I'm using AoE (CoRAID) as backend storage for GFS2 and they support jumbo frames (MTU=9000), changing the MTU at the interface level works and I can see AoE packets (layer 2) bigger than 1500, it does reach +8000. RHCS supports changing the MTU in cluster.conf via the 'netmtu' option in the totem directive and theoretically it's supposed to double the throughput performance, quote from openais.conf man page:
> Increasing the MTU from 1500 to 8982 doubles throughput performance from > 30MB/sec to 60MB/sec as measured with evsbench with 175000 byte messages with > the secauth directive set to off I've changed it in cluster.conf and has been accepted by CCS but I can't see any IP (layer 3/4) packets larger than 1472, anyone had any luck changing that and worked for them? Cheers, -- Abraham '''''''''''''''''''''''''''''''''''''''''''''''''''''' Abraham Alawi Unix/Linux Systems Administrator Science IT University of Auckland e: [email protected] p: +64-9-373 7599, ext#: 87572 '''''''''''''''''''''''''''''''''''''''''''''''''''''' -- Linux-cluster mailing list [email protected] https://www.redhat.com/mailman/listinfo/linux-cluster
