Ok, https://wiki.apache.org/solr/SolrPerformanceFactors
states that: "Retrieving the stored fields of a query result can be a
significant expense. This cost is affected largely by the number of
bytes stored per document--the higher byte count, the sparser the
documents will be distributed on disk and more I/O is necessary to
retrieve the fields (usually this is a concern when storing large
fields, like the entire contents of a document)."
But in my case (with docValues=true) there should be no reason to
access *.fdt.
Kind regards,
Jochen
Zitat von Jochen Barth <ba...@ub.uni-heidelberg.de>:
Something is really strange here:
even when configuring fields id + sort_... to docValues="true" -- so
there's nothing to get from "stored documents file" -- performance
is still terrible with ocr stored=true _even_ with my patch which
stores uncompressed like solr4.0.0 (checked with strings -a on *.fdt).
Just reading
http://lucene.472066.n3.nabble.com/Can-Solr-handle-large-text-files-td3439504.html .. perhaps things will clear up soon (will check if spltting to index+non-stored and non-indexed+stored could help
here)
Kind regards,
J. Barth
Zitat von Shawn Heisey <s...@elyograg.org>:
On 4/29/2014 4:20 AM, Jochen Barth wrote:
BTW: stored field compression:
are all "stored fields" within a document are put into one
compressed chunk,
or by per-field basis?
Here's the issue that added the compression to Lucene:
https://issues.apache.org/jira/browse/LUCENE-4226
It was made the default stored field format for Lucene, which also made
it the default for Solr. At this time, there is no way to remove
compression on Solr without writing custom code. I filed an issue to
make it configurable, but I don't know how to do it. Nobody else has
offered a solution either. One day I might find some time to take a
look at the issue and see if I can solve it myself.
https://issues.apache.org/jira/browse/SOLR-4375
Here's the author's blog post that goes into more detail than the LUCENE
issue:
http://blog.jpountz.net/post/33247161884/efficient-compressed-stored-fields-with-lucene
Thanks,
Shawn
