[Lustre-discuss] MDT disk size consideration

[Peter Kjellstrom]

On Thursday 20 August 2009, Arne Wiebalck wrote:
> Jiawei,
>
> you may want to have a look at section 20.3.2 in the operations manual,
> it discusses how to size an MDT.
>
>  From what I understand, a 100GB MDT is more than enough for your
> ~200.000 files.

We have several file systems with MDT < 100G and with ~2.000.000 files (and 
the MDT is nowhere near full). Much depends on how you stripe files (our 
systems use simple round robin placement of whole files).

/Peter

> I think the max MDT size is 8TB.
>
> HTH,
>   Arne
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