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oracle 10g RAC 添加日志组和成员以及删除日志成员

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Release: 2016-06-07 15:50:38
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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';


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