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From liugangc <liuga...@gmail.com>
Subject Re:RE: Compound file don't work with lucene 3.3 or 3.4
Date Mon, 21 Nov 2011 02:12:38 GMT
thanks for uwe's answer. 


--
gang liu
email: liugangc@gmail.com



At 2011-11-20 17:44:06,"Uwe Schindler" <uwe@thetaphi.de> wrote:
>Hi,
>
>Lucene only uses CFS for very small segments, that don't exceed a specific
>percentage of the index size. See the method LogMergePolicy.setNoCFSRatio
>[http://lucene.apache.org/java/3_4_0/api/all/org/apache/lucene/index/LogMerg
>ePolicy.html#setNoCFSRatio(double)].
>
>The default is 10%, every segment larger than 0.1 of total index size will
>not be made compound:
>[http://lucene.apache.org/java/3_4_0/api/all/org/apache/lucene/index/LogMerg
>ePolicy.html#DEFAULT_NO_CFS_RATIO]
>
>In general for merge performance reason you should not change those values,
>unless you are running out of file descriptors! If you have a static index
>that never changes (e.g. that will be hosted on a CD-ROM), you can
>forceMerge(1) it to one single segment with CFSRatio=1.0, in all other cases
>it's not a good idea, especially if you do realtime indexing; in that case
>you should use the new TieredMergePolicy not the old LogMergePolicy.
>
>Uwe
>
>-----
>Uwe Schindler
>H.-H.-Meier-Allee 63, D-28213 Bremen
>http://www.thetaphi.de
>eMail: uwe@thetaphi.de
>
>
>> -----Original Message-----
>> From: liugang [mailto:liugangc@gmail.com]
>> Sent: Sunday, November 20, 2011 5:30 AM
>> To: java-user@lucene.apache.org
>> Subject: Compound file don't work with lucene 3.3 or 3.4
>> 
>> I use lucene 3.4 in my search app.  in default config, after indexing, my
>index
>> dir has several file such as *.tii, *.tis ..., and cfs file doesn't exist.
>> 
>> Then I use setUseCompoundFile(true) of logByteSizeMergePolicy, and result
>is
>> same.
>> 
>> I remember it's good with lucene 2.x.  has anybody same problem?
>Appreciate
>> for any response.
>> 
>> 发自我的 iPad
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