-----Original Message-----
From: Shawn Heisey [mailto:apache@elyograg.org]
Sent: 09 March 2018 05:10
To: solr-user@lucene.apache.org
Subject: Re: What are descent disk I/O for Solr and Zookeeper ?
On 3/8/2018 2:55 PM, Dominique Bejean wrote:
> Disk I/O are critical for high performance Solrcloud.
This statement has truth to it, but if your system is correctly sized, disk
performance will not have much of an impact on Solr performance. If
upgrading to faster disks does improves long-term query performance, the
system probably doesn't have enough memory installed. There can be other
causes, but that is the most common.
When there is enough memory available to allow the operating system to
effectively cache the index data, Solr will not need to access the disk much
at all for queries -- all that data will be already in memory. Indexing will
still be dependent on disk performance even when there is plenty of memory,
because that will require writing new data to the disk.
https://wiki.apache.org/solr/SolrPerformanceProblems
This is my hammer. To me, your question looks like a nail. :)
Thanks,
Shawn
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