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启用Block Change Tracking-10g新特性
作者：
eygle |【转载时请以超链接形式标明文章
出处和作者信息及
本声明】
链接：
http://www.eygle.com/archives/2005/03/ooablock_change.html
Block chage tracking是Oracle10g的一个新特性，Block change tracking进程记录自从上一次备份以来数据块的变化，并把这些信息记录在跟踪文件中。RMAN使用这个文件判断增量备份中需要备份的变更数据。这极大的促进了备份性能，RMAN可以不再扫描整个文件以查找变更数据。
启用跟踪可以使用如下命令:
alter database enable block change tracking using
file '/data5/flash_recovery_area/EYGLE/eygle_block_track.log';
|
判断当前设置可以查询:
select filename,status,bytes from v$block_change_tracking;
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关闭跟踪:
alter database disable block change tracking;
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以下步骤供参考:
SYS AS SYSDBA on 29-MAR-05 >alter database enable block change tracking using
2 file '/data5/flash_recovery_area/EYGLE/eygle_block_track.log';
Database altered.
SYS AS SYSDBA on 29-MAR-05 >select filename,status,bytes from v$block_change_tracking;
FILENAME
--------------------------------------------------------------------------------
STATUS BYTES
---------- ----------
/data5/flash_recovery_area/EYGLE/eygle_block_track.log
ENABLED 11599872
SYS AS SYSDBA on 29-MAR-05 >alter database disable block change tracking;
Database altered.
SYS AS SYSDBA on 29-MAR-05 >select filename,status,bytes from v$block_change_tracking;
FILENAME
--------------------------------------------------------------------------------
STATUS BYTES
---------- ----------
DISABLED
|
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启用Block Change Tracking-10g新特性】来自
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By eygle on 2005-03-29 11:57 |
Comments (1) |
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网上相关主题:
请问这个文件会不停的增长下去么？如何维护呢？谢谢！
Posted by: beking1627 at February 22, 2008 11:57 AM
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