On Sat, 29 May 2004, Yannick Warnier wrote:

> > > - how wrong is creating 20 databases (total 400 tables) when you know
> > > you could create just one (total around 200 tables)?
> >
> > For linux ext2, I'd rather have 20db 20table than 1db 200 table.
> > Neither approach practical limits tho.
>
> Well... hopefully it doesn't.
>
> > > - what does MySQL handle better? Databases or tables?
> >
> > Depends on filesystem/table type.  For myisam, databases.  Each
> > database creates 1 directory entry, each table creates 3 file entries.
>
> Ext2 / MyIsam, so I guess that makes 2800 directories with 60 files each
> or something similar

I had a related problem: ext2 was very slow to list a drectory with 14'000
files. When I switched to ReiserFS it was fine. Recently someone on this
list compared the performance of different file systems using MySQL. You
may want to check the archives.

Thomas Spahni


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