Depending why the node goes down - going mid-way with dedicated master
nodes is sometimes the solution
And if this is due to massive use of aggregations, doc-values may be the
answer (or larger heap, but that's costlier)
--
Itamar Syn-Hershko
http://code972.com | @synhershko https://twitter.com/synhershko
Freelance Developer & Consultant
Lucene.NET committer and PMC member
On Thu, Feb 12, 2015 at 11:40 PM, Mark Walkom markwalkom@gmail.com wrote:
Except that is overkill when you only have 3 nodes.
How much data do you have in the cluster?
On 13 February 2015 at 01:15, Itamar Syn-Hershko itamar@code972.com
wrote:See this:
Elasticsearch Platform — Find real-time answers at scale | ElasticBasically, the recommended pattern talks about isolating
responsibilities. A node should either be a data node, master-eligible
node, or an external gateway to the cluster (client node)--
Itamar Syn-Hershko
http://code972.com | @synhershko https://twitter.com/synhershko
Freelance Developer & Consultant
Lucene.NET committer and PMC memberOn Thu, Feb 12, 2015 at 4:08 PM, Eric eric.luellen@gmail.com wrote:
Hello,
Currently I have a 3 node Elasticsearch cluster. Each node is a RHEL VM
with 16 gig RAM. The basic config is:
- All nodes can be master and are data nodes.
- 3 shards and 1 replica
- 6 different indexes
I'm starting to run into issues of Elasticsearch bogging down on
searches and is completely freezing sometimes at night. I've dedicated 9
gig to heap size and it says i'm using ~60% of the heap RAM and about 70%
of the overall heap. So even though I'm using quite a bit of the heap, I'm
not maxed out. I've attached a screenshot of the exact stats from Elastic
HQ. I'm averaging around 10,000 events/sec coming into the cluster from 6
different Logstash instances on another server.My question is what can I do to help the stability and speed of my
cluster. Currently I'm having issues with 1 node going down and it taking
everything else down. The HA portion isn't working very well. I'm debating
about either adding 1 more node with the exact same stats or adding 2 more
smaller VMs that will act as master nodes only. I didn't know which one was
recommended or where I would get the biggest bang for the buck.Any information would be greatly appreciated.
Thanks,
Eric--
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