# Relationship between action.replication\_type and action.write\_consistency **URL:** \ **Category:** Elasticsearch\ **Created:** [August 13, 2013, 3:41am UTC](https://discuss.elastic.co/t/relationship-between-action-replication-type-and-action-write-consistency/13192 "2013-08-13T03:41:53Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Oli\_McCormack](https://avatars.discourse-cdn.com/v4/letter/o/fbc32d/32.png) [@Oli\_McCormack](https://discuss.elastic.co/u/Oli_McCormack)\ **Post date:** [August 13, 2013, 3:41am UTC](https://discuss.elastic.co/t/relationship-between-action-replication-type-and-action-write-consistency/13192/1 "2013-08-13T03:41:53Z")
Hi there, The _action.replication\_type=sync_ option suggests to me that \*all \*shards (primary + replicas) must be written to before an index operation returns. However, my reading of _action.write\_consistency_ suggests that it actually dictates how many shards need to be present for a write/index to occur. If I have the following settings: shards: 1 primary + 2 replicas action.replication\_type: sync action.write\_consistency: quorum What is the result? Will indexing success on the primary and a single replica return a successful write operation to me? Thanks very much for any help. I've included some related docs/links that I've been through below, but have yet to be conclusive on this! - oli Some useful related links: Notes on these settings in the docs[http://www.elasticsearch.org/guide/reference/api/index\_/](http://www.elasticsearch.org/guide/reference/api/index_/) Get consistency and quorum from the list[https://groups.google.com/forum/#!searchin/elasticsearch/action.replication\_type/elasticsearch/YbaM-TPhZMg/zppsQBuxbV8J](https://groups.google.com/forum/#!searchin/elasticsearch/action.replication_type/elasticsearch/YbaM-TPhZMg/zppsQBuxbV8J) Video from Shay discussing the nature of push replication for shards[http://vimeo.com/26710663](http://vimeo.com/26710663) -- 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). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![Oli\_McCormack](https://avatars.discourse-cdn.com/v4/letter/o/fbc32d/32.png) [@Oli\_McCormack](https://discuss.elastic.co/u/Oli_McCormack)\ **Post date:** [September 10, 2013, 1:03pm UTC](https://discuss.elastic.co/t/relationship-between-action-replication-type-and-action-write-consistency/13192/2 "2013-09-10T13:03:56Z")
I got an answer to this question, so for anyone else that comes across it: Setting action.replication\_type: sync means that success will be returned once action.write\_consistency is achieved. In the following scenario: shards: 1 primary + 2 replicas action.replication\_type: sync action.write\_consistency: quorum A sync indexing operation will succeed once quorum (a primary and a single replica) have been written to. - oli On Tue, Aug 13, 2013 at 4:41 AM, Oli [oli@climate.com](mailto:oli@climate.com) wrote: > Hi there, > > The _action.replication\_type=sync_ option suggests to me that \*all \*shards > (primary + replicas) must be written to before an index operation returns. > However, my reading of _action.write\_consistency_ suggests that it > actually dictates how many shards need to be present for a write/index to > occur. > > If I have the following settings: > shards: 1 primary + 2 replicas > action.replication\_type: sync > action.write\_consistency: quorum > > What is the result? Will indexing success on the primary and a single > replica return a successful write operation to me? > > Thanks very much for any help. I've included some related docs/links that > I've been through below, but have yet to be conclusive on this! > > - oli > > Some useful related links: > Notes on these settings in the docs[http://www.elasticsearch.org/guide/reference/api/index\_/](http://www.elasticsearch.org/guide/reference/api/index_/) > Get consistency and quorum from the list[https://groups.google.com/forum/#!searchin/elasticsearch/action.replication\_type/elasticsearch/YbaM-TPhZMg/zppsQBuxbV8J](https://groups.google.com/forum/#!searchin/elasticsearch/action.replication_type/elasticsearch/YbaM-TPhZMg/zppsQBuxbV8J) > Video from Shay discussing the nature of push replication for shards[http://vimeo.com/26710663](http://vimeo.com/26710663) > > -- > 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). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- 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). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**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, 2:17am UTC](https://discuss.elastic.co/t/relationship-between-action-replication-type-and-action-write-consistency/13192/3 "2017-07-06T02:17:18Z")