On Thursday 11 February 2010, Jagga Soorma wrote: > I have a QDR ib switch that should support up to 40Gbps. After installing > the kernel-ib and lustre client rpms on my SuSe nodes I see the following: > > hpc102:~ # ibstatus mlx4_0:1 > Infiniband device 'mlx4_0' port 1 status: > default gid: fe80:0000:0000:0000:0002:c903:0006:de19 > base lid: 0x7 > sm lid: 0x1 > state: 4: ACTIVE > phys state: 5: LinkUp > rate: 20 Gb/sec (4X DDR) > > Why is this only picking up 4X DDR at 20Gb/sec? Do the lustre rpm's not > support QDR? Is there something that I need to do on my side to force > 40Gb/sec on these ports?
This is a bit OT, but, a 20G rate typically means that you have a problem with one of: switch, hca, cable. Maybe your HCA is a DDR HCA? Maybe you need to upgrade the HCA firmware? /Peter > Thanks in advance, > -J
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