Lustre 1.6 Operations Manual

To see which node is serving that OST, run:
$ cat /proc/fs/lustre/osc/*databarn-ost3*/ost_conn_uuid
NID_oss1.databarn.87k.net_UUID
The above also works with connections to the MDS - just replace osc with mdc and
ost with mds in the above command.
I need multiple SCSI LUNs per HBA - what is the best way to do this?
The packaged kernels are configured approximately the same as the upstream
RedHat and SuSE packages.
Currently, RHEL does not enable CONFIG_SCSI_MULTI_LUN because it is said to
causes problems with some SCSI hardware.
If you need to enable this, you must set 'option scsi_mod max_scsi_luns=xx' (xx is
typically 128) in either modprobe.conf (2.6 kernel) or modules.conf (2.4 kernel).
Passing this option as a kernel boot argument (in grub.conf or lilo.conf) will not
work unless the kernel is compiled with CONFIG_SCSI_MULT_LUN=y
Can I run Lustre in a heterogeneous environment (32-and 64-bit
machines)?
As of Lustre v1.4.2, this is supported with different word sizes. It is also supported
for clients with different endianness (for example, i368 and PPC).
One limitation is that the PAGE_SIZE on the client must be at least as large as the
PAGE_SIZE of the server.
In particular, ia64 clients with large pages (up to 64KB pages) can run with i386
servers (4KB pages). If i386 clients are running with ia64 servers, the ia64 kernel
must be compiled with 4kB PAGE_SIZE.
How do I clean up a device with lctl?
How do I destroy this object using lctl based on the following information:
lctl > device_list
0 UP obdfilter ost003_s1 ost003_s1_UUID 3
1 UP ost OSS OSS_UUID 2
2 UP echo_client ost003_s1_client 2b98ad95-28a6-ebb2-10e4-46a3ceef9007
Appendix D Lustre Knowledge Base D-19