[Lustre-discuss] Am I missing something?

[Timh Bergström]

Hi,

Just got a smaller Lustre system running with 1 mdt/mgs and 2 ost's. On the
osts i've added 1x10GB disk and 1x20GB disk
 on each system and formatted and mounted them as /mnt/ost1-4 (ost1) and
/mnt/ost2-3 (ost2). I've also mounted the lustre system on the mdt/mgs
server with mount -t lustre x.y.n.p at tcp:/testfs /mnt/lustre. So far so good,
however df -h only reports 9/60GB avail where lsf df -h reports 54.4Gavailable.

172.16.x.y at tcp:/testfs
                       60G   50G  9.0G  85% /mnt/lustre

vs

filesystem summary:      59.1G      4.7G     54.4G    7% /mnt/lustre

--

lustre-client:/mnt/lustre# du -hcs
4.0K    .
4.0K    total

I cant find anything on this in the lists or manual, but do  you have to
have equal size disks to get all the usable space available to the system
mounting lustre? Is this somehow connected to stripe-size or some automatic
failover settings. My original intent was to create a large storage area
using lustre for numerous clients to mount and use as diskspace.

-- 
Timh Bergström
System Administrator
Diino AB - www.diino.com
:wq
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