# Which class file trigger writing of segments.gen / segments\_1 **URL:** \ **Category:** Elasticsearch\ **Created:** [August 29, 2014, 12:38pm UTC](https://discuss.elastic.co/t/which-class-file-trigger-writing-of-segments-gen-segments-1/19528 "2014-08-29T12:38:30Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Jason\_Wee](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Jason\_Wee](https://discuss.elastic.co/u/Jason_Wee)\ **Post date:** [August 29, 2014, 12:38pm UTC](https://discuss.elastic.co/t/which-class-file-trigger-writing-of-segments-gen-segments-1/19528/1 "2014-08-29T12:38:30Z")
Hello people, Anybody know which class/component in elastic search trigger writing of segments.gen and segments\_1? I'm currently using elastic search version 1.2.1. It would be great if you can provide link pin point which line in the class does that. Thank you. /Jason -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [August 29, 2014, 12:49pm UTC](https://discuss.elastic.co/t/which-class-file-trigger-writing-of-segments-gen-segments-1/19528/2 "2014-08-29T12:49:55Z")
This is Lucene, when indexing starts. Look at the SegmentsInfo class [https://lucene.apache.org/core/4\_9\_0/core/org/apache/lucene/index/SegmentInfos.html](https://lucene.apache.org/core/4_9_0/core/org/apache/lucene/index/SegmentInfos.html) Jörg On Fri, Aug 29, 2014 at 2:38 PM, Jason Wee [peichieh@gmail.com](mailto:peichieh@gmail.com) wrote: > Hello people, > > Anybody know which class/component in Elasticsearch trigger writing > of segments.gen and segments\_1? I'm currently using Elasticsearch version > 1.2.1. It would be great if you can provide link pin point which line in > the class does that. > > Thank you. > > /Jason > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Jason\_Wee](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Jason\_Wee](https://discuss.elastic.co/u/Jason_Wee)\ **Post date:** [August 29, 2014, 3:30pm UTC](https://discuss.elastic.co/t/which-class-file-trigger-writing-of-segments-gen-segments-1/19528/3 "2014-08-29T15:30:12Z")
Thanks Jörg, read this link [https://lucene.apache.org/core/4\_8\_1/core/org/apache/lucene/index/SegmentInfos.html](https://lucene.apache.org/core/4_8_1/core/org/apache/lucene/index/SegmentInfos.html) , very informative. Found a few spots that call the class SegmentInfos, below are them. > > > > > I understand that both segments file are written by Lucene but during index, do you know which class in elasticsearch that eventually lead to trigger the underlying writing of segments file? /Jason On Fri, Aug 29, 2014 at 8:49 PM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \< [joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote: > This is Lucene, when indexing starts. Look at the SegmentsInfo class > [SegmentInfos (Lucene 4.9.0 API)](https://lucene.apache.org/core/4_9_0/core/org/apache/lucene/index/SegmentInfos.html) > > Jörg > > On Fri, Aug 29, 2014 at 2:38 PM, Jason Wee [peichieh@gmail.com](mailto:peichieh@gmail.com) wrote: > > > Hello people, > > > > Anybody know which class/component in Elasticsearch trigger writing > > of segments.gen and segments\_1? I'm currently using Elasticsearch version > > 1.2.1. It would be great if you can provide link pin point which line in > > the class does that. > > > > Thank you. > > > > /Jason > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com) > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAHO4itx9BQfQN2f0JLwwUi4kKupohF1Otxh1\_s31t40QeZbcPg%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAHO4itx9BQfQN2f0JLwwUi4kKupohF1Otxh1_s31t40QeZbcPg%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [August 29, 2014, 4:07pm UTC](https://discuss.elastic.co/t/which-class-file-trigger-writing-of-segments-gen-segments-1/19528/4 "2014-08-29T16:07:38Z")
All the classes in ES that create documents and indices are able to be involved into calling SegmentInfos. Jörg On Fri, Aug 29, 2014 at 5:30 PM, Jason Wee [peichieh@gmail.com](mailto:peichieh@gmail.com) wrote: > Thanks Jörg, > > read this link > [SegmentInfos (Lucene 4.8.1 API)](https://lucene.apache.org/core/4_8_1/core/org/apache/lucene/index/SegmentInfos.html) > , very informative. > > Found a few spots that call the class SegmentInfos, below are them. > > [https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/gateway/local/LocalIndexShardGateway.java](https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/gateway/local/LocalIndexShardGateway.java) > > [https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/common/lucene/Lucene.java](https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/common/lucene/Lucene.java) > > [https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/engine/internal/InternalEngine.java](https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/engine/internal/InternalEngine.java) > > [https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/merge/policy/ElasticsearchMergePolicy.java](https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/merge/policy/ElasticsearchMergePolicy.java) > > [https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/snapshots/blobstore/BlobStoreIndexShardRepository.java](https://github.com/elasticsearch/elasticsearch/blob/v1.2.1/src/main/java/org/elasticsearch/index/snapshots/blobstore/BlobStoreIndexShardRepository.java) > > I understand that both segments file are written by Lucene but during > index, do you know which class in elasticsearch that eventually lead to > trigger the underlying writing of segments file? > > /Jason > > On Fri, Aug 29, 2014 at 8:49 PM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \< > [joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote: > > > This is Lucene, when indexing starts. Look at the SegmentsInfo class > > [SegmentInfos (Lucene 4.9.0 API)](https://lucene.apache.org/core/4_9_0/core/org/apache/lucene/index/SegmentInfos.html) > > > > Jörg > > > > On Fri, Aug 29, 2014 at 2:38 PM, Jason Wee [peichieh@gmail.com](mailto:peichieh@gmail.com) wrote: > > > > > Hello people, > > > > > > Anybody know which class/component in Elasticsearch trigger writing > > > of segments.gen and segments\_1? I'm currently using Elasticsearch version > > > 1.2.1. It would be great if you can provide link pin point which line in > > > the class does that. > > > > > > Thank you. > > > > > > /Jason > > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "elasticsearch" group. > > > To unsubscribe from this group and stop receiving emails from it, send > > > an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > > To view this discussion on the web visit > > > [https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com) > > > [https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/bdfc3860-cb26-4f21-9597-4f500eb950e2%40googlegroups.com?utm_medium=email&utm_source=footer) > > > . > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com) > > [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoG%3Ddauci86-7Y-RaN%2BJW94kqXU%3DwTA3kgxLO5Mj%3DLL0aQ%40mail.gmail.com?utm_medium=email&utm_source=footer) > > . > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/CAHO4itx9BQfQN2f0JLwwUi4kKupohF1Otxh1\_s31t40QeZbcPg%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAHO4itx9BQfQN2f0JLwwUi4kKupohF1Otxh1_s31t40QeZbcPg%40mail.gmail.com) > [https://groups.google.com/d/msgid/elasticsearch/CAHO4itx9BQfQN2f0JLwwUi4kKupohF1Otxh1\_s31t40QeZbcPg%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAHO4itx9BQfQN2f0JLwwUi4kKupohF1Otxh1_s31t40QeZbcPg%40mail.gmail.com?utm_medium=email&utm_source=footer) > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEeVZS76RDc-goD6C1L04csNc-LiaxfbQsJ5PQvAkUz%2Bg%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAKdsXoEeVZS76RDc-goD6C1L04csNc-LiaxfbQsJ5PQvAkUz%2Bg%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:05am UTC](https://discuss.elastic.co/t/which-class-file-trigger-writing-of-segments-gen-segments-1/19528/5 "2017-07-06T01:05:27Z")