overview mechanisms

[Julien ÉLIE]

Hi Bo,

> Quick and dirty test running "makehistory -O -x" on 544504 entries
> with the cycbuffs and the overview data both stored on the same
> external rotating rust device.
> 
> method    real time  CPU time  disk space
> ========  =========  ========  ==========
> ovdb         329.80     31.43        402M
> ovsqlite     333.51     54.73        200M

Thanks for the benchmark!
Are ovdb and INN built with zlib support, and "compress" set to true in 
ovdb.conf?

-- 
Julien ÉLIE

« Les grands artistes n'ont pas de patrie. » (Alfred de Musset)