Thank you all.<br>I upgraded to 'drbd-8.3.0',so now mirroring operation is fast.<br>and it is true that LVM on remote primary side cannot sense that it is allocatable.<br><br><div class="gmail_quote">On Tue, May 5, 2009 at 10:55 PM, Matthew Wild <span dir="ltr"><<a href="mailto:M.Wild@rl.ac.uk">M.Wild@rl.ac.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im">George Negoita wrote:<br>
> Hello!<br>
><br>
> On Tue, May 5, 2009 at 2:21 PM, himanshu padmanabhi<br>
> <<a href="mailto:himanshu.padmanabhi@gmail.com">himanshu.padmanabhi@gmail.com</a>> wrote:<br>
>> I faced 2 problems on other primary side,<br>
>><br>
>> 1. drbdlv1 has attributes as '-wi---' and not '-wi-a-'.I need to do<br>
>> 'lvchange' here to activate it.<br>
>> Is there any way that I can maintain their active state here?<br>
>><br>
>> 2. PV,VG and LV are appears quite late,after 3-4 minutes.Why is this much<br>
>> delay,operation being synchronous?<br>
><br>
> Because LVM is unaware of the changes you made on it's underlying<br>
> device (drbd physical volume). If you are using dual-primary mode, you<br>
> should use clvm, which is a lvm cluster extension.<br>
><br>
> I don't know if this works!! If you don't want to use clvm, you can<br>
> try to bring down the second node, create the volumes on the first<br>
> node, then bring up the second node and run pvscan/vgscan/lvscan. This<br>
> should work as long as you don't make any other changes to the<br>
> volumes. Maybe someone can tell us if i'm wrong here.<br>
><br>
</div>I've just been playing with a 4TB drbd volume using a dual primary<br>
configuration, openais and clvmd on openSuSE 11.1. Things seem to be OK<br>
so far. It appears that openais may have some issues though :-(, due to<br>
it's youth, and the clvm stuff doesn't have a startup script, so will<br>
need to play around a bit.<br>
<br>
Of course you still can't use the two primaries without either a<br>
clustered file system or as I hope to do, failover for iscsi based Xen<br>
domUs on separate dom0 servers with multipath.<br>
<font color="#888888"><br>
Matthew<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>---------------------------------<br>Thanks and Regards,<br>Himanshu Padmanabhi<br><br>