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From Bernd Fehling <bernd.fehl...@uni-bielefeld.de>
Subject questions about the index
Date Mon, 02 May 2011 13:17:34 GMT
Dear list,

some questions about the index.
(questions go to the lucene list because it is more about the index itself)

First my results from CheckIndex:

Segments file=segments_l6 numSegments=1 version=FORMAT_3_1 [Lucene 3.1]
Checking only these segments: _79s:
   1 of 1: name=_79s docCount=28146692
     compound=false
     hasProx=true
     numFiles=8
     size (MB)=141.658,104
     diagnostics = {optimize=true, mergeFactor=2, os.version=2.6.32.13-0.5-xen,
                    os=Linux, lucene.version=3.1.0 1085809 - 2011-03-26 18:06:58,
                    source=merge, os.arch=amd64, java.version=1.6.0_21, java.vendor=Sun Microsystems
Inc.}
     no deletions
     test: open reader.........OK
     test: fields..............OK [106 fields]
     test: field norms.........OK [18 fields]
     ....

Questions:
- the mergeFactor in solrconfig.xml (indexDefaults and mainIndex)
   is set to 10. Why is the index reporting mergeFactor=2 ???

- what does "optimize=true" mean?
   - the index is optimized OR
   - the index needs to get optimized

- if I start solr with an optimized index I always get a "write.lock" file.
   if I use a small index with only a few docs I don't seen this behavior.
   any explanation?

Best regards,
Bernd

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