From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Nowoczynski Date: Wed, 20 Oct 2010 12:46:56 -0400 Subject: [Lustre-devel] Queries regarding LDLM_ENQUEUE In-Reply-To: <90E83093-2655-4C70-ACEA-E75D7E8C5511@oracle.com> References: <4CBEA415.80307@gmail.com> <9C26CBA7-8DBD-4875-8E14-FB663B749096@oracle.com> <4CBEA8A9.9080802@gmail.com> <00d001cb705a$fd64cb80$f82e6280$@com> <90E83093-2655-4C70-ACEA-E75D7E8C5511@oracle.com> Message-ID: <4CBF1D00.9080402@psc.edu> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org > The name_to_handle() only needs to be called on a single node, and > open_by_handle() is called on the other nodes. I agree that this > doesn't avoid the full O(n) RPCs for the open itself but at least it > does avoid the full path traversal from every client and on the > MDS (replacing it with an MPI broadcast of the handle). Andreas, excuse my ignorance, but why does open_by_handle() need to issue an RPC? If it's to obtain the layout, couldn't the layout be encoded into the 'handle'? p > > Cheers, Andreas > ------------------------------------------------------------------------ > > _______________________________________________ > Lustre-devel mailing list > Lustre-devel at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-devel >