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,
<luoc...@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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