IIRC, we turned on portfast (or the equivilent for your switch) for all the compute nodes. This setting will, more or less, completely disable spanning tree on the ports in question, which will break any connection to other switches/routers. It is 100% safe (IME) to use for compute nodes. It's 100% dangerous to use on uplink, downlink and etherchannel/LACP interfaces.
We enable hardware flow control on the switch for all 10G (and 1G) links. This is as close to a "magic make network not suck" setting as we've seen anywhere. There are host of interface tweaking pages out there. I'm not going to suggest anything specific because things have changed a lot in the past few years, and what made sense for an older 2.6 kernel may not for a newer one (much less a 3.x kernel). On Tue, Sep 11, 2012 at 10:34:13PM -0400, Kent C. Brodie wrote:
Great tips. As I set up cacti etc... a followup query.. any special settings you all are using as per the Linux interfaces or on the switch? For example I have pretty much default everything but have 9000 for the MTU (jumbo frames). (Sent from my Galaxy Nexus phone)
-- Jesse Becker NHGRI Linux support (Digicon Contractor) _______________________________________________ users mailing list [email protected] https://gridengine.org/mailman/listinfo/users
