[Lustre-discuss] OST for Lustre

[Johnlya]

On Tue, 2008-06-03 at 3:14 , "Brian J. Murrell"
<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.