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



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





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