On Wed, Feb 18, 2009 at 1:24 AM, Pavel A Tsvetkov <p...@technoserv.ru>wrote:
> > Hello all! > > Just one interesting question for me and perhaps for other people... > > There is some application running on VxFS (officially supported). We want > to use this application on two nodes in parallel. > It means we must use CVM and CFS. > Can we use CFS instead of VxFS for that application? No, you can't. You need to have a locking mechanism which can avoid corruption (like the oracle database does when you set directio): this locking mechanism is one central piece of cluster file system. VxFS, like any other fs, uses Posix single-writer lock. In your case, this lock on a node 1 doesn't have any knowledge of the similar lock on the node 2, thereby leading to corruption.
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