One is the loneliest number that you'll ever do, Two can be as bad as one, it's the loneliest number since the single Zoo.
Michael Della Bitta ------------------------------------------------ Appinions 18 East 41st Street, 2nd Floor New York, NY 10017-6271 www.appinions.com Where Influence Isn’t a Game On Thu, Dec 6, 2012 at 4:39 PM, Otis Gospodnetic <otis.gospodne...@gmail.com > wrote: > 1 is the minimum :) > 2 makes no sense. > 3 must be the most common number in the zoo. > > Otis > -- > Performance Monitoring - http://sematext.com/spm/index.html > Search Analytics - http://sematext.com/search-analytics/index.html > > > > > On Thu, Dec 6, 2012 at 9:46 AM, Jack Krupansky <j...@basetechnology.com > >wrote: > > > "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 > >> > > > > >
