On Sep 15, 2006, at 5:49 AM, Loic Tortay wrote:
According to Patrick Geoffray:
Greg Lindahl wrote:
If, however, you are considering something faster than gigabit
Ethernet, bear in mind that GPFS only can use TCP (as far as I
know).
The July 2006 presentation posted to the list about the same time as
your email says they're adding IB protocols in the future. I thought
that GPFS used to support GM directly?
Never did, AFAIK. For a while, I though it used UDP, but I was
mistaken.
According to the documentation, GPFS supports GM directly.
GPFS requires TCP so GPFS on Myrinet is probably not as efficient
as it
could theoretically be.
The GPFS documentation is available online, see for instance the
"Planning and Installation Guide" in which Myrinet is mentionned a few
times:
<http://publib.boulder.ibm.com/infocenter/clresctr/vxrx/index.jsp?
topic=
/com.ibm.cluster.gpfs.doc/gpfs31/bl1ins1146.html>.
Loïc.
Hi Loïc,
I looked at the documents. It is using Ethernet emulation over GM:
"If GPFS is configured to operate over Myrinet, to enable the Jumbo
Frames for Myrinet IP driver build the GM driver with the --enable-
new-features."
It is not using the GM (or MX) API at all.
Scott
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
