Hello,
I am new to SolrCloud and Zookeeper, and there's a piece of the puzzle on which
I'm unclear. I don't understand whether/how SolrCloud and Zookeeper handles
the high availability aspect. That is, once I have the Zookeeper ensemble set
up, now how do I reference the collection in a "high-availability" fashion so
that if one Solr instance is down, it will automatically route to another
instance?
Am I thinking that SolrCloud does more than it actually does? That is, could I
instead handle all Load Balancing outside of Zookeeper, and just use our
company's network load balancer to route/distribute traffic for a single
consolidated URL:port to the different actual Solr Instances/Ports?
Here's more details in case it helps:
I have an ASP.NET application which uses SolrNet to query and write to a
standalone Solr instance. In my program , I specify the hostname:port of my
Solr instance:
Startup.Init<SolrDoc>("hostname:port");
This setup was used for development and testing.
Now, for production, I need to implement Solr in a H.A. fashion so that I don't
have a single point of failure. So, following Apache's documentation, I
understand that the solution would be to set up an external Zookeeper Ensemble.
So, let's say I set up a new Zookeeper Ensemble (three instances). Let's also
say I have three Solr instances, #shards = 2, #replicas per shard = 2.
Once I have the Zookeeper ensemble set up, now how do I reference the
collection?
Previously, my code references a single standalone Solr instance,
"http://solrserver1:9983";. What do I point it to now?
If I point it to any of the three Solr instances, and if that instance I'm
referencing goes down, it means the request would fail, right?
I read similar questions online, for example
https://groups.google.com/forum/#!msg/solrnet/-PeaGrLAMtw/pAfxuoYLVnIJ, and the
answer seems to be that SolrNet doesn't support this type of HA. So, do I
understand correctly that the load balancing aspect needs to be handled on the
client-side (or via a network load balancer), not the zookeeper/solrcloud
server side?
Thanks,
Mike
