On 4/25/2019 2:44 PM, Sadiki Latty wrote:
- replica 1
If I need to upgrade Solr, the recommended method is to update one at a time. However,
when I bring down one Solr instance I noticed that queries no longer work and I get the
error "no servers hosting shard" from the node that is up. After some research
I am wondering if this is happening because of the shard configuration. Is there any way
for me to do an upgrade without any/siginificant downtime?
If your replicationFactor is 1, you have zero redundancy. As soon as
the Solr instance hosting that single copy of the shard goes down, that
shard is gone.
You would need a replicationFactor of at least 2 -- so there are at
least two copies of your index.
Thanks,
Shawn
