[Lustre-discuss] Lustre 1.6.5.1 on the box with 2 interfaces

[Klaus Steden]

Hi Lukas,

Do you want to use these interfaces together as a logical unit? The syntax
below would construct two separate LNET networks.

Additionally, you would need to qualify the mount path on the client side to
bind Lustre to a specific LNET instance, i.e. 'mount /mnt/lustre
192.168.1.1 at tcp0:/lustre', or else it will default to the first available
LNET instance. The order doesn't really matter in the module declaration,
though.

Looking at my OSS nodes, I can see entries in /proc/fs/lustre/devices, as
well as in the output of 'df'. Did you specify a file system type? Normally
when mounting either an OST or an MDT, you need to provide a '-t lustre'
argument to 'mount', or list that as the fstype in /etc/fstab. Otherwise,
I'm assuming it mounts the device as ext3, which works, but isn't usable by
Lustre.

hth,
Klaus

On 9/24/08 12:41 PM, "Lukas Hejtmanek" <xhejtman at ics.muni.cz>did etch on
stone tablets:

> Hello,
> 
> I have some difficulties to setup a server acting as metadata server and OST
> server. The box has two interfaces, eth0 and eth2. eth0 is the primary
> interface and has the ip which is associated with the hostname.
> 
> However, I would like to use the eth2 interface for Lustre.
> In an ideal case, I would like to use Lustre on both interfaces. But for now,
> it would be sufficient to use just the non-primary one.
> 
> I use
> options lnet networks="tcp0(eth2),tcp1(eth0)"
> 
> I created the metadata:
> /usr/local/lustre/sbin/mkfs.lustre --fsname=l_smaug2 --reformat --mdt --mgs
> /dev/Scratch_VG/Scratch_1
> 
> I mounted the mdt:
> mount /dev/Scratch_VG/Scratch_1 /mnt/lustre/mdt
> 
> Then I created the OST
> /usr/local/lustre/sbin/mkfs.lustre --fsname=l_smaug2 --reformat --ost
> --mgsnode=192.168.1.1 at tcp0 /dev/Scratch_VG/Scratch_2
> 
> I mounted it:
> mount /dev/Scratch_VG/Scratch_2 /mnt/lustre/ost0
> 
> However, cat /proc/fs/lustre/devices shows that no OST is attached at all.
> 
> What am I missing?
> 
> eth0 has a public address,
> eth2 has the 192.168.1.1 address.