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<HEAD><TITLE>论坛精华 >> Oracle 专栏 >> A 7-11 Dropping Online Redo Log Groups and Members</title>
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>> A 7-11 Dropping Online Redo Log Groups and Members [<a href=http://www.jsp001.com/forum/showthread.php?goto=newpost&threadid=575>查看别人的评论</a>]<br>
<hr><p>由 macro 发布于: 2001-03-02 22:04</p><p> </p><p>eg.<br><br>ALTER DATABASE DROP LOGFILE GROUP 3;<br><br>Restrictions:<br><br>1.An instance requires at least two groups of online redo log files.<br><br>2.An active or current group cannot be dropped.<br><br>3.If the database is running the ARCHIVELOG mode and the log file group is not archived,then the group cannot be dropped.<br><br>4.Wehn an online redo log group is dropped , the operating system files are <font color=red>not deleted</font>.</p><hr><p>由 macro 发布于: 2001-03-02 22:11</p><p> </p><p>You may want to drop an online redo log member because it has a status of INVALID.<br><br>eg.<br><br>ALTER DATABASE DROP LOGFILE MEMBER '/DISK4/log2b.dbf';<br><br><br>Restrictions:<br><br>1. If the member you want to drop is the last valid member of the group , you cannot drop the member.<br><br>2.If the group is current,you must force a log file switch before you can drop the member.<br><br>3.If the database is running in ARCHIVELOG mode and the log file group to which the member belones is not archived,then the member cannot be dropped.<br><br>4.When an online redo log member is dropped , the operating system files are not deleted.</p></td>
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