[Cdash] How to handle huge test output

Julien Jomier julien.jomier at kitware.com
Thu Dec 10 17:04:38 UTC 2009

Hi Martin,

> we are indeed using MySQL as the database backend. As I don't know the 
> internal table organisation of CDash, I am wondering, if compressing 
> whole rows wouldn't slow down accesses
> to the tables very much. Wouldn't it be better to only compress the 
> column containing the text output? This could be done in CDash upon 
> access of this column only.

I played with the compression this morning and using zlib to compress 
the test output we can get up to 8 times compression. I think this is 
the way to go. I'm going to implement that soon.

> I already tried to put a feature request in the bug tracker, but the bug 
> tracker, which is linked from www.cdash.org does only contain category 
> entries for CMake, CTest etc., but not for CDash.
> So I thought I'd ask on the mailing list first.

There is a project CDash on www.cdash.org/Bug. We probably want to move 
the bug to the CDash project.


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