# Use of CLUSTER\_IGNORE\_SCHEMA\_SYNC

**URL:** <https://forum.weaviate.io/t/use-of-cluster-ignore-schema-sync/1045>\
**Category:** General\
**Tags:** developer-experience\
**Created:** [November 30, 2023, 4:54am UTC](https://forum.weaviate.io/t/use-of-cluster-ignore-schema-sync/1045 "2023-11-30T04:54:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Dharanish](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/dharanish/32/659_2.png) [@Dharanish](https://forum.weaviate.io/u/Dharanish)\
**Post date:** [November 30, 2023, 4:54am UTC](https://forum.weaviate.io/t/use-of-cluster-ignore-schema-sync/1045/1 "2023-11-30T04:54:46Z")

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Hello Team, what is the use of Environment CLUSTER\_IGNORE\_SCHEMA\_SYNC  
I can’t find anything ?

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**Author:** ![DudaNogueira](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/dudanogueira/32/7846_2.png) [@DudaNogueira](https://forum.weaviate.io/u/DudaNogueira)\
**Post date:** [November 30, 2023, 12:04pm UTC](https://forum.weaviate.io/t/use-of-cluster-ignore-schema-sync/1045/2 "2023-11-30T12:04:49Z")

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Hi!

Thanks for pointing it out. Looks like this is not yet documented here:

> **[Environment variables | Weaviate - vector database](https://weaviate.io/developers/weaviate/config-refs/env-vars)**
>
> Overview

[Looking the code](https://github.com/search?q=repo%3Aweaviate%2Fweaviate%20CLUSTER_IGNORE_SCHEMA_SYNC&type=code) it seems that if you set it to `true` Weaviate will not try to sync schemas between nodes of a cluster on node startup.

here, from that code comments:

> // - If Node 1 and Node 2 both have a schema, but they aren’t in sync, the  
> // cluster is broken. This state cannot be automatically recovered from and  
> // startup needs to fail. Manual intervention would be required in this case.

I believe this is more a “internal” setting, that I see being used in tests where you may want to explicitly have unsynced nodes.

Let me know if that helps.