Hi Paul, Shawn is referring to use Collections API https://cwiki.apache.org/confluence/display/solr/Collections+API than Core Admin API https://cwiki.apache.org/confluence/display/solr/CoreAdmin+API for SolrCloud.
Hope that clarifies and you mentioned about ADDREPLICA which is the collections API, so you are on right track. Thanks, Susheel On Sun, Feb 14, 2016 at 10:51 AM, McCallick, Paul < paul.e.mccall...@nordstrom.com> wrote: > Then what is the suggested way to add a new node to a collection via the > apis? I am specifically thinking of autoscale scenarios where a node has > gone down or more nodes are needed to handle load. > > Note that the ADDREPLICA endpoint requires a shard name, which puts the > onus of how to scale out on the user. This can be challenging in an > autoscale scenario. > > Thanks, > Paul > > > On Feb 14, 2016, at 12:25 AM, Shawn Heisey <apa...@elyograg.org> wrote: > > > >> On 2/13/2016 6:01 PM, McCallick, Paul wrote: > >> - When creating a new collection, SOLRCloud will use all available > nodes for the collection, adding cores to each. This assumes that you do > not specify a replicationFactor. > > > > The number of nodes that will be used is numShards multipled by > > replicationFactor. The default value for replicationFactor is 1. If > > you do not specify numShards, there is no default -- the CREATE call > > will fail. The value of maxShardsPerNode can also affect the overall > > result. > > > >> - When adding new nodes to the cluster AFTER the collection is created, > one must use the core admin api to add the node to the collection. > > > > Using the CoreAdmin API is strongly discouraged when running SolrCloud. > > It works, but it is an expert API when in cloud mode, and can cause > > serious problems if not used correctly. Instead, use the Collections > > API. It can handle all normal maintenance needs. > > > >> I would really like to see the second case behave more like the first. > If I add a node to the cluster, it is automatically used as a replica for > existing clusters without my having to do so. This would really simplify > things. > > > > I've added a FAQ entry to address why this is a bad idea. > > > > > https://wiki.apache.org/solr/FAQ#Why_doesn.27t_SolrCloud_automatically_create_replicas_when_I_add_nodes.3F > > > > Thanks, > > Shawn > > >
