Need comments about cluster file systems
bogdan.costescu at iwr.uni-heidelberg.de
Fri Nov 15 07:05:12 EST 2002
> Let's say that from a hardware point of view, the Compaq SC solution is
> no more than a alpha cluster with a fast interconnection (QSW).
I think that you miss something here: this is an integrated product. You
buy it as whole (and pay a lot for it!) and you don't assemble it from
COTS components as a beowulf cluster (but please don't start another
"what's a beowulf" discussion :-)).
Now think what the requirements are for PVFS - do you see any mention of
proprietary network/protocol ? The fact that Compaq knows that it has the
fast interconnection available makes it much easier for C/P-FS, as you
> ... uses the QSW NIC to access disks via some file servers, ...
... and of course if you can get NBD to work over the fast interconnect,
you can the achieve the following...
> ... PFS is able to manage parallel access to file servers, that gives
> you more throughput of course.
... through RAID1 over NDB.
> Are there some figures about PVFS perfs over SCI and/or Myrinet ?
I've only heard of fast interconnect (not including here Gigabit Ethernet)
being used for computation as people usually pay the premium for getting a
low latency device/protocol...
IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
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E-mail: Bogdan.Costescu at IWR.Uni-Heidelberg.De
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