"but if those same machines are running zookeeper, you need 3."
And one of those 3 can go down? I thought 3 was the minimum number of
zookeepers.
-- Jack Krupansky
-----Original Message-----
From: Mark Miller
Sent: Thursday, December 06, 2012 9:30 AM
To: solr-user@lucene.apache.org
Subject: Re: Minimum HA Setup with SolrCloud
It depends on if you are running embedded zk or an external zk ensemble.
One leader and a replica is all you need for Solr to allow on machine to go
down - but if those same machines are running zookeeper, you need 3.
You could also run zookeeper on one external machine and then it would be
fine if you lost one solr node - but if you the one external zk node went
down you would lose the ability to do updates until it was brought back up.
- Mark
On Dec 6, 2012, at 2:46 AM, Thomas Heigl <tho...@umschalt.com> wrote:
Hey all,
I'm in the process of migrating a single Solr 4.0 instace to a SolrCloud
setup for availability reasons.
After studying the wiki page for SolrCloud I'm not sure what the absolute
minimum setup is that would allow for one machine to go down.
Would it be enough to have one shard with one leader and one replica?
Could
this setup tolerate one of the instances going down? Or do I need three
instance because Zookeeper needs a quorum of instances?
Cheers,
Thomas
