Re: multithreaded processors and xfs

[Frank Hellmann <frank@xxxxxxxxxxxxx>]

Hi Pablo!

I suppose you mean the performance increase of one Pentium IV with 
Hyperthreading compared to one Pentium IV without?

In reality (at least around here) turning on/off Hyperthreading isn't 
increasing I/O performance in a way that is noticable. It will help if 
you are doing heavy computations with the data at the same time, e.g. 3D 
field simulations of data on XFS partitions. For normal fileserving 
functionality Hyperthreading won't matter.

The point of multi-threading here is, that multi-cpu boxes can run 
multiple threads at the same time and therefore use XFS parallel on more 
than just one cpu.

If you are in need to get more performance, there is always the option 
of dual or quad xeon/opteron boxes and better storage adapters and/or 
RAID subsystems.

                Cheers,
                        Frank...

Pablo Cruz Navea wrote:
> Dear list, some days ago I've read in a XFS documents that some
> objects like the Allocation Groups (AG) are multi-threaded. My
> question is: is the performance improved when we use a multi-threading
> processor like the Pentium IV? Please make a comparison between
> Pentium and some other common processors.
>
> Thank you very much.

--
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Frank Hellmann          Optical Art GmbH           Waterloohain 7a
DI Supervisor           http://www.opticalart.de   22769 Hamburg
frank@xxxxxxxxxxxxx     Tel: ++49 40 5111051       Fax: ++49 40 43169199