Thanks for your help!
I think I was unclear about the number of I/O nodes, though. I looked at
the filesystem config file generated by pvfs2-genconfig and I can see the
list of I/O nodes, but I'm not looking for the total number of I/O nodes.
Rather, I'm looking for the per-file metadata setting that determines how
many I/O nodes the file is actually striped across. Where can I find how
this value is set by default?
Thanks,
~ Esteban
> stripe_size is in include/pvfs2-dist-single-stripe.h
> the base IO node is determined in a round-robin fashion so 10 files
> will ideally start on 10 different servers, if you had 10 servers.
> number of io nodes comes down through the distribution, and initally
> from the filesystem config file, I believe.
>
> Kyle
>
> On Mon, Aug 4, 2008 at 2:55 PM, Esteban Molina-Estolano
> <[EMAIL PROTECTED]> wrote:
>> I'm researching placement algorithms for different large-scale
>> filesystems
>> using trace-driven simulation, and I'm trying to write a simulator for
>> the
>> PVFS simple stripe placement algorithm.
>>
>> There's one detail I haven't been able to find in any documentation: how
>> the values for the base I/O node number, number of I/O nodes, and stripe
>> size are selected, by default, for each file.
>>
>> So far I've looked through the docs on the website, the dev mailing
>> list,
>> the 2000 paper ("PVFS: A Parallel Virtual File System for Linux
>> Clusters"), the document "PVFS2 Distribution Design Notes", and the
>> simple
>> stripe placement code (dist-simple-stripe.c).
>>
>> Where else should I be looking for these default settings?
>>
>> Thanks,
>> ~ Esteban Molina-Estolano
>> _______________________________________________
>> Pvfs2-developers mailing list
>> [email protected]
>> http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
>>
>
>
>
> --
> Kyle Schochenmaier
>
_______________________________________________
Pvfs2-developers mailing list
[email protected]
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
