[Lustre-discuss] OST for Lustre

[Johnlya]

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.


>
> <Brian.Murr... at Sun.COM> wrote:
> > On Fri, 2008-05-30 at 03:08 -0700, Johnlya wrote:
> > > 1.First, I start one MDS on one machine and start two OST on another
> > > OSS machine,the first OST data is shared with one disk by ISCSI.
>
> > >       2.Second, I stop(umount) one OST on OSS machine and deactive the
> > > OST on MDS machine(lctl conf_param test-OST0000.osc.active=0);
>
> > >       3.Third,I install new machine and install Lustre, ISCSI. I
> > > start(mount) the first OST by ISCSI and active the OST on MDS
> > > machine(lctl conf_param test-OST0000.osc.active=1).It can work(mount
> > > successfully). But I find the OST is inactive device on CLIENT machine
> > > by command 'lfs df -h' and list files failed.
>
> > What are you trying to accomplish with these steps?  It sounds like you
> > are simply trying to move the OST "test-OST0000" from it's existing OSS
> > to a new one, is this correct?  If so, you can follow the process for
> > "Changing a server nid" in the mountconf wiki athttp://wiki.lustre.org/index.php?title=Mount_Conf#Changing_a_server_nid.
> > I would suggest you read about the general Writeconf section that that
> > procedure is a part of.
>
> > b.
>
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>
> Thank you!
>     if using the command 'Writeconf', all servers should be restarted.
>     I mean that I want to test for changing OST when OST is down.  And
> other servers (e.g MDS, other OSS) should not restart.
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