在RAC环境中如何管理日志(redolog file)组

Tuesday, 2004-09-14 11:52 Eygle

原文连接:

http://www.eygle.com/faq/How.To.Mangement.redologfile.in.Rac.Raw.htm

本文简单介绍在RAC裸设备环境下如何管理日志文件(redolog file)

本文环境:Oracle9i Rac + VCS4.0 + VxVM4.0 + Solaris9.0 + SunFire210

1.首先可以查看当前裸设备情况

# vxprint

Disk group: oradg

TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0

dg oradg oradg - - - - - -

dm oradg01 c2t0d2s2 - 244143872 - - - -

v ctlfile1 gen ENABLED 204800 - ACTIVE - -

pl ctlfile1-01 ctlfile1 ENABLED 204800 - ACTIVE - -

sd oradg01-13 ctlfile1-01 ENABLED 204800 0 - - -

v ctlfile2 gen ENABLED 204800 - ACTIVE - -

pl ctlfile2-01 ctlfile2 ENABLED 204800 - ACTIVE - -

sd oradg01-14 ctlfile2-01 ENABLED 204800 0 - - -

v redo101 gen ENABLED 204800 - ACTIVE - -

pl redo101-01 redo101 ENABLED 204800 - ACTIVE - -

sd oradg01-04 redo101-01 ENABLED 204800 0 - - -

v redo102 gen ENABLED 204800 - ACTIVE - -

pl redo102-01 redo102 ENABLED 204800 - ACTIVE - -

sd oradg01-05 redo102-01 ENABLED 204800 0 - - -

v redo103 gen ENABLED 204800 - ACTIVE - -

pl redo103-01 redo103 ENABLED 204800 - ACTIVE - -

sd oradg01-06 redo103-01 ENABLED 204800 0 - - -

v redo201 gen ENABLED 204800 - ACTIVE - -

pl redo201-01 redo201 ENABLED 204800 - ACTIVE - -

sd oradg01-07 redo201-01 ENABLED 204800 0 - - -

v redo202 gen ENABLED 204800 - ACTIVE - -

pl redo202-01 redo202 ENABLED 204800 - ACTIVE - -

sd oradg01-08 redo202-01 ENABLED 204800 0 - - -

v redo203 gen ENABLED 204800 - ACTIVE - -

pl redo203-01 redo203 ENABLED 204800 - ACTIVE - -

sd oradg01-09 redo203-01 ENABLED 204800 0 - - -

v spfile gen ENABLED 204800 - ACTIVE - -

pl spfile-01 spfile ENABLED 204800 - ACTIVE - -

sd oradg01-12 spfile-01 ENABLED 204800 0 - - -

v srvcfg gen ENABLED 1024000 - ACTIVE - -

pl srvcfg-01 srvcfg ENABLED 1024000 - ACTIVE - -

sd oradg01-15 srvcfg-01 ENABLED 1024000 0 - - -

v system gen ENABLED 1638400 - ACTIVE - -

pl system-01 system ENABLED 1638400 - ACTIVE - -

sd oradg01-01 system-01 ENABLED 1638400 0 - - -

v temp gen ENABLED 2048000 - ACTIVE - -

pl temp-01 temp ENABLED 2048000 - ACTIVE - -

sd oradg01-02 temp-01 ENABLED 2048000 0 - - -

v undo11 gen ENABLED 16777216 - ACTIVE - -

pl undo11-01 undo11 ENABLED 16777216 - ACTIVE - -

sd oradg01-10 undo11-01 ENABLED 2048000 0 - - -

sd oradg01-17 undo11-01 ENABLED 14729216 2048000 - - -

v undo21 gen ENABLED 2048000 - ACTIVE - -

pl undo21-01 undo21 ENABLED 2048000 - ACTIVE - -

sd oradg01-11 undo21-01 ENABLED 2048000 0 - - -

v users gen ENABLED 16777216 - ACTIVE - -

pl users-01 users ENABLED 16777216 - ACTIVE - -

sd oradg01-03 users-01 ENABLED 2048000 0 - - -

sd oradg01-16 users-01 ENABLED 14729216 2048000 - - -

2.分配新的裸设备并设置相应的权限

这一步需要以root身份执行

# vxassist -g oradg -U gen make redo104 100m

# vxassist -g oradg -U gen make redo105 100m

# vxedit -g oradg set user=oracle mode=644 redo104

# vxedit -g oradg set user=oracle mode=644 redo105

3.重新规划redolog file组

$ sqlplus "/ as sysdba"

SQL*Plus: Release 9.2.0.4.0 - Production on Tue Sep 14 10:02:47 2004

Connected to:

Oracle9i Enterprise Edition Release 9.2.0.4.0 - 64bit Production

With the Real Application Clusters option

JServer Release 9.2.0.4.0 - Production

SQL> set linesize 120

SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM

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

1 1 6313 52428800 1 NO ACTIVE 3193855 14-SEP-04

2 1 6312 52428800 1 NO INACTIVE 3191691 14-SEP-04

5 1 6314 52428800 1 NO CURRENT 3196041 14-SEP-04

3 2 17 10485760 1 NO CURRENT 3016310 14-SEP-04

4 2 16 10485760 1 NO INACTIVE 1619198 13-SEP-04

SQL> alter database add logfile thread 1 group 6 ('/dev/vx/rdsk/oradg/redo104') size 90M;

Database altered.

SQL> alter database add logfile thread 1 group 7 ('/dev/vx/rdsk/oradg/redo105') size 90M;

Database altered.

SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM

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

1 1 6316 52428800 1 NO INACTIVE 3200415 14-SEP-04

2 1 6315 52428800 1 NO INACTIVE 3198233 14-SEP-04

5 1 6317 52428800 1 NO ACTIVE 3202621 14-SEP-04

6 1 6318 94371840 1 NO CURRENT 3204811 14-SEP-04

7 1 0 94371840 1 YES UNUSED 0

3 2 17 10485760 1 NO CURRENT 3016310 14-SEP-04

4 2 16 10485760 1 NO INACTIVE 1619198 13-SEP-04

7 rows selected.

SQL> alter database drop logfile group 5;

Database altered.

SQL> alter database add logfile thread 1 group 5 ('/dev/vx/rdsk/oradg/redo103') size 90M;

Database altered.

....

SQL> select *from v$log;

GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM

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

1 1 6327 94371840 1 NO INACTIVE 3238534 14-SEP-04

2 1 6329 94371840 1 NO CURRENT 3246417 14-SEP-04

5 1 0 94371840 1 YES UNUSED 0

6 1 6328 94371840 1 NO ACTIVE 3242482 14-SEP-04

7 1 6326 94371840 1 NO INACTIVE 3234597 14-SEP-04

3 2 17 10485760 1 NO CURRENT 3016310 14-SEP-04

4 2 16 10485760 1 NO INACTIVE 1619198 13-SEP-04

7 rows selected.