[Beowulf] Jumbo Gigabit Switches again (SMC vs HP)

[Yaroslav Halchenko]

Dear Beowulfers,

Sorry to bring up the old question but can anyone advice me to choose
between
cheaper SMC8648T which supports 9K jumbo frames
and
more expensive but I think with better warranty and support
HP ProCurve Switch 2848
here its brochure
http://www.hp.com/rnd/pdfs/datasheets/switch_2800_series.pdf

it is unclear though what is the size of jumbo frame in HP one.

The goals I'm looking for:
* high density -- we have 26 nodes + 1 service connections, so 24 port
  switch is not enough any more
* high throughput from the server (so there is not that much MPI going
  on on our cluster)
* reduced server load (now with 23 nodes, intensive I/O brings server
  down to its kneese - the crowd of nfsd's starves CPU time), that is
  why I'm trying to grab a switch with jumbo frames 

Please advise between the two

-- 
Yaroslav Halchenko
Research Assistant, Psychology Department, Rutgers-Newark
Office: (973) 353-5440x263 | FWD: 82823 | Fax: (973) 353-1171
Student  Ph.D. @ CS Dept. NJIT, Master @ CS Dept. UNM
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