Hi -tech. Merry $holiday. So, here's a fun gift that's been under my tree over the last few weeks. Maybe someone has run into this before - I hope so, because "slowness" issues can be endlessly frustrating.
I have a Dell M1000e blade chassis. I have 4 of the M6220 16-port blades in the A and C positions, and 2 of the M6348's in the B position. The chassis has two 10G uplinks in a LAG (A1 and A2 have the uplinks). Since you cant stack the M6220 with the M6348, I have a small fiber jumper running from A1 and A2 to B1 and B2 respectively. All the M6220s are stacked. Yes, the LAG groups are configured properly on both sides. I am seeing high latency from my VMware chassis to anywhere else on the LAN. Occasionally ping times in excess of 100ms+ will pop up on our monitoring system, then after a 2nd or 3rd probe they'll disappear. Running "du -sh /home/designs" (a NFS share connected to the upstream switches) on a VM within the chassis takes 44 minutes (real 43m50.722s, user 5.493s, sys 51.063s) to complete. On a compute node directly on the upstream switches, it's only 14 minutes (real 13m33.610s, user 4.061s, sys 47.292s). /home/designs have ~500gb in a ton of tiny files, so 14 minutes doesnt totally surprise me. 44 minutes, however... None of the links are maxed out. None of the interfaces show any errors. Netflow information from within VMware don't show saturation. esxtop doesnt show a high cpu or memory use, so... it should be some sort of network latency issue? "vmstat" tells me (during 'du' for example) that my cpu is near 100% idle, I have nothing waiting, etc. This seems correct. I unfortunately have no insight into the upstream switches, but the LAN team has looked at them and said "looks good to us." I'm not so certain it's a VMware issue or else I'd submit a ticket with them. Any of your thoughts or comments would be appreciated. What have I missed? - Patrick _______________________________________________ Tech mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
