Thanks Erick! On Thu, Aug 2, 2018 at 1:26 PM, Erick Erickson <erickerick...@gmail.com> wrote:
> Oh my, I see confusion on the horizon. _Which_ autoaddreplica? > > Pre 7x and autoscaling, autoAddReplica is all about HDFS and > spinning up a new Solr instance that points to an existing index > so there's no impact on the leader (other than normal peer sync > if you're actively indexing). > > Autoscaling, on the other hand (7x) spins up a new replica and > it goes through sync before it's ready to server queries. This is > really just an ADDREPLICA and you can test the impacts on > your particular installation by issuing that collections API > command. > > Best, > Erick > > On Thu, Aug 2, 2018 at 12:20 PM, Nawab Zada Asad Iqbal <khi...@gmail.com> > wrote: > > Hi, > > > > I am considering using SolrCloud and enable autoADDREPLICA. > > I am curious on how long does it take for SolrCloud to setup the replica. > > Before the new replica can start to serve queries, it needs to copy all > the > > documents in the current leader and also index whatever new traffic is > > arriving. How is this state tracked? I assume SolrCloud knows about this > > transient state between a new replica creation and being ready to server > > queries and handles it appropriately. > > > > Do I need to consider any performance issues after executing addReplica > > (i.e., will it affect the current leader's index or querying response > time > > when older segment files are being copied to the new replica). > > > > > > Thanks > > Nawab >
