# Can anyone help to explain part of code in elasticsearch

**URL:** <https://discuss.elastic.co/t/can-anyone-help-to-explain-part-of-code-in-elasticsearch/55398>\
**Category:** Elasticsearch\
**Created:** [July 13, 2016, 10:43am UTC](https://discuss.elastic.co/t/can-anyone-help-to-explain-part-of-code-in-elasticsearch/55398 "2016-07-13T10:43:48Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\
**Post date:** [July 13, 2016, 10:43am UTC](https://discuss.elastic.co/t/can-anyone-help-to-explain-part-of-code-in-elasticsearch/55398/1 "2016-07-13T10:43:48Z")

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2 method in BalancedShardsAllocator.Balancer  
buildModelFromAssigned  
allocateUnassigned

the code is complicated.

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 14, 2016, 10:17am UTC](https://discuss.elastic.co/t/can-anyone-help-to-explain-part-of-code-in-elasticsearch/55398/2 "2016-07-14T10:17:23Z")

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Can you provide a link to it?

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**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\
**Post date:** [July 14, 2016, 11:24am UTC](https://discuss.elastic.co/t/can-anyone-help-to-explain-part-of-code-in-elasticsearch/55398/3 "2016-07-14T11:24:54Z")

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[https://github.com/elastic/elasticsearch/blob/master/core/src/main/java/org/elasticsearch/cluster/routing/allocation/allocator/BalancedShardsAllocator.java](https://github.com/elastic/elasticsearch/blob/master/core/src/main/java/org/elasticsearch/cluster/routing/allocation/allocator/BalancedShardsAllocator.java)

private void buildModelFromAssigned()  
private boolean allocateUnassigned()

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:35pm UTC](https://discuss.elastic.co/t/can-anyone-help-to-explain-part-of-code-in-elasticsearch/55398/4 "2017-07-05T22:35:38Z")

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