Lustre 1.6 Operations Manual

Note – CluManager requires two 10M LUNs visible to each member of a failover
group.
For more information, see:
http://www.redhat.com/docs/manuals/enterprise/RHEL-3-
Manual/cluster-suite/
For more download, see:
http://ftp.redhat.com/pub/redhat/linux/enterprise/3/en/RHCS/i386
/SRPMS/
In the future, we hope to publish more information and sample scripts to configure
Heartbeat and CluManager with Lustre.
Is there a way to tell which OST a process on a client is using?
If a process is doing I/O to a file, use the lfs getstripe command to see the OST to
which it is writing.
Using cat as an example, run:
$ cat > foo
While that is running, on another terminal, run:
$ readlink /proc/$(pidof cat)/fd/1
/barn/users/jacob/tmp/foo
You can also ls -l /proc//fd/ to find open files using Lustre.
$ lfs getstripe $(readlink /proc/$(pidof cat)/fd/1)
OBDS:
0: databarn-ost1_UUID ACTIVE
1: databarn-ost2_UUID ACTIVE
2: databarn-ost3_UUID ACTIVE
3: databarn-ost4_UUID ACTIVE
/barn/users/jacob/tmp/foo
obdidx objid objid group
2 835487 0xcbf9f 0
The output shows that this file lives on obdidx 2, which is databarn-ost3.
D-18 Lustre 1.6 Operations Manual • September 2008