Looking for speakers on High Performance Computing at GTALUG

[Lennart Sorensen]

On Mon, Jan 25, 2010 at 04:52:38PM -0500, Madison Kelly wrote:
> Lennart Sorensen wrote:
>> On Mon, Jan 25, 2010 at 04:28:52PM -0500, Myles Braithwaite wrote:
>>> On Mon, Jan 25, 2010 at 4:26 PM, Lennart Sorensen
>>> <lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org> wrote:
>>>> Please tell me you meant s/Distrusted/Distributed/g.
>>> *Blow face in shame* Yes.. Would you like to do the talk on
>>> Distributed Programming?
>>
>> I wouldn't consider myself qualified for it.  I know in involves openMPI
>> and such, but I haven't done any.  I do love those systems though.
>>
>> I am still wondering what a distrusted filesystem would be like.  Does the
>> application have to assume the filesystem can't be trusted and add all
>> sorts of redundancy, error correction and checksums itself?
>
> It depends on how many systems and of what kind are accessing the shared  
> drive. The simplest is DRBD which can be thought of as RAID 1 over  
> ethernet. It handles locking at the (virtual) block layer. Once setup,  
> it can be used as a normal block device with the main requirement being  
> that the FS is journaled. Ideally, you'd use something like LVM in  
> cluster aware mode if you want to run in Master/Master.
>
> It really depends on how you want to approach it and what you are trying  
> to accomplish.

Read the message again _carefully_.  Note the spelling.

I know how distributed filesystems work.  It's those distrusted
filesystems mentioned originally I was pondering.

-- 
Len Sorensen
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