I typically suggest to start with the default of 5 shards. A single shard can hold several tens of gigabytes. Certainly in your case it seems like 20 shards is overkill for a 4 node cluster.
> On Mar 17, 2015, at 11:00 AM, John S <[email protected]> wrote: > > Hi All, > > Is there any best practices of having on the number of shards for a cluster? > I have a 4 node cluster and used shards of 20. > > During any node failure or other events i doubts since the shards number is > high, replication to new node is taking more time... > > Is there any metrics or formula to be done for number or shards? > > Regards > John > > -- > 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 [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/6e51f1e4-8938-4196-84a9-007705869b6a%40googlegroups.com > > <https://groups.google.com/d/msgid/elasticsearch/6e51f1e4-8938-4196-84a9-007705869b6a%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/DD2AA858-ABD4-49F5-9F9C-D73C01F615CE%40elastic.co. For more options, visit https://groups.google.com/d/optout.
