PQS (really, Avatica[1]) doesn't have a health-check endpoint.
We would need to figure out what it means for Avatica to check its own
health, and export such an endpoint.
[1] https://calcite.apache.org/avatica/docs/
On 8/7/19 4:19 PM, jesse wrote:
After further investigation, I figured there are two types of clients:
thin client and thick client.
- thin client talks to PQS, only ELB or PQS http address is supported
- thick client supports ZK
I don't know the PQS heath url yet, not documented anywhere. Any one knows?
On Wed, Aug 7, 2019, 12:06 PM Aleksandr Saraseka
<asaras...@eztexting.com <mailto:asaras...@eztexting.com>> wrote:
I didn't try this personally, but according to the documentation
https://phoenix.apache.org/server.html it has possibility to have
ZK-based load-balancing. Please refer to the "Load balancing"
section at the bottom.
On Wed, Aug 7, 2019 at 9:14 PM jesse <chat2je...@gmail.com
<mailto:chat2je...@gmail.com>> wrote:
Thank you all, very helpful information.
1) for server side ELB, what is the PQS health check url path?
2) Does Phoenix client library support client-side
load-balancing? i. e client gets list of PQS addresses from ZK,
and performs load balancing. Thus ELB won't be needed.
On Wed, Aug 7, 2019, 9:01 AM Josh Elser <els...@apache.org
<mailto:els...@apache.org>> wrote:
Great answer, Aleksandr!
Also worth mentioning there is only ever one active HBase
Master at a
time. If you have multiple started, one will be active as
the master and
the rest will be waiting as a standby in case the current
active master
dies for some reason (expectedly or unexpectedly).
On 8/7/19 9:55 AM, Aleksandr Saraseka wrote:
> Hello.
> - Phoenix libs should be installed only on RegionServers.
> - QueryServer - it's up to you, PQS can be installed
anywhere you want
> - No. QueryServer is using ZK quorum to get everything it
needs
> - If you need to balance traffic with multiply PQSs -
then yes, but
> again - it's up to you. It is not required multiply PQSs
if you have
> multiply HBase masters.
>
> On Wed, Aug 7, 2019 at 12:58 AM jesse
<chat2je...@gmail.com <mailto:chat2je...@gmail.com>
> <mailto:chat2je...@gmail.com
<mailto:chat2je...@gmail.com>>> wrote:
>
> Our cluster used to have one hbase master, now a
secondary is added.
> For phonenix, what changes should we make?
> - do we have to install new hbase libraries on the
new hbase
> master node?
> - do we need to install new query server on the hbase
master?
> - any configuration changes should we make?
> - do we need an ELB for the query server?
>
> Thanks
>
>
>
>
>
> --
> Aleksandr Saraseka
> DBA
> 380997600401
> <tel:380997600401> *•* asaras...@eztexting.com
<mailto:asaras...@eztexting.com>
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