For installations like yours we would recommend 3 master eligible nodes.
This number doesn't need to scale with data volumes as your data nodes do.
A master eligible node should also be dedicated to that task alone - trying
to also fulfil search or indexing activities puts them at the risk of
We recommend 3 master-eligible nodes because that gives you both a
resiliency to failure and a necessary quorum required to avoid split-brain.
Fortunately master nodes can be lighter-weight machines than those
dedicated to search.
Anything less than 3 dedicated master-eligible nodes is essentially an
architectural compromise made for smaller-budget configurations.
On Wednesday, January 14, 2015 at 9:39:47 AM UTC, Darshat Shah wrote:
To clarify, the guideline I'm looking for is how many nodes to set apart
as dedicated to be master eligible in a cluster of size N. That is not
On Wednesday, January 14, 2015 at 2:24:29 PM UTC+5:30, Darshat Shah wrote:
That's the minimum number. Is it recommended to have more, or will
elections take longer if we have more than this minimum?
On Wednesday, January 14, 2015 at 2:16:27 PM UTC+5:30, drjz wrote:
The formula is N/2+1, so in your case that would be 46 if there are 90
On Wednesday, January 14, 2015 at 9:38:01 AM UTC+1, Darshat Shah wrote:
What is the guideline on recommended number of master eligible nodes in
We have a big cluster with 90+ nodes, currently all are eligible to be
masters. However I do see master election take very long after a cluster
restart - most nodes are still trying to ping the old master and I think
there is no way to force a re-election.
Will re-election be faster if number of master eligible nodes be less?
Is there a rule of thumb, given N nodes how many should we configure to be
eligible to be masters?
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@example.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/0e1c31b3-7682-4009-bc79-b46a9c6cda2a%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.