Open,STABLE
   2       ONLINE  ONLINE    rac2                   Open,STABLE
ora.rac1.vip
   1       ONLINE  ONLINE    rac1                   STABLE
ora.rac2.vip
   1       ONLINE  ONLINE    rac2                   STABLE
ora.scan1.vip
   1       ONLINE  ONLINE    rac1                   STABLE

还可以进入:

[grid@rac2 ~]$ . oraenv
ORACLE_SID = [+ASM2] ? -MGMTDB
The Oracle base remains unchanged with value /u01/app/grid/base
[grid@rac2 ~]$ sqlplus /nolog
co
SQL*Plus: Release 12.1.0.2.0 Production on Thu Oct 27 11:39:38 2016

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

SQL> nn / as sysdba
Connected.
SQL> select open_mode from v$database;

OPEN_MODE
--------------------
READ WRITE

SQL> show parameter cluster

NAME                               TYPE       VALUE
------------------------------------ ----------- ------------------------------
cluster_database                   boolean    FALSE
cluster_database_instances          integer    1
cluster_interconnects             string

看来是一个单库 .

SQL> select name,open_mode from v$pdbs;

NAME                         OPEN_MODE
------------------------------ ----------
PDB$SEED                      READ ONLY
SCANIP                      READ WRITE

也是一个容器

有哪些用户:

select username,account_status from dba_users

USERNAME                      ACCOUNT_STATUS
------------------------------ --------------------------------
ANONYMOUS                   EXPIRED & LOCKED
DBSNMP                      EXPIRED & LOCKED
WMSYS                         EXPIRED & LOCKED
XDB                         EXPIRED & LOCKED
APPQOSSYS                   EXPIRED & LOCKED
GSMADMIN_INTERNAL             EXPIRED & LOCKED
GSMCATUSER                   EXPIRED & LOCKED
SYSBACKUP                   EXPIRED & LOCKED
OUTLN                         EXPIRED & LOCKED
DIP                         EXPIRED & LOCKED
SYSDG                         EXPIRED & LOCKED

USERNAME                      ACCOUNT_STATUS
------------------------------ --------------------------------
ORACLE_OCM                   EXPIRED & LOCKED
SYSKM                         EXPIRED & LOCKED
XS$NULL                      EXPIRED & LOCKED
GSMUSER                      EXPIRED & LOCKED
AUDSYS                      EXPIRED & LOCKED
SYSTEM                      OPEN
SYS                         OPEN

看看有哪些文件,并在哪里 :

  1* select file_name,con_id from cdb_data_files

FILE_NAME                                                                                              CON_ID
---------------------------------------------------------------------------------------------------- ----------
+DGOCR/_MGMTDB/DATAFILE/system.258.923438205                                                                1
+DGOCR/_MGMTDB/DATAFILE/sysaux.257.923438163                                                                1
+DGOCR/_MGMTDB/DATAFILE/undotbs1.259.923438241                                                             1
+DGOCR/_MGMTDB/FD9B43BF6A646F8CE043B6A9E80A2815/DATAFILE/system.270.923438737                               3
+DGOCR/_MGMTDB/FD9B43BF6A646F8CE043B6A9E80A2815/DATAFILE/sysaux.271.923438737                               3
+DGOCR/_MGMTDB/FD9B43BF6A646F8CE043B6A9E80A2815/DATAFILE/users.274.923438737                               3
+DGOCR/_MGMTDB/FD9B43BF6A646F8CE043B6A9E80A2815/DATAFILE/sysgridhomedata.272.923438737                      3
+DGOCR/_MGMTDB/FD9B43BF6A646F8CE043B6A9E80A2815/DATAFILE/sysmgmtdata.269.923438737                         3
+DGOCR/_MGMTDB/FD9B43BF6A646F8CE043B6A9E80A2815/DATAFILE/sysmgmtdatadb.273.923438737                         3

SQL> select sum(bytes/1024/1024) from cdb_data_files;

SUM(BYTES/1024/1024)
--------------------
            3538

是说12c rac的ocr盘要求要8g一块盘,看来这个增加了东西在里面.
当然,这个数据库数据可以移动到其他地方去.

郑全 · 发表于 2016-10-27 12:02:50

马上看看网上的资料,找到一片:

1 MGMTDB 说明
在Oracle 12.1.0.1的Grid Infrastructure 的安装中，可以选择是否安装Grid Infrastructure Management Repository (GIMR) 数据库：MGMTDB. 如下图：

登录/注册后可看大图

在Grid Infrastructure 12.1.0.2 中，已经没有改选项，MIMR 数据库已经变成了强制选项。

在Oracle 12c 中Management Database 用来存储Cluster HealthMonitor(CHM/OS,ora.crf) ，Oracle Database QoS Management，Rapid Home Provisioning和其他的数据。

ManagementRepository 是受12c Clusterware 管理的一个单实例，在Cluster 启动的时会启动MGMTDG并在其中一个节点上运行，并受GI 管理，如果运行MGMTDG的节点宕机了，GI 会自动把MGMTDB 转移到其他的节点上。

默认情况，MGMTDB 数据库的数据文件存放在共享的设备，如OCR/Voting 的磁盘组中，但后期可以移动位置。

在12.1.0.1 中，GIMR 是可选的，如果在安装GI的时候，没有选择Management Database 数据库，那么所有依赖的特性，如ClusterHealth Monitor (CHM/OS) 就会被禁用。

当然，在12.1.0.2 中，可以忽略这个问题，因为是强制安装GIMR了。

另外，对于MGMT 数据库，在目前的版本中，也不需要手工对其进行备份。

2 MGMTDB 基本操作
2.1 查看Management DB 相关的资源:?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

[root@rac1 ~]# crsctl stat res -t

--------------------------------------------------------------------------------

Name Target State Server Statedetails

--------------------------------------------------------------------------------

Local Resources

--------------------------------------------------------------------------------

……

ora.MGMTLSNR

1 ONLINE ONLINE rac2 169.254.142.79 192.1

68.57.6,STABLE

ora.mgmtdb

1 ONLINE ONLINE rac2 Open,STABLE

……

[root@rac1 ~]#

使用crsctl 命令可以看到ora.mgmtdb和ora.MGMTLSNR。

在操作系统层面，也可以查看到有2个对应的进程：
?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

[root@rac2 ~]# ps -ef| grep pmon_-MGMTDB

grid 7452 1 0 14:59 ? 00:00:00 mdb_pmon_-MGMTDB

root 7756 7727 0 15:02 pts/4 00:00:00 grep pmon_-MGMTDB

[root@rac2 ~]# ps -ef| grep MGMTLSNR

grid 7411 1 014:58 ? 00:00:00/u01/gridsoft/12.1.0/bin/tnslsnr MGMTLSNR -no_crs_notify -inherit

root 7758 7727 0 15:02 pts/4 00:00:00 grep MGMTLSNR

[root@rac2 ~]#

2.2 启动和关闭MGMT 正常情况下，MGMTDB 会在GI 启动的时候，会自动启动，但也可以手工管理，直接使用srvctl 操作即可：
Usage: srvctl start mgmtdb[-startoption <start_option>] [-node <node_name>]

2.3 查看Management Database 的log 和trace 文件
一般情况下，是不需要查看MGMT DB的trace的，如果要查看，用如下命令：
?

1
2
3
4
5
6
7
8
9

[grid@rac2 _mgmtdb]$ pwd

/u01/gridbase/diag/rdbms/_mgmtdb

[grid@rac2 _mgmtdb]$ ls

i_1.mif -MGMTDB

[grid@rac2 _mgmtdb]$

进入$ORACLE_BASE下的trace目录。但是进入-MGMTDB时，要注意，不能直接cd：

?

1
2
3
4
5
6
7

[grid@rac2 _mgmtdb]$ cd -MGMTDB

-bash: cd: -M: invalid option

cd: usage: cd [-L|-P] [dir]

[grid@rac2 _mgmtdb]$

必须使用./-MGMTDB,如：
?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

[grid@rac2 _mgmtdb]$ cd ./-MGMTDB

[grid@rac2 -MGMTDB]$ ls

alert hm incpkg lck metadata metadata_pv sweep

cdump incident ir log metadata_dgif stage trace

[grid@rac2 -MGMTDB]$

[grid@rac2 trace]$ pwd

/u01/gridbase/diag/rdbms/_mgmtdb/-MGMTDB/trace

[grid@rac2 trace]$ ls

alert_-MGMTDB.log -MGMTDB_ckpt_4772.trm -MGMTDB_lgwr_7475.trc -MGMTDB_m001_10288.trm -MGMTDB_ora_10486.trc -MGMTDB_p001_5645.trm

cdmp_20140807064254 -MGMTDB_ckpt_7477.trc -MGMTDB_lgwr_7475.trm -MGMTDB_m001_10330.trc -MGMTDB_ora_10486.trm -MGMTDB_p001_7523.trc

cdmp_20141208110548 -MGMTDB_ckpt_7477.trm -MGMTDB_m000_10101.trc -MGMTDB_m001_10330.trm -MGMTDB_ora_10830.trc -MGMTDB_p001_7523.trm

cdmp_20141208110550 -MGMTDB_dbrm_4764.trc -MGMTDB_m000_10101.trm -MGMTDB_m001_8055.trc -MGMTDB_ora_10830.trm -MGMTDB_rbal_10460.trc

cdmp_20141208110553 -MGMTDB_dbrm_4764.trm -MGMTDB_m000_10202.trc -MGMTDB_m001_8055.trm -MGMTDB_ora_3770.trc -MGMTDB_rbal_10460.trm

cdmp_20141208110555 -MGMTDB_dbrm_7469.trc -MGMTDB_m000_10202.trm -MGMTDB_mark_10484.trc -MGMTDB_ora_3770.trm -MGMTDB_rbal_4782.trc

MGMT DB 的日志和trace 都在这个里。

3 MGMTDB是带一个PDB的CDB数据库
前面说了，MGMTDB 是一个实例，实际上，MGMTDB是带一个PDB的CDB库，我们可以使用GI的命令直接去操作MGMTDB 对应的PDB。

?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103

--查看MGMTDB当前节点：

[grid@rac2 /]$ oclumon manage -get master

Master = rac1

--查看状态：

[grid@rac2 /]$ srvctl status mgmtdb

Database is enabled

Instance -MGMTDB is running on node rac2

--查看配置信息：

[grid@rac2 /]$ srvctl config mgmtdb

Database unique name: _mgmtdb

Database name:

Oracle home: /u01/gridsoft/12.1.0

Oracle user: grid

Spfile:+OCR_VOTING/_mgmtdb/spfile-MGMTDB.ora

Password file:

Domain:

Start options: open

Stop options: immediate

Database role: PRIMARY

Management policy: AUTOMATIC

Database instance: -MGMTDB

Type: Management

--连接MGMTDB实例

[grid@rac2 /]$ export ORACLE_SID=-MGMTDB

[grid@rac2 /]$ sqlplus / as sysdba

SQL*Plus: Release 12.1.0.1.0 Production onMon Dec 8 15:24:37 2014

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:

Oracle Database 12c Enterprise EditionRelease 12.1.0.1.0 - 64bit Production

With the Partitioning, Automatic StorageManagement and Advanced Analytics options

SQL> select file_name fromdba_data_files union select member file_name from V$logfile;

FILE_NAME

--------------------------------------------------------------------------------

+OCR_VOTING/_MGMTDB/DATAFILE/sysaux.258.854939615

+OCR_VOTING/_MGMTDB/DATAFILE/sysgridhomedata.261.854939891

+OCR_VOTING/_MGMTDB/DATAFILE/sysmgmtdata.260.854939737

+OCR_VOTING/_MGMTDB/DATAFILE/system.259.854939661

+OCR_VOTING/_MGMTDB/DATAFILE/undotbs1.257.854939605

+OCR_VOTING/_MGMTDB/ONLINELOG/group_1.263.854940051

+OCR_VOTING/_MGMTDB/ONLINELOG/group_2.264.854940053

+OCR_VOTING/_MGMTDB/ONLINELOG/group_3.265.854940057

8 rows selected.

这里查询的是MGMTDB的路径，也可以直接用如下命令查询：
?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

[grid@rac2 /]$ oclumon manage -get reppath

CHM Repository Path =+OCR_VOTING/_MGMTDB/DATAFILE/sysmgmtdata.260.854939737

[grid@rac2 /]$

--查询MGMTDB用户：

SQL> select username,account_status fromdba_users where username like 'CH%';

USERNAME ACCOUNT_STATUS

------------- ----------------

CHM OPEN

CHA OPEN

帐号		自动登录	找回密码
密码			注册

Oracle 12cRAC MGMTDB是什么

Oracle 12cRAC MGMTDB是什么