Lustre discuss - Jun 2009 - a simple question

Hello,
After installing lustre, how can I test it quickliy if it is installed
correctly ?
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Onane:

One of the first commands I issue is lfs df -h to check my newly mounted
filesystem.  I mount my clients manually with a command similar to this:

mount -t lustre 192.168.0.7 at tcp0:/ioio /mnt/ioio and then after it mounts in
a minute or two I issue lfs df -h and look at the output.  While it is mounting
I watch the output of tail -f /var/log/messages in a separate terminal.  If
it''s all good I mount the remaining clients and do some random copies
to the new file system.  Your looking for similar output on your client
machines.

[root at lustreone www.workwanted.ca]# lfs df -h
UUID                     bytes      Used Available  Use% Mounted on
ioio-MDT0000_UUID         1.6T    683.3M      1.5T    0% /mnt/ioio[MDT:0]
ioio-OST0000_UUID         2.7T     76.1G      2.5T    2% /mnt/ioio[OST:0]
ioio-OST0001_UUID         2.7T     61.7G      2.5T    2% /mnt/ioio[OST:1]

filesystem summary:       5.4T    137.8G      5.0T    2% /mnt/ioio

Next check how many inodes you have available for the system:

[root at lustreone www.workwanted.ca]# lfs df -ih
UUID                    Inodes     IUsed     IFree IUse% Mounted on
ioio-MDT0000_UUID       412.3M      5.0M    407.3M    1% /mnt/ioio[MDT:0]
ioio-OST0000_UUID       174.7M      2.6M    172.0M    1% /mnt/ioio[OST:0]
ioio-OST0001_UUID       174.7M      2.3M    172.4M    1% /mnt/ioio[OST:1]

filesystem summary:     412.3M      5.0M    407.3M    1% /mnt/ioio

The command lfs has quite a few options you might find useful. 

Arden

--- On Thu, 6/18/09, Onane <onane at uludaglar.com> wrote:
> From: Onane <onane at uludaglar.com>
> Subject: [Lustre-discuss] a simple question
> To: lustre-discuss at lists.lustre.org
> Date: Thursday, June 18, 2009, 1:52 AM
> Hello,
> After installing lustre, how can I test it quickliy if it
> is installed correctly ?
> 
> 
> -----Inline Attachment Follows-----
> 
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
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>

Onane wrote:
> Hello,
> After installing lustre, how can I test it quickliy if it is installed 
> correctly ?
> 
# modprobe -v lustre

If the modules load without error this is good.

# lctl network up
# lctl list_nids

This shows you that LNET can run.

Beyond that, create a filesystem. Examples at manual.lustre.org.

One thing we do lot''s - create a quick scratch filesystem using
loopback
devices for OST and MDS/MGS. You can do that on one node. See llmount.sh 
in the lustre-source package for an example.

cliffw
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