agree with Anshum and Netflix has very nice supervisor system for ZooKeeper if they goes down it will restart them automatically
http://techblog.netflix.com/2012/04/introducing-exhibitor-supervisor-system.html https://github.com/Netflix/exhibitor On Fri, May 3, 2013 at 6:53 PM, Anshum Gupta <ans...@anshumgupta.net> wrote: > In case all your Zk nodes go down, the querying would continue to work > fine (as far as no nodes fail) but you'd not be able to add docs. > > Sent from my iPhone > > On 03-May-2013, at 17:52, Shawn Heisey <s...@elyograg.org> wrote: > > > On 5/3/2013 6:07 PM, Walter Underwood wrote: > >> Ideally, the Solr nodes should be able to continue as long as no node > fails. Failure of a leader would be bad, failure of non-leader replicas > might cause some timeouts, but could be survivable. > >> > >> Of course, nodes could not be added. > > > > I have read a few things that say things go read only when the zookeeper > > ensemble loses quorum. I'm not sure whether that means that Solr goes > > read only or zookeeper goes read only. I would be interested in knowing > > exactly what happens when zookeeper loses quorum as well as what happens > > if all three (or more) zookeeper nodes in the ensemble go away entirely. > > > > I have a SolrCloud I can experiment with, but I need to find a > > maintenance window for testing, so I can't check right now. > > > > Thanks, > > Shawn > > >
