RES: [Linux-cluster] GFS Performance advise

[Lon Hohberger]

On Wed, 2006-07-26 at 09:36 -0300, Leonardo Rodrigues de Mello wrote:
> Gfs is only necessary if you have two or more machines that access (READ+WRITE) the filesystem at the same time. GFS will create and manage a global lock of the filesystem, and other things to make shure the filesystem can be shared among the cluster nodes without filesystem corruption.
> 
> beside that fact, if you have active/passive you can use ext3 without any problem. you can use gfs no_lock too. if you are having problems with gfs no_lock maybe because something is misconfigured in your setup. You CANT use gfs no_lock the same way you use gfs with dlm or gulm because if you do that you can get a filesystem corruption... i dont know if gfs permit one configuration like that. 

Note that both read caching (in all cases) and write caching (in the
case of the single read/write node) while using ext3 will cause observed
inconsistencies in the file system (and files), even though file system
corruption may not be the end result.

-- Lon