[DRBD-user] DRBD, Informix and raw devices

[Christof Amelunxen]

Hi Clive,

thanks for your reply.

Am Mo, den 31.10.2005 schrieb Clive Eisen um 16:17:
> >
> >we plan to use DRBD and heartbeat to cluster an Informix DB and we would
> >like to use raw devices to store the data on.
> >
> >Has anybody ever tried using Linux raw devices on top of DRBD or could
> >one of the technical experts around tell me if this is possible at all?
> >
> >  
> >
> I have done it as a demo, not in production.
> 
> It works fine with raw and heartbeat although depending on your distro 
> you may have to hack the 'raw' script to actually work
> 
> http://groups.google.co.uk/group/novell.support.suse.linux.professional/browse_thread/thread/62b8da97916987dd/b11209c7c384fa9e?lnk=st&q=%22clive+eisen%22+raw&rnum=4&hl=en#b11209c7c384fa9e

Is it necessary to have the raw devices be managed by heartbeat? I was
thinking about binding the raw devices statically to the drbd
major/minor numbers. 

> Later informix versions open the chunks as 'raw' without you having to 
> go through these hoops, and will also use KAIO if possible

But does that make any difference in practice? At least for me, the
"drbd administrator"?

regards,
Christof