[Lustre-discuss] OST for Lustre

[Johnlya]

On Tue, 2008-06-03 at 20:45 , "Brian J. Murrell"
<Brian.Murr... at Sun.COM> wrote:
> On Mon, 2008-06-02 at 20:06 -0700, Johnlya wrote:
> > sorry.
> > below message is correct:
> >     I mean that I want to test for changing OSS when OSS is down.
> > And
> > other servers (e.g MDS, other OSS) should not restart.  The OST data
> > is shared with one disk by ISCS.
>
> It sounds like you want failover.  Please see our operations manual for
> a discussion of failover and how to implement it.
>
> b.
>
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MDS_MASTER> mkfs.lustre --fsname=test --mdt --mgs --reformat --
failnode=MDS_SLAVER /dev/sda1
MDS_MASTER> mount.lustre /dev/sda1 /mnt/test/mdt

OSS_MASTER1> mkfs.lustre --fsname=test --ost --reformat --
mgsnode=MDS_SLAVE at tcp0 --mgsnode=MDS_MASTER at tcp0 --
failnode=OSS_SLAVER1 /dev/sdb1
OSS_MASTER1> mount.lustre /dev/sdb1 /mnt/test/ost1

OSS_MASTER2> mkfs.lustre --fsname=test --ost --reformat --
mgsnode=MDS_SLAVE at tcp0 --mgsnode=MDS_MASTER at tcp0 --
failnode=OSS_SLAVER2 /dev/sdb2
OSS_MASTER2> mount.lustre /dev/sdb1 /mnt/test/ost2


CLINET> mount -t lustre MDS_SLAVE at tcp0:MDS_MASTER at tcp0:/test /mnt/
test/
client/


I test it and It can work.
when the OSS_MASTER2 and OSS_SLAVER2 machine is all down( The OST data
is shared with one disk by ISCS), I want to relpace a new machine (IP
address configuration not different from old OSS). The Client can
mount successfully, but it can't work.
thank you!