Q-Logic IB6054601-00 D Manuel D’Utilisation

2 – InfiniPath Cluster Administration

Configuring ssh and sshd Using shosts.equiv

IB6054601-00 D

2-15

Q

If there is output, you should look at the output from this command to determine if 
it is configured:

$ /sbin/ifconfig -a

Finally, if you need to find which InfiniPath and OpenFabrics modules are running, 
try the following command:

$ lsmod | egrep ’ipath_|ib_|rdma_|findex’

InfiniBand status can be checked by running the program 

ipath_control

. Here is 

sample usage and output:

$ ipath_control -i

$Id: QLogic Release2.0 $ $Date: 2006-09-15-04:16 $

00: Version: Driver 2.0, InfiniPath_QHT7140, InfiniPath1 3.2, 

PCI 2, SW Compat 2

00: Status: 0xe1 Initted Present IB_link_up IB_configured

00: LID=0x30 MLID=0x0 GUID=00:11:75:00:00:07:11:97 Serial: 

1236070407

Another useful program is 

ibstatus

. Sample usage and output is as follows:

$ ibstatus

Infiniband device ’ipath0’ port 1 status:

        default gid:     fe80:0000:0000:0000:0011:7500:0005:602f

        base lid:        0x35

        sm lid:          0x2

        state:           4: ACTIVE

        phys state:      5: LinkUp

        rate:            10 Gb/sec (4X)

For more information on these programs, See 

 and 

.

Running MPI programs on an InfiniPath cluster depends, by default, on secure shell 

ssh

 to launch node programs on the nodes. Jobs must be able to start up without 

the need for interactive password entry on every node. Here we see how the cluster 
administrator can lift this burden from the user through the use of the 

shosts.equiv

 

mechanism. This method is recommended, provided that your cluster is behind a 
firewall and accessible only to trusted users.

Later, in 

, we show how an individual user can accomplish this end 

through the use of 

ssh-agent

.