Yes, as long as it is three (the majority of 5) or more. This is why there is no point of having a 4 node cluster. This would also require 3 nodes for majority thus giving it the fault tolerance of a 3 node cluster but slower and more expensive.
2015-03-05 7:41 GMT+01:00 Aman Tandon <amantandon...@gmail.com>: > Thanks svante. > > What if in the cluster of 5 zookeeper only 1 zookeeper goes down, will > zookeeper election can occur with 4 / even number of zookeepers alive? > > With Regards > Aman Tandon > > On Tue, Mar 3, 2015 at 6:35 PM, svante karlsson <s...@csi.se> wrote: > > > synchronous update of state and a requirement of more than half the > > zookeepers alive (and in sync) this makes it impossible to have a "split > > brain" situation ie when you partition a network and get let's say 3 > alive > > on one side and 2 on the other. > > > > In this case the 2 node networks stops serving request since it's not in > > majority. > > > > > > > > > > > > > > > > > > 2015-03-03 13:15 GMT+01:00 Aman Tandon <amantandon...@gmail.com>: > > > > > But how they handle the failure? > > > > > > With Regards > > > Aman Tandon > > > > > > On Tue, Mar 3, 2015 at 5:17 PM, O. Klein <kl...@octoweb.nl> wrote: > > > > > > > Zookeeper requires a majority of servers to be available. For > example: > > > Five > > > > machines ZooKeeper can handle the failure of two machines. That's why > > odd > > > > numbers are recommended. > > > > > > > > > > > > > > > > -- > > > > View this message in context: > > > > > > > > > > http://lucene.472066.n3.nabble.com/Help-needed-to-understand-zookeeper-in-solrcloud-tp4190631p4190633.html > > > > Sent from the Solr - User mailing list archive at Nabble.com. > > > > > > > > > >
