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Re: RES: [Linux-cluster] DRBD in Active-active mode



On Mon, 2006-08-07 at 16:09 -0300, Leonardo Rodrigues de Mello wrote:
> Hi everyone,
> 
> Lon you are right for the stable version of DRBD the version 0.7. But DRBD actualy has support for active-active setup in the development version 0.8. There is significant changes between this versions, the entire roadmap can be read at:
> http://svn.drbd.org/drbd/trunk/ROADMAP

Awesome. :)

> 
> I have done some investigations and tests with DRBD 0.8 in active-active setup with two nodes and OCFS2 and with GFS. This was for one project i was doing related to oracle Rac 10g. 
> 
> I have produced one documentation in portuguese that shows how to setup and use drbd in active-active with ocfs2. the link is: 
> http://guialivre.governoeletronico.gov.br/seminario/index.php/DocumentacaoTecnologiasDRBDOCFS2
> 
> I have discovered in my investigations that ocfs2 is more unstable that GFS. I have a several kernel panics with ocfs2 under high loads on the machine, but no one with GFS.  
> 
> I have the instalation of GFS documented at, one performance test i have done some time ago: 
> http://guialivre.governoeletronico.gov.br/mediawiki/index.php/TestesGFS
> (here i use clvm, and gnbd)
> 
> 
> The problem of drbd is that actualy you can use just two machines, if you want to use more you need to use the commercial version drbd+. 

Wow, great information.  Thanks!

-- Lon


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