On 3/24/2014 7:15 AM, David Flower wrote: > We have a 4 node cluster with a collection thats sharded into 2 and each > shard having a master and a slave for redundancy however 1 node has decied > to use twice the ram that the others are using within the cluster > > The only difference we can spot between the node is that the one with the > ram usage is saying its a slave while all the other are reporting that > they are masters
If you are using SolrCloud, then there are no masters and no slaves. Each shard has a leader, but that is not a permanent role. The master and slave designations that you see on the Replication tab have zero meaning in SolrCloud unless a replication happens to be happening right at that moment. In SolrCloud, replication is only used at node startup, and only if it's required. The master/slave roles are decided at the moment of replication and are not changed until another replication becomes necessary. When you say it's using twice the RAM, what *precisely* are you looking at which tells you this? Due to Solr using MMap for file access, some of the numbers reported by the operating system will look bad but will not indicate a problem. Thanks, Shawn
