[DRBD-user] DRBD local sync ?

Kristinn Soffanias Runarsson soffanias at gmail.com
Sat Apr 25 01:07:26 CEST 2009

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On Fri, Apr 24, 2009 at 10:39 PM, Tom Brown <tbrown at baremetal.com> wrote:

> On Fri, 24 Apr 2009, Kristinn Soffanias Runarsson wrote:
>
>  Yeah I could do pvmove, that is what I will be using on machines that are
>> using LVM.  But most of them are just using plain devices.  And LVM
>> doesn't
>> support non-destructive import of a device into LVM (but Solaris SVM does
>> :)
>> and I've had good results with that :)
>>
>> so drbd out of the question? :)
>>
>
> I have no idea. I don't know how you're consuming the storage, whether you
> can tolerate a reboot or two, whether this is the root filesystem of a
> device that is literally booting off it (as compared to a virtual machine
> using it for /).
>
> MD _might_ be able to help. You can build a mirror of an existing device,
> but you need to be able to tell your storage "consumer" to switch from using
> /dev/sda1 to /dev/md0 ... same as you would for drbd. The only real
> difference between using drbd and md is that drbd wants to sync to a remote
> server. MD wants to sync two local devices... but one or both of those could
> be network attached storage. lookup mdadm (the build option) if that seems
> interesting.
>
> That said, I've neither done this, nor do I have time to test it.
>
> -Tom
>

Yeah I can survive a few reboots, but not lengthy outages.  As far as MD is
concerned.. it cannot consume a device that already contains data without
destroying it.

soffi
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20090424/cd2ba138/attachment.htm>


More information about the drbd-user mailing list