RES: [Linux-cluster] GFS Performance advise
lhh at redhat.com
Thu Jul 27 17:03:31 UTC 2006
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.
More information about the Linux-cluster