# Elasticsearch CCR synchronization

**URL:** <https://discuss.elastic.co/t/elasticsearch-ccr-synchronization/294902>\
**Category:** Elasticsearch\
**Tags:** ccr-cross-cluster-replication\
**Created:** [January 20, 2022, 7:43am UTC](https://discuss.elastic.co/t/elasticsearch-ccr-synchronization/294902 "2022-01-20T07:43:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fabry](https://avatars.discourse-cdn.com/v4/letter/f/c77e96/32.png) [@fabry](https://discuss.elastic.co/u/fabry)\
**Post date:** [January 20, 2022, 7:43am UTC](https://discuss.elastic.co/t/elasticsearch-ccr-synchronization/294902/1 "2022-01-20T07:43:49Z")

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I have a couple of questions about how the CCR works.  
Does it uses a polling strategy? or whenever there is a new log it will be pushed to the remote cluster?

In case is a polling strategy how can reduce the polling delay? Do I have to modify this options "read\_poll\_timeout" : "1m" in the follow pattern?

What is the max time to wait to have both cluster sync (assuming that I have a log every 2 minutes for example)? Is it immediate?

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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 17, 2022, 7:44am UTC](https://discuss.elastic.co/t/elasticsearch-ccr-synchronization/294902/2 "2022-02-17T07:44:43Z")

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