[Linux-cluster] Types of file locking support in GFS

[Elliot Moore]

On 6 Dec 2007, at 13:45, Elliot Moore wrote:
> Hi,
>
> I'm trying to setup activemq with master and slave.
> According to http://activemq.apache.org/shared-file-system-master-slave.html 
> , you can use a SAN to hold a lockfile for multiple brokers to watch.
> But the SAN filesystem must support exclusive file locks.
>
> OCFS2 only supports locking with 'fcntl' and not 'lockf and flock',  
> therefore mutex file locking from Java isn't supported. (both  
> brokers think they have
> an exclusive lock on the lockfile!)
>
> Does Redhat GFS support 'lockf and flock' as well as fcntl ?


FYI
got a response from redhat, yes
more information @ http://sources.redhat.com/cluster/faq.html#gfs_vs_ocfs2