Shards considered in write consistency


(Varun Vasan V) #1

Hey,

I have a question related to write consistency.

I have a elasticsearch cluster with 2 nodes. The nodes are configured as

number_of_shards = 5
number_of_replicas = 1

If i set the action.write_consistency value as quorum, what is the number
of active shards required to satisfy the quorum?
Please shed some light into the matter.

Thanks.

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(David Pilato) #2

In your case quorum means that you need all primaries to be allocated.
Which is the case here.

Doc explains that very well: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-index_.html#index-consistency
Have a look in detail at: http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/_how_primary_and_replica_shards_interact.html#_how_primary_and_replica_shards_interact
and http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/distrib-write.html

HTH

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David Pilato | Technical Advocate | Elasticsearch.com
@dadoonet | @elasticsearchfr

Le 2 juillet 2014 à 11:40:19, Varun Vasan V (varunvasan91@gmail.com) a écrit:

Hey,

I have a question related to write consistency.

I have a elasticsearch cluster with 2 nodes. The nodes are configured as

number_of_shards = 5
number_of_replicas = 1

If i set the action.write_consistency value as quorum, what is the number of active shards required to satisfy the quorum?
Please shed some light into the matter.

Thanks.

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(Varun Vasan V) #3

Thanks for your answer. Sorry for the late reply.

On Wed, Jul 2, 2014 at 4:14 PM, David Pilato david@pilato.fr wrote:

In your case quorum means that you need all primaries to be allocated.
Which is the case here.

Doc explains that very well:
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-index_.html#index-consistency
Have a look in detail at:
http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/_how_primary_and_replica_shards_interact.html#_how_primary_and_replica_shards_interact
and
http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/distrib-write.html

HTH

--
David Pilato | Technical Advocate | Elasticsearch.com
@dadoonet https://twitter.com/dadoonet | @elasticsearchfr
https://twitter.com/elasticsearchfr

Le 2 juillet 2014 à 11:40:19, Varun Vasan V (varunvasan91@gmail.com) a
écrit:

Hey,

I have a question related to write consistency.

I have a elasticsearch cluster with 2 nodes. The nodes are configured as

number_of_shards = 5
number_of_replicas = 1

If i set the action.write_consistency value as quorum, what is the
number of active shards required to satisfy the quorum?
Please shed some light into the matter.

Thanks.

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(system) #4