is there anything in the lustre software that allows me to ''traceroute'' an lnet path? i have a dual gateway setup, I want to make sure the data is flowing over both gateways from particular machines
Hi, cat /proc/sys/lnet/peers can show some helpful information like queued bytes and router-buffer credits, but these information may not be enough to confirm realtime data flow. Of course, It''s not difficult to make LNet record information like forwarded bytes on each router. On 10/19/10 2:47 AM, Michael Di Domenico wrote:> is there anything in the lustre software that allows me to > ''traceroute'' an lnet path? i have a dual gateway setup, I want to > make sure the data is flowing over both gateways from particular > machines > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss-- Cheers Liang
On Tue, Oct 19, 2010 at 11:05:08AM +0800, liang.whamcloud wrote:> ...... > to confirm realtime data flow. Of course, It''s not difficult to make > LNet record information like forwarded bytes on each router.I think it''s already recorded - in the second to last field in "/proc/sys/lnet/stats". Thanks, Isaac
hmm... I think lnet/stats will record forwarded bytes all together, but not for each single route. it''s probably more helpful If we can record such information on lnet_route or lnet_peer, how do you think? Regards Liang On 10/19/10 1:46 PM, Isaac Huang wrote:> On Tue, Oct 19, 2010 at 11:05:08AM +0800, liang.whamcloud wrote: >> ...... >> to confirm realtime data flow. Of course, It''s not difficult to make >> LNet record information like forwarded bytes on each router. > I think it''s already recorded - in the second to last field in > "/proc/sys/lnet/stats". > > Thanks, > Isaac
Isaac, Sorry I haven''t made it very clear in previous mail, I mean, current stat can''t show forwarded-bytes from point of view of client/server, it''s aggregation of all nodes connected on router, right? Liang On 10/19/10 1:46 PM, Isaac Huang wrote:> On Tue, Oct 19, 2010 at 11:05:08AM +0800, liang.whamcloud wrote: >> ...... >> to confirm realtime data flow. Of course, It''s not difficult to make >> LNet record information like forwarded bytes on each router. > I think it''s already recorded - in the second to last field in > "/proc/sys/lnet/stats". > > Thanks, > Isaac