HP StorageWorks Scalable File Share - Manual (Page 238)

Troubleshooting 9–14
9.23.2 Nodeset and Node ID information
To determine what nodes are visible to a node on the Quadrics interconnect, enter the following command:
# cat /proc/qsnet/ep/rail0/nodeset
[7-10]
In this example, the output indicates that nodes 7, 8, 9, and 10 are visible to the node.
Note that the
/proc/qsnet
area is created when the
qsnet
module is loaded. Similarly, the
/proc/qsnet/elan
area is created when the
elan
module is loaded, the
/proc/qsnet/ep
area is
created when the
ep
module is loaded, and so on.
To find the ID (on the Quadrics interconnect) of a node, and to determine how many ports are on the switch,
enter the following command:
# cat /proc/qsnet/ep/rail0/state
running NodeId=10 NumNodes=16
In this example, the output indicates that the ID of this client node on the Quadrics interconnect is
10
, and
that there are sixteen ports on the switch.
To determine whether the nodeset has stabilized after booting, enter the following command:
# cat /proc/qsnet/ep/rail0/cluster
[8-9][11-11] Online Connected=1
[0-7][12-15] Online Connected=1
9.23.3 Checking active Lustre communications over the Quadrics interconnect
The
kernel comms
module provides active transaction descriptors (
active_tx
) that may be useful for
debugging purposes. To view
active_tx
information, enter the following command:
# lctl --net elan active_tx
9.23.4 Gathering debugging information
The script shown in the following example can be used to gather debugging information about the Quadrics
interconnect:
# qsnetdebug debug /tmp/debug.log &
# echo epcomms > /proc/qsnet/ep/rail0/display
The
display
entry in the
kernel comms procfs
module supports the following commands:
epcomms
Displays
epcomms
state.
status
Displays cluster membership global state information.
segs
Displays cluster membership segment state.
rail
Displays cluster membership spanning tree.
nodes
Displays cluster membership node state.