[Lustre-discuss] Problems mountine lustre thru an ib2ip gateway

Chad Kerner ckerner at ncsa.uiuc.edu
Tue Mar 11 11:27:48 PDT 2008


Hello,

 	I am trying to mount a lustre filesystem thru an ib2ip gateway. 
The MDS's have infiniband connections.  The client nodes are tcp/ip 
connections.  I am able to route between the client nodes and the MDS's.

I have the following in /etc/fstab:
abe-mds1 at o2ib0,abe-mds2 at o2ib0:/home/client      /abehome       lustre 
_netdev,flock 0 0


I get the following when trying to mount:
[root at t3honest5 lustre]# mount -v /abehome
verbose: 1
arg[0] = /sbin/mount.lustre
arg[1] = abe-mds1 at o2ib0,abe-mds2 at o2ib0:/home/client
arg[2] = /abehome
arg[3] = -v
arg[4] = -o
arg[5] = rw,_netdev,flock
mds nid 0:       141.142.69.7 at o2ib
mds nid 1:       141.142.69.8 at o2ib
mds name:        home
profile:         client
options:         rw,_netdev,flock
retry:           0
mount.lustre: mount(abe-mds1 at o2ib0,abe-mds2 at o2ib0:/home/client, 
/abehome) failed: Input/output error
mds nid 0:       141.142.69.7 at o2ib
mds nid 1:       141.142.69.8 at o2ib
mds name:        home
profile:         client
options:         rw,_netdev,flock
retry:           0
[root at t3honest5 lustre]#


I can see the MDS nodes:
[root at t3honest5 lustre]# ping -c2 141.142.69.7
PING 141.142.69.7 (141.142.69.7) 56(84) bytes of data.
64 bytes from 141.142.69.7: icmp_seq=0 ttl=60 time=0.753 ms
64 bytes from 141.142.69.7: icmp_seq=1 ttl=60 time=0.271 ms

--- 141.142.69.7 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.271/0.512/0.753/0.241 ms, pipe 2

[root at t3honest5 lustre]# ping -c2 141.142.69.8
PING 141.142.69.8 (141.142.69.8) 56(84) bytes of data.
64 bytes from 141.142.69.8: icmp_seq=0 ttl=60 time=1.61 ms
64 bytes from 141.142.69.8: icmp_seq=1 ttl=60 time=0.248 ms

--- 141.142.69.8 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.248/0.930/1.613/0.683 ms, pipe 2
[root at t3honest5 lustre]#


I was wondering if anyone had any ideas where to start looking?

Thanks,
Chad
--
Chad Kerner - ckerner at ncsa.uiuc.edu
Systems Engineer, Storage Enabling Technologies
National Center for Supercomputing Applications
http://www.ncsa.uiuc.edu/~ckerner



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