oracle10gRAC添加日志组和成员以及删除日志成员

SQL alter database add logfile thread 1 group5('+data/myrac/onlinelog/myrac1_redolog_group5_01') size 100m; SQL alter database add logfilemember '+data/myrac/onlinelog/myrac1_redolog_group5_02' to group 5; SQL alter database add logfile th

SQL> alter database add logfile thread 1 group5('+data/myrac/onlinelog/myrac1_redolog_group5_01') size 100m;

SQL> alter database add logfile member '+data/myrac/onlinelog/myrac1_redolog_group5_02' to group 5;

SQL> alter database add logfile thread 2 group 6('+data/myrac/onlinelog/myrac1_redolog_group6_01')size 100m;

手误 添加错了名字

先增加成员再说

SQL> alter database add logfile member '+data/myrac/onlinelog/myrac1_redolog_group6_02' to group 6;

SQL> alter database add logfile member '+data/myrac/onlinelog/myrac1_redolog_group6_01' to group 6;

删除不了

SQL> alter database drop logfile member'+DATA/myrac/onlinelog/myrac1_redolog_group6_01';

alter database drop logfile member'+DATA/myrac/onlinelog/myrac1_redolog_group6_01'

*

第 1 行出现错误:

ORA-00362: 要求输入成员以组成组 6 中的有效日志文件

ORA-01517: 日志成员: '+DATA/myrac/onlinelog/myrac1_redolog_group6_01'

日志状态 未使用当中啊!

SQL> select group#,archived,status from v$log;

GROUP# ARC STATUS

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

1 NO ACTIVE

2 NO INACTIVE

3 NO CURRENT

4 NO INACTIVE

5 NO CURRENT

6 YES UNUSED

已选择6行。

在节点2 实例2数据库实例上 切换日志

SQL> alter system switch logfile;

??????

SQL> /

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

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

1 1 87 52428800 1 NO INACTIVE 4427645 25-9月 -12

2 1 86 52428800 1 NO INACTIVE 4356268 25-9月 -12

3 2 43 52428800 1 NO ACTIVE 4402972 25-9月 -12

4 2 42 52428800 1 NO INACTIVE 4206757 24-9月 -12

5 1 88 104857600 2 NO CURRENT 4495802 26-9月 -12

6 2 44 104857600 3 NO CURRENT 4497190 26-9月 -12

已选择6行。

SQL> alter system switch logfile;

??????

SQL> /

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

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

1 1 87 52428800 1 NO INACTIVE 4427645 25-9月 -12

2 1 86 52428800 1 NO INACTIVE 435626825-9月 -12

3 2 43 52428800 1 NO ACTIVE 4402972 25-9月 -12

4 2 45 52428800 1 NO CURRENT 4497215 26-9月 -12

5 1 88 104857600 2 NO CURRENT 4495802 26-9月 -12

6 2 44 104857600 3 NO ACTIVE 4497190 26-9月 -12

已选择6行。

SQL> alter system switch logfile;

??????

SQL> /

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

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

1 1 87 52428800 1 NO INACTIVE 4427645 25-9月 -12

2 1 86 52428800 1 NO INACTIVE 4356268 25-9月 -12

3 2 46 52428800 1 NO CURRENT 4497279 26-9月 -12

4 2 45 52428800 1 NO INACTIVE 449721526-9月 -12

5 1 88 104857600 2 NO CURRENT 4495802 26-9月 -12

6 2 44 104857600 3 NO INACTIVE 4497190 26-9月 -12

已选择6行。

SQL> alter database droplogfile member '+DATA/myrac/onlinelog/myrac1_redolog_group6_01';

数据库已更改。

SQL> select group#,member from v$logfile where group#=6;

GROUP# MEMBER

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

6+DATA/myrac/onlinelog/myrac2_redolog_group6_02

6+DATA/myrac/onlinelog/myrac2_redolog_group6_01

已经成功删除了

下面去ASMCMD删除物理文件

ASMCMD> ls

group_1.257.772910379

group_2.258.772910389

group_3.265.772919275

group_4.266.772919281

group_5.268.795028735

group_5.269.795029891

group_6.270.795030293

group_6.271.795030355

group_6.272.795030429

myrac1_redolog_group5_01

myrac1_redolog_group5_02

myrac1_redolog_group6_01

myrac2_redolog_group6_01

myrac2_redolog_group6_02

ls –ls 可以看到 别名关联

ASMCMD> pp

commands:

--------

cd

du

find

help

ls

lsct

lsdg

mkalias

mkdir

pwd

rm

rmalias

ASMCMD> rm myrac1_redolog_group6_01

ASMCMD> ls

group_1.257.772910379

group_2.258.772910389

group_3.265.772919275

group_4.266.772919281

group_5.268.795028735

group_5.269.795029891

group_6.271.795030355

group_6.272.795030429

myrac1_redolog_group5_01

myrac1_redolog_group5_02

myrac2_redolog_group6_01

myrac2_redolog_group6_02

ASMCMD>

下面介绍关于日志一些原则：

原则：删除前必须遵守如下原则，每个实例必须至少有两个日志组；当一个组处于ACTIVE或者CURRENT的状态时不可删除；删除日志组的操作只对数据库进行更改，操作系统的文件尚未删除；当删除时适用DROP LOGFILE GROUP N语句时，此时GROUP N内的所有成员都将被删除。

ALTER DATABASE DROP LOGFILE GROUP N；

删除日志成员的原则：当你删除一个是该组中最后一个成员的时候，你不能删除此成员；当组的转台处于current的状态时，不能删除组成员；在归档模式下，必须得归档之后才能删除；删除日志组成员的操作只对数据库进行更改，操作系统的文件尚未删除

ALTER DATABASE DROP LOGFILE MEMBER '/LOCATION_DUST/REDO0N_N.LOG';