# Recovery process of elasticsearch

**URL:** <https://discuss.elastic.co/t/recovery-process-of-elasticsearch/116526>\
**Category:** Elasticsearch\
**Created:** [January 22, 2018, 7:27pm UTC](https://discuss.elastic.co/t/recovery-process-of-elasticsearch/116526 "2018-01-22T19:27:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fhalde](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/fhalde/32/21419_2.png) [@fhalde](https://discuss.elastic.co/u/fhalde)\
**Post date:** [January 22, 2018, 7:27pm UTC](https://discuss.elastic.co/t/recovery-process-of-elasticsearch/116526/1 "2018-01-22T19:27:10Z")

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Can someone explain how the recovery steps of elasticsearch works?

e.g. when a node comes back up, shards get initialized. I see in cat recovery files files\_percent & translog and translog\_percent

translog recovery makes sense to me [reapply everything in translog], but what is file\_percent? I know each shard is made of many segment files. But what exactly is initialization step of a shard? What operations are performed during initialization? And why is it slow at times?

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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:** [February 19, 2018, 7:27pm UTC](https://discuss.elastic.co/t/recovery-process-of-elasticsearch/116526/2 "2018-02-19T19:27:35Z")

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