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From Bernd Fehling <>
Subject Re: question about updates to shard leaders only
Date Tue, 15 May 2018 10:53:30 GMT
Thanks, solved, performance is good now.


Am 15.05.2018 um 08:12 schrieb Bernd Fehling:
> OK, I have the CloudSolrClient with SolrJ now running but it seams
> a bit slower compared to ConcurrentUpdateSolrClient.
> This was not expected.
> The logs show that CloudSolrClient send the docs only to the leaders.
> So the only advantage of CloudSolrClient is that it is "Cloud aware"?
> With ConcurrentUpdateSolrClient I get about 1600 docs/sec for loading.
> With CloudSolrClient I get only about 1200 docs/sec.
> The system monitoring shows that with CloudSolrClient all nodes and cores
> are under heavy load. I thought that only the leaders are under load
> until any commit and then replicate to the other replicas.
> And that the replicas which are no leader have capacity to answer search requests.
> I think I still don't get the advantage of CloudSolrClient?
> Regards,
> Bernd
> Am 09.05.2018 um 19:15 schrieb Erick Erickson:
>> You may not need to deal with any of this.
>> The default CloudSolrClient call creates a new LBHttpSolrClient for
>> you. So unless you're doing something custom with any LBHttpSolrClient
>> you create, you don't need to create one yourself.
>> Second, the default for CloudSolrClient.add() is to take the list of
>> documents you provide into sub-lists that consist of the docs destined
>> for a particular shard and sends those to the leader.
>> Do the default not work for you?
>> Best,
>> Erick
>> On Wed, May 9, 2018 at 2:54 AM, Bernd Fehling
>> <> wrote:
>>> Hi list,
>>> while going from single core master/slave to cloud multi core/node
>>> with leader/replica I want to change my SolrJ loading, because
>>> ConcurrentUpdateSolrClient isn't cloud aware and has performance
>>> impacts.
>>> I want to use CloudSolrClient with LBHttpSolrClient and updates
>>> should only go to shard leaders.
>>> Question, what is the difference between sendUpdatesOnlyToShardLeaders
>>> and sendDirectUpdatesToShardLeadersOnly?
>>> Regards,
>>> Bernd

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