On 07/01/15 15:43, Saikat Maitra wrote:
Hi

I am Saikat, I am new to Apache Jena and I would like to contribute to
SPARQL Query Caching (https://issues.apache.org/jira/browse/JENA-626).

I would like to know if someone has already taken up the issue and
currently working on it. I have reviewed the old messages in developers
mail list and I suppose this issue is currently still Unassigned.

Regards
Saikat


Hi Saikat,

Good to check - no one seems have mentioned it any time recently.

There is some code:

https://svn.apache.org/repos/asf/jena/Experimental/sparql-cache/README.markdown

which is an external cache and has some issues:

1/ Updates don't invalidate the cache

2/ It's a rough prototype in scala I knocked together, not production tested

3/ Claims of "rate control" are overstated (there isn't any).
   (seems strange to have it in the cache code at all)

In Fuseki2, there is a server work area on disk so putting results somewhere on disk now makes more sense. Or memcached.

        Andy

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