thakur at mcs.anl.gov
Thu Jul 13 09:43:09 PDT 2000
I couldn't agree more!
> To: Alexander Korenkov <beo_ at geocities.com>
> cc: beowulf at beowulf.org
> Subject: Re: cluster fs
> In-reply-to: Your message of "Thu, 13 Jul 2000 13:22:14 +0400."
> <396D8A46.A68D28C9 at geocities.com>
> Date: Thu, 13 Jul 2000 11:59:28 -0400
> From: "Walter B. Ligon III" <walt at parl.ces.clemson.edu>
> Sender: beowulf-admin at beowulf.org
> Errors-To: beowulf-admin at beowulf.org
> There is no such thing as "the best file system for clusters." It depends
> significantly on what you want to do with the file system. There have been
> a number of meetings aimed at identifying the "heavenly" file system that
> does everything for everyone, and the result of those meetings is it does
> not exist, and probably never will (due to highly conflicting requirements
> from different user communities).
> Without knowing what it is you are trying to do with your file system, anyone
> giving you such advise is blowing smoke up your ass. For you, the BEST file
> system may be something as simple as NFS or may be something much, much more
> So here are a few things to consider (NOT an exaustive list):
> is this for permanent storage or for short to medium term temp storage?
> is performance the overiding concern?
> is availability the overiding concern?
> is flexibility the overiding concern?
> is security the overiding concern?
> is protection from data loss the overiding concern?
> is ease of implementation/management/update the overiding concern?
> how many nodes are you trying to support?
> how many users are you trying to support?
> is this a Beowulf, or some other kind of cluster (is the network private,
> are the nodes dedicated, is it used primarily for parallel computing)?
> are you free to select any hardware you want, or are you constrained?
> is cost an overiding concern?
> what kind of applications do you expect to be running and what kind of
> file access patterns will they exhibit?
> Quite frankly a small cluster with a small number of users that run apps
> that don't do alot of I/O and you want to use cheap (IDE) disks and you
> don't want to spend a lot of time installing and maintaining the thing
> might get away with using NFS just fine. "Balls to the walls" performance
> is probably PVFS (thought I AM biased on that). Issues of availability and
> protection against loss and multi-user file access and stuff probably would
> lean toward a number of other approaches.
> So, I'm sure this is NOT what you wanted to hear, but this is as close to the
> truth as I can give you. Hope it helps!
> > Hello!
> > Could you advice me - what is the best file system for clusters?
> > If this cluster is homogeneous (Linux).
> > Thank you
> > Alexander
> > _______________________________________________
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> > Beowulf at beowulf.org
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> Dr. Walter B. Ligon III
> Associate Professor
> ECE Department
> Clemson University
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