FAQ
Hi Lucene Team,

If you know or if there is any way of splitting Lucene indexing segments to smaller segments of size less than 1 GB, can you please know me?
Here I am giving one index segments sizes, total size of index is 9.7 GB, here there are three Lucene files a) _12r7.prx b) _kft.prx c) _ls6.prx of size greater than 1 GB.
I want to split them to different pieces and want to reduce their size.

[root@sc-s1-172-1.oxford.com ~]# ls -lh /index/TP_0000000000000000499/
total 9.7G
-rw-r--r-- 1 appuser appuser 80M Jul 27 13:53 _12r7.fdt
-rw-r--r-- 1 appuser appuser 1.4M Jul 27 13:53 _12r7.fdx
-rw-r--r-- 1 appuser appuser 397 Jul 27 13:53 _12r7.fnm
-rw-r--r-- 1 appuser appuser 649M Jul 27 13:58 _12r7.frq
-rw-r--r-- 1 appuser appuser 3.9M Jul 27 13:58 _12r7.nrm
-rw-r--r-- 1 appuser appuser 2.2G Jul 27 13:58 _12r7.prx
-rw-r--r-- 1 appuser appuser 33 Jul 27 13:58 _12r7.stats
-rw-r--r-- 1 appuser appuser 334K Jul 27 13:58 _12r7.tii
-rw-r--r-- 1 appuser appuser 28M Jul 27 13:58 _12r7.tis
-rw-r--r-- 1 appuser appuser 24K Jul 27 14:44 _12ts.fdt
-rw-r--r-- 1 appuser appuser 400 Jul 27 14:44 _12ts.fdx
-rw-r--r-- 1 appuser appuser 361 Jul 27 14:44 _12ts.fnm
-rw-r--r-- 1 appuser appuser 90K Jul 27 14:44 _12ts.frq
-rw-r--r-- 1 appuser appuser 1.1K Jul 27 14:44 _12ts.nrm
-rw-r--r-- 1 appuser appuser 218K Jul 27 14:44 _12ts.prx
-rw-r--r-- 1 appuser appuser 25 Jul 27 14:44 _12ts.stats
-rw-r--r-- 1 appuser appuser 8.7K Jul 27 14:44 _12ts.tii
-rw-r--r-- 1 appuser appuser 656K Jul 27 14:44 _12ts.tis
-rw-r--r-- 1 appuser appuser 309K Jul 27 14:44 _12tt.fdt
-rw-r--r-- 1 appuser appuser 5.1K Jul 27 14:44 _12tt.fdx
-rw-r--r-- 1 appuser appuser 361 Jul 27 14:44 _12tt.fnm
-rw-r--r-- 1 appuser appuser 1.9M Jul 27 14:44 _12tt.frq
-rw-r--r-- 1 appuser appuser 14K Jul 27 14:44 _12tt.nrm
-rw-r--r-- 1 appuser appuser 3.7M Jul 27 14:44 _12tt.prx
-rw-r--r-- 1 appuser appuser 29 Jul 27 14:44 _12tt.stats
-rw-r--r-- 1 appuser appuser 38K Jul 27 14:44 _12tt.tii
-rw-r--r-- 1 appuser appuser 2.6M Jul 27 14:44 _12tt.tis
-rw-r--r-- 1 appuser appuser 62M Jul 15 19:51 _kft.fdt
-rw-r--r-- 1 appuser appuser 1.3M Jul 15 19:51 _kft.fdx
-rw-r--r-- 1 appuser appuser 397 Jul 15 19:51 _kft.fnm
-rw-r--r-- 1 appuser appuser 626M Jul 15 20:40 _kft.frq
-rw-r--r-- 1 appuser appuser 3.5M Jul 15 20:40 _kft.nrm
-rw-r--r-- 1 appuser appuser 2.6G Jul 15 20:40 _kft.prx
-rw-r--r-- 1 appuser appuser 31 Jul 15 20:40 _kft.stats
-rw-r--r-- 1 appuser appuser 20K Jul 19 23:01 _kft_sv.del
-rw-r--r-- 1 appuser appuser 295K Jul 15 20:40 _kft.tii
-rw-r--r-- 1 appuser appuser 25M Jul 15 20:40 _kft.tis
-rw-r--r-- 1 appuser appuser 6.6K Jul 19 18:32 _ls6_aj.del
-rw-r--r-- 1 appuser appuser 17M Jul 17 18:21 _ls6.fdt
-rw-r--r-- 1 appuser appuser 418K Jul 17 18:21 _ls6.fdx
-rw-r--r-- 1 appuser appuser 397 Jul 17 18:21 _ls6.fnm
-rw-r--r-- 1 appuser appuser 556M Jul 17 19:13 _ls6.frq
-rw-r--r-- 1 appuser appuser 1.2M Jul 17 19:13 _ls6.nrm
-rw-r--r-- 1 appuser appuser 2.9G Jul 17 19:13 _ls6.prx
-rw-r--r-- 1 appuser appuser 31 Jul 17 19:13 _ls6.stats
-rw-r--r-- 1 appuser appuser 155K Jul 17 19:13 _ls6.tii
-rw-r--r-- 1 appuser appuser 14M Jul 17 19:13 _ls6.tis
-rw-r--r-- 1 appuser appuser 20 Jul 27 14:44 segments.gen
-rw-r--r-- 1 appuser appuser 158 Jul 27 14:44 segments_pg5
[root@sc-s1-172-1.oxford.com ~]#

[root@sc-s1-172-1.oxford.com ~]# ls -lh /index/TP_0000000000000000499/ | grep G
total 9.7G
-rw-r--r-- 1 appuser appuser 2.2G Jul 27 13:58 _12r7.prx
-rw-r--r-- 1 appuser appuser 2.6G Jul 15 20:40 _kft.prx
-rw-r--r-- 1 appuser appuser 2.9G Jul 17 19:13 _ls6.prx
[root@sc-s1-172-1.oxford.com ~]#

Regards
Ravi

Search Discussions

  • Uwe Schindler at Jul 27, 2011 at 10:28 am
    Hi,

    See MultiPassIndexSplitter or PKIndexSplitter in Lucene contrib/misc.

    Uwe

    -----
    Uwe Schindler
    H.-H.-Meier-Allee 63, D-28213 Bremen
    http://www.thetaphi.de
    eMail: uwe@thetaphi.de

    -----Original Message-----
    From: Gudi, Ravi Sankar
    Sent: Wednesday, July 27, 2011 11:26 AM
    To: java-user@lucene.apache.org
    Subject: Is There a Way To Split The Lucene Index Segments To Samller Size
    Less Than 1 GB

    Hi Lucene Team,

    If you know or if there is any way of splitting Lucene indexing segments to
    smaller segments of size less than 1 GB, can you please know me?
    Here I am giving one index segments sizes, total size of index is 9.7 GB, here
    there are three Lucene files a) _12r7.prx b) _kft.prx c) _ls6.prx of size greater
    than 1 GB.
    I want to split them to different pieces and want to reduce their size.

    [root@sc-s1-172-1.oxford.com ~]# ls -lh /index/TP_0000000000000000499/
    total 9.7G
    -rw-r--r-- 1 appuser appuser 80M Jul 27 13:53 _12r7.fdt
    -rw-r--r-- 1 appuser appuser 1.4M Jul 27 13:53 _12r7.fdx
    -rw-r--r-- 1 appuser appuser 397 Jul 27 13:53 _12r7.fnm
    -rw-r--r-- 1 appuser appuser 649M Jul 27 13:58 _12r7.frq
    -rw-r--r-- 1 appuser appuser 3.9M Jul 27 13:58 _12r7.nrm
    -rw-r--r-- 1 appuser appuser 2.2G Jul 27 13:58 _12r7.prx
    -rw-r--r-- 1 appuser appuser 33 Jul 27 13:58 _12r7.stats
    -rw-r--r-- 1 appuser appuser 334K Jul 27 13:58 _12r7.tii
    -rw-r--r-- 1 appuser appuser 28M Jul 27 13:58 _12r7.tis
    -rw-r--r-- 1 appuser appuser 24K Jul 27 14:44 _12ts.fdt
    -rw-r--r-- 1 appuser appuser 400 Jul 27 14:44 _12ts.fdx
    -rw-r--r-- 1 appuser appuser 361 Jul 27 14:44 _12ts.fnm
    -rw-r--r-- 1 appuser appuser 90K Jul 27 14:44 _12ts.frq
    -rw-r--r-- 1 appuser appuser 1.1K Jul 27 14:44 _12ts.nrm
    -rw-r--r-- 1 appuser appuser 218K Jul 27 14:44 _12ts.prx
    -rw-r--r-- 1 appuser appuser 25 Jul 27 14:44 _12ts.stats
    -rw-r--r-- 1 appuser appuser 8.7K Jul 27 14:44 _12ts.tii
    -rw-r--r-- 1 appuser appuser 656K Jul 27 14:44 _12ts.tis
    -rw-r--r-- 1 appuser appuser 309K Jul 27 14:44 _12tt.fdt
    -rw-r--r-- 1 appuser appuser 5.1K Jul 27 14:44 _12tt.fdx
    -rw-r--r-- 1 appuser appuser 361 Jul 27 14:44 _12tt.fnm
    -rw-r--r-- 1 appuser appuser 1.9M Jul 27 14:44 _12tt.frq
    -rw-r--r-- 1 appuser appuser 14K Jul 27 14:44 _12tt.nrm
    -rw-r--r-- 1 appuser appuser 3.7M Jul 27 14:44 _12tt.prx
    -rw-r--r-- 1 appuser appuser 29 Jul 27 14:44 _12tt.stats
    -rw-r--r-- 1 appuser appuser 38K Jul 27 14:44 _12tt.tii
    -rw-r--r-- 1 appuser appuser 2.6M Jul 27 14:44 _12tt.tis
    -rw-r--r-- 1 appuser appuser 62M Jul 15 19:51 _kft.fdt
    -rw-r--r-- 1 appuser appuser 1.3M Jul 15 19:51 _kft.fdx
    -rw-r--r-- 1 appuser appuser 397 Jul 15 19:51 _kft.fnm
    -rw-r--r-- 1 appuser appuser 626M Jul 15 20:40 _kft.frq
    -rw-r--r-- 1 appuser appuser 3.5M Jul 15 20:40 _kft.nrm
    -rw-r--r-- 1 appuser appuser 2.6G Jul 15 20:40 _kft.prx
    -rw-r--r-- 1 appuser appuser 31 Jul 15 20:40 _kft.stats
    -rw-r--r-- 1 appuser appuser 20K Jul 19 23:01 _kft_sv.del
    -rw-r--r-- 1 appuser appuser 295K Jul 15 20:40 _kft.tii
    -rw-r--r-- 1 appuser appuser 25M Jul 15 20:40 _kft.tis
    -rw-r--r-- 1 appuser appuser 6.6K Jul 19 18:32 _ls6_aj.del
    -rw-r--r-- 1 appuser appuser 17M Jul 17 18:21 _ls6.fdt
    -rw-r--r-- 1 appuser appuser 418K Jul 17 18:21 _ls6.fdx
    -rw-r--r-- 1 appuser appuser 397 Jul 17 18:21 _ls6.fnm
    -rw-r--r-- 1 appuser appuser 556M Jul 17 19:13 _ls6.frq
    -rw-r--r-- 1 appuser appuser 1.2M Jul 17 19:13 _ls6.nrm
    -rw-r--r-- 1 appuser appuser 2.9G Jul 17 19:13 _ls6.prx
    -rw-r--r-- 1 appuser appuser 31 Jul 17 19:13 _ls6.stats
    -rw-r--r-- 1 appuser appuser 155K Jul 17 19:13 _ls6.tii
    -rw-r--r-- 1 appuser appuser 14M Jul 17 19:13 _ls6.tis
    -rw-r--r-- 1 appuser appuser 20 Jul 27 14:44 segments.gen
    -rw-r--r-- 1 appuser appuser 158 Jul 27 14:44 segments_pg5 [root@sc-s1-
    172-1.oxford.com ~]#

    [root@sc-s1-172-1.oxford.com ~]# ls -lh /index/TP_0000000000000000499/ |
    grep G total 9.7G
    -rw-r--r-- 1 appuser appuser 2.2G Jul 27 13:58 _12r7.prx
    -rw-r--r-- 1 appuser appuser 2.6G Jul 15 20:40 _kft.prx
    -rw-r--r-- 1 appuser appuser 2.9G Jul 17 19:13 _ls6.prx [root@sc-s1-172-
    1.oxford.com ~]#

    Regards
    Ravi

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  • Anshum at Jul 27, 2011 at 10:43 am
    Hi Ravi,
    You could reindex the data and have a sharding mechanism i.e. Open 3 index
    writers, read documents from source and add to the appropriate indexwriter
    to create a sharded index.
    Incase you'd want to avoid the re-indexing due to whatever reasons, you may
    create 3 copies of the index and delete documents basis some criteria
    leaving data/documents for only that shard e.g.
    Index contains docs with ids 1,2,3,4,5,6,7,8,9
    You could create 3 copies, fire a delete on the first one to retain only
    Docs 1,2 and 3.
    Similarly do it for the other 2 shards. Leaving you with 3 indexes.

    On the other hand, why do you want to split a 9G index? Is there a reason?
    performance issue? It'd be good if you could share the reason as the problem
    could be completely different.

    --
    Anshum Gupta
    http://ai-cafe.blogspot.com


    2011/7/27 Gudi, Ravi Sankar <ravisankarg.ravisankarg@hp.com>
    Hi Lucene Team,

    If you know or if there is any way of splitting Lucene indexing segments to
    smaller segments of size less than 1 GB, can you please know me?
    Here I am giving one index segments sizes, total size of index is 9.7 GB,
    here there are three Lucene files a) _12r7.prx b) _kft.prx c) _ls6.prx of
    size greater than 1 GB.
    I want to split them to different pieces and want to reduce their size.

    [root@sc-s1-172-1.oxford.com ~]# ls -lh /index/TP_0000000000000000499/
    total 9.7G
    -rw-r--r-- 1 appuser appuser 80M Jul 27 13:53 _12r7.fdt
    -rw-r--r-- 1 appuser appuser 1.4M Jul 27 13:53 _12r7.fdx
    -rw-r--r-- 1 appuser appuser 397 Jul 27 13:53 _12r7.fnm
    -rw-r--r-- 1 appuser appuser 649M Jul 27 13:58 _12r7.frq
    -rw-r--r-- 1 appuser appuser 3.9M Jul 27 13:58 _12r7.nrm
    -rw-r--r-- 1 appuser appuser 2.2G Jul 27 13:58 _12r7.prx
    -rw-r--r-- 1 appuser appuser 33 Jul 27 13:58 _12r7.stats
    -rw-r--r-- 1 appuser appuser 334K Jul 27 13:58 _12r7.tii
    -rw-r--r-- 1 appuser appuser 28M Jul 27 13:58 _12r7.tis
    -rw-r--r-- 1 appuser appuser 24K Jul 27 14:44 _12ts.fdt
    -rw-r--r-- 1 appuser appuser 400 Jul 27 14:44 _12ts.fdx
    -rw-r--r-- 1 appuser appuser 361 Jul 27 14:44 _12ts.fnm
    -rw-r--r-- 1 appuser appuser 90K Jul 27 14:44 _12ts.frq
    -rw-r--r-- 1 appuser appuser 1.1K Jul 27 14:44 _12ts.nrm
    -rw-r--r-- 1 appuser appuser 218K Jul 27 14:44 _12ts.prx
    -rw-r--r-- 1 appuser appuser 25 Jul 27 14:44 _12ts.stats
    -rw-r--r-- 1 appuser appuser 8.7K Jul 27 14:44 _12ts.tii
    -rw-r--r-- 1 appuser appuser 656K Jul 27 14:44 _12ts.tis
    -rw-r--r-- 1 appuser appuser 309K Jul 27 14:44 _12tt.fdt
    -rw-r--r-- 1 appuser appuser 5.1K Jul 27 14:44 _12tt.fdx
    -rw-r--r-- 1 appuser appuser 361 Jul 27 14:44 _12tt.fnm
    -rw-r--r-- 1 appuser appuser 1.9M Jul 27 14:44 _12tt.frq
    -rw-r--r-- 1 appuser appuser 14K Jul 27 14:44 _12tt.nrm
    -rw-r--r-- 1 appuser appuser 3.7M Jul 27 14:44 _12tt.prx
    -rw-r--r-- 1 appuser appuser 29 Jul 27 14:44 _12tt.stats
    -rw-r--r-- 1 appuser appuser 38K Jul 27 14:44 _12tt.tii
    -rw-r--r-- 1 appuser appuser 2.6M Jul 27 14:44 _12tt.tis
    -rw-r--r-- 1 appuser appuser 62M Jul 15 19:51 _kft.fdt
    -rw-r--r-- 1 appuser appuser 1.3M Jul 15 19:51 _kft.fdx
    -rw-r--r-- 1 appuser appuser 397 Jul 15 19:51 _kft.fnm
    -rw-r--r-- 1 appuser appuser 626M Jul 15 20:40 _kft.frq
    -rw-r--r-- 1 appuser appuser 3.5M Jul 15 20:40 _kft.nrm
    -rw-r--r-- 1 appuser appuser 2.6G Jul 15 20:40 _kft.prx
    -rw-r--r-- 1 appuser appuser 31 Jul 15 20:40 _kft.stats
    -rw-r--r-- 1 appuser appuser 20K Jul 19 23:01 _kft_sv.del
    -rw-r--r-- 1 appuser appuser 295K Jul 15 20:40 _kft.tii
    -rw-r--r-- 1 appuser appuser 25M Jul 15 20:40 _kft.tis
    -rw-r--r-- 1 appuser appuser 6.6K Jul 19 18:32 _ls6_aj.del
    -rw-r--r-- 1 appuser appuser 17M Jul 17 18:21 _ls6.fdt
    -rw-r--r-- 1 appuser appuser 418K Jul 17 18:21 _ls6.fdx
    -rw-r--r-- 1 appuser appuser 397 Jul 17 18:21 _ls6.fnm
    -rw-r--r-- 1 appuser appuser 556M Jul 17 19:13 _ls6.frq
    -rw-r--r-- 1 appuser appuser 1.2M Jul 17 19:13 _ls6.nrm
    -rw-r--r-- 1 appuser appuser 2.9G Jul 17 19:13 _ls6.prx
    -rw-r--r-- 1 appuser appuser 31 Jul 17 19:13 _ls6.stats
    -rw-r--r-- 1 appuser appuser 155K Jul 17 19:13 _ls6.tii
    -rw-r--r-- 1 appuser appuser 14M Jul 17 19:13 _ls6.tis
    -rw-r--r-- 1 appuser appuser 20 Jul 27 14:44 segments.gen
    -rw-r--r-- 1 appuser appuser 158 Jul 27 14:44 segments_pg5
    [root@sc-s1-172-1.oxford.com ~]#

    [root@sc-s1-172-1.oxford.com ~]# ls -lh /index/TP_0000000000000000499/ |
    grep G
    total 9.7G
    -rw-r--r-- 1 appuser appuser 2.2G Jul 27 13:58 _12r7.prx
    -rw-r--r-- 1 appuser appuser 2.6G Jul 15 20:40 _kft.prx
    -rw-r--r-- 1 appuser appuser 2.9G Jul 17 19:13 _ls6.prx
    [root@sc-s1-172-1.oxford.com ~]#

    Regards
    Ravi
  • Mihai Caraman at Jul 27, 2011 at 12:54 pm
    smaller segments of size less than 1 GB, can you please know me?
    As i recall, the optimize mechanism can be told how many segments to create.
    So you can verify your index size and know how many segments to create
    before optimization.

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groupjava-user @
categorieslucene
postedJul 27, '11 at 10:07a
activeJul 27, '11 at 12:54p
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websitelucene.apache.org

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