Home > Database > Mysql Tutorial > body text

oracle 10g RAC 添加日志组和成员以及删除日志成员

WBOY
Release: 2016-06-07 15:50:38
Original
1515 people have browsed it

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';


Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!