# Hot - Warm Architecture with 3 Node Cluster

**URL:** <https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496>\
**Category:** Elasticsearch\
**Created:** [August 11, 2020, 6:47am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496 "2020-08-11T06:47:26Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![rakesh15](https://avatars.discourse-cdn.com/v4/letter/r/49beb7/32.png) [@rakesh15](https://discuss.elastic.co/u/rakesh15)\
**Post date:** [August 11, 2020, 6:47am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/1 "2020-08-11T06:47:27Z")

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Hi Team,

I'm trying to create the 3 Node Elasticsearch Cluster to store the time series logging data. The shards will have only 1 replication count to minimize the storage utilization.

Need help to understand the below points:

1. Can I create the cluster with Hot(2 Nodes) and Warm(1 Node) nodes ?
2. If yes, In case if any one of the Hot Node goes down, will that cause any problem to the shards ?
3. Is there any other alternative to achieve Hot - Warm Architecture with the cluster size of 3 ?

Thanks and Regards,  
Rakesh Chhabria

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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:** [August 11, 2020, 6:49am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/2 "2020-08-11T06:49:15Z")

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1. Yes
2. Not for the hot data. But you won't be able to have any replicas for the warm node, which is a concern
3. Not without loss of a replica set for either hot or warm

Why not just make it a cluster where they are all the same?

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**Author:** ![rakesh15](https://avatars.discourse-cdn.com/v4/letter/r/49beb7/32.png) [@rakesh15](https://discuss.elastic.co/u/rakesh15)\
**Post date:** [August 11, 2020, 7:24am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/3 "2020-08-11T07:24:55Z")

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Hi Mark,

Even I was also of the opinion of going ahead with Uniform Architecture, just wanted to explore the Hot-Warm Architecture option.

Could you please let me know what are recommended number of nodes to achieve the H-W Architecture.

Thanks and Regards,  
Rakesh Chhabria

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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:** [August 11, 2020, 7:25am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/4 "2020-08-11T07:25:49Z")

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You'd want 5 - 2 hot, 3 warm.  
This also means you maintain an uneven number for quorum.

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<div class="post-metadata">

**Author:** ![rakesh15](https://avatars.discourse-cdn.com/v4/letter/r/49beb7/32.png) [@rakesh15](https://discuss.elastic.co/u/rakesh15)\
**Post date:** [August 11, 2020, 7:35am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/5 "2020-08-11T07:35:54Z")

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In that scenario I can make any 3 Nodes as Master Node, for e.g. 1 Hot Master Node and 2 Warm Master Nodes.

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<div class="post-metadata">

**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:** [August 11, 2020, 7:47am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/6 "2020-08-11T07:47:27Z")

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Master eligible, yes you could do that.

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<div class="post-metadata">

**Author:** ![rakesh15](https://avatars.discourse-cdn.com/v4/letter/r/49beb7/32.png) [@rakesh15](https://discuss.elastic.co/u/rakesh15)\
**Post date:** [August 11, 2020, 8:48am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/7 "2020-08-11T08:48:37Z")

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Thanks Mark,

This solves all our problems. 👍

Thanks and Regards,  
Rakesh Chhabria

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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:** [September 8, 2020, 8:48am UTC](https://discuss.elastic.co/t/hot-warm-architecture-with-3-node-cluster/244496/8 "2020-09-08T08:48:47Z")

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