Hi Steve,
We get this question a lot.
Software redundancy in a parallel file system is a very challenging
problem, particularly to provide efficient access at the same time.
The group at Clemson has been looking into this as a research project,
and I believe that others have as well. If a group creates a solution
that performs well, reliably operates, and fits into the rest of the
PVFS system, then we would certainly consider integrating it into the
production releases. This hasn't happened so far...
Regards,
Rob
Steve wrote:
Is built in redundancy planned ? Or not in the scope of the project ?
Steve
Trusting my 1.1Tb to the reliability of my drives, and touch wood in 20
years of computing had never had a drive fail. Now ive just put a curse on
them!
-------Original Message-------
From: Robert Latham
Date: 24/04/2007 14:14:13
To: Erich Weiler
Cc: [email protected]
Subject: Re: [Pvfs2-users] Question about redundancy
On Mon, Apr 23, 2007 at 05:03:39PM -0700, Erich Weiler wrote:
I need to be clear on this before putting a lot of time into it, but it
sounds like this might be a good solution for our firm, as we have a 200
node cluster each with one 500GB disk, 400GB of which can be leveraged
to a massive parallel file system (400GB x 200 nodes = one big ~80TB
distributed file system). But that assumes that there is no redundancy,
other wise that 80TB would be more like 50-60TB max or something because
there would be some redundancy in there... ?
Murali's explanation is spot-on: no software-based reduncancy scheme.
For users concerned with redundancy, we suggest hardware failover to
Shared storage, which works quite well.
==rob
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