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使用RMAN将RAC+ASM复制到单实例+ASM上

WBOY
WBOYOriginal
2016-06-07 16:45:06899browse

本次试验将部署到ASM上的双节点RAC复制到单实例的ASM上。该试验也是出自于一个项目的需求,在虚拟机上演练操作特此记录。之前已经

本次试验将部署到ASM上的双节点RAC复制到单实例的ASM上。该试验也是出自于一个项目的需求,,在虚拟机上演练操作特此记录。之前已经做过多次RMAN复制数据库,这次试验的特点是从RAC复制到单实例。需要注意的以下内容:

1,spfile参数问题
RAC下的spfile参数中记录了很多和集群相关的信息,在复制时需要修改。比如
*.cluster_database=true
PROD2.instance_number=2
PROD1.instance_number=1
*.remote_listener='cluster-scan:1521'
PROD2.thread=2
PROD1.thread=1
PROD2.undo_tablespace='UNDOTBS2'
PROD1.undo_tablespace=‘UNDOTBS1’
和RAC相关的信息可以选择注释掉,或者删除。

2,undo表空间问题
双节点RAC的备份集中会产生2个undo表空间及其数据文件,而单实例数据库只需要一个undo表空间。使用RAC的备份集在单实例数据库上恢复后,可以手工删除多余的那个undo表空间及其数据文件,通常是undotbs2

3,redo问题
双节点RAC的控制文件的备份中记录的是两个实例的redo信息,恢复完成后在open resetlogs打开数据库后回创建出thread2的online redo log,也就是节点2的联机日志。同undotbs2的处理原则一样,删除之。


1,RAC 端rman全备数据库到/backup目录下。

[Oracle@node1 ~]$ rman target /

Recovery Manager: Release 11.2.0.4.0 - Production on Mon Sep 29 03:15:49 2014

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PROD (DBID=271163854)

RMAN> run{
2> allocate channel c1 type disk;
3> allocate channel c2 type disk;
4> backup tag 'full' format '/backup/full_%U.bak'
5> database include current controlfile;
6> sql 'alter system archive log current';
7> backup tag 'arch' format '/backup/arch_%U.arc'
8> archivelog all;
9> release channel c1;
10> release channel c2;
11> }

RMAN> list backup;

List of Backup Sets
===================

BS Key  Type LV Size      Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
43      Full    522.99M    DISK        00:00:04    2014-09-29 03:05:29
        BP Key: 43  Status: AVAILABLE  Compressed: NO  Tag: FULL
        Piece Name: /backup/full_1bpjmdbl_1_1.bak
  List of Datafiles in backup set 43
  File LV Type Ckp SCN    Ckp Time            Name
  ---- -- ---- ---------- ------------------- ----
  2      Full 1298717    2014-09-29 03:05:25 +DATA/prod/datafile/sysaux.257.859325451
  4      Full 1298717    2014-09-29 03:05:25 +DATA/prod/datafile/users.259.859325451
  5      Full 1298717    2014-09-29 03:05:25 +DATA/prod/datafile/example.264.859325525
  6      Full 1298717    2014-09-29 03:05:25 +DATA/prod/datafile/undotbs2.265.859325695

BS Key  Type LV Size      Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
44      Full    649.16M    DISK        00:00:04    2014-09-29 03:05:29
        BP Key: 44  Status: AVAILABLE  Compressed: NO  Tag: FULL
        Piece Name: /backup/full_1cpjmdbl_1_1.bak
  List of Datafiles in backup set 44
  File LV Type Ckp SCN    Ckp Time            Name
  ---- -- ---- ---------- ------------------- ----
  1      Full 1298719    2014-09-29 03:05:25 +DATA/prod/datafile/system.256.859325451
  3      Full 1298719    2014-09-29 03:05:25 +DATA/prod/datafile/undotbs1.258.859325451
  7      Full 1298719    2014-09-29 03:05:25 +DATA/prod/datafile/goldengate.269.859338811

BS Key  Type LV Size      Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
45      Full    80.00K    DISK        00:00:00    2014-09-29 03:05:32
        BP Key: 45  Status: AVAILABLE  Compressed: NO  Tag: FULL
        Piece Name: /backup/full_1epjmdbs_1_1.bak         

  SPFILE Included: Modification time: 2014-09-29 02:02:18 
  SPFILE db_unique_name: PROD

BS Key  Type LV Size      Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
46      Full    17.80M    DISK        00:00:01    2014-09-29 03:05:33
        BP Key: 46  Status: AVAILABLE  Compressed: NO  Tag: FULL
        Piece Name: /backup/full_1dpjmdbs_1_1.bak           

  Control File Included: Ckp SCN: 1298731      Ckp time: 2014-09-29 03:05:32

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