Re: problem about backup index file

[luocan19826164]

thanks for your paper,Michael McCandlessI have one quetion about thisFor all 
other files, Lucene is "write once.”This makes doing
incremental backups very easy: Simply compare the file names.Once a
file is written, it will never change; therefore, if you've already
backed up that file, there's no need to copy it again.this means the number of 
files is growing more and more.never getting less.another question:I should 
delete the files previous I backup when I backup again. ----- 原文 ----- 发件人: 
Michael McCandless 主　题: Re: problem about backup index file时　间: 2010年2月25日  
23:19:59This is likely happening because you're attempting to copy a file 
thatIndexWriter is currently writing?You shouldn't do that (copy files that are 
still being written) --that just wastes bytes (they aren't used by the index), 
and causesthis failure on Windows.Instead, you should use 
SnapshotDeletionPolicy -- it tells youspecifically which files make up the 
latest commit point.  Those fileswill not be opened for writing (only for 
reading, if you have anIndexReader open on that commit) and they should copy 
just fine onwindows.The "Hot backups with Lucene" article (NOTE: I'm the 
author) inupcoming Lucene in Action 2 revision shows how to do this -- 
it'savailable for download from http://manning.com/hatcher3.MikeOn Thu, Feb 25, 
2010 at 3:15 AM,  <luocan19826...@sohu.com> wrote:> I want backup my 
index file,but I get the follow error.> 
java.io.IOException: another program lock the file! at 
java.io.FileInputStream.readBytes(Native Method) at 
java.io.FileInputStream.read(Unknown Source) at 
com.common.Utils.copyDirectory(Utils.java:149) at 
com.common.Utils.copyDirectory(Utils.java:138) at 
com.common.Utils.copyDirectory(Utils.java:138) at 
com.index.IndexManager.backDataPolicy(IndexManager.java:398) at 
com.index.IndexManager.indexLoop(IndexManager.java:222) at 
com.Main$1.run(Main.java:48) at java.lang.Thread.run(Unknown 
Source)>  > How can I backup lucene file in IR 
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