That could be done with mysql's clustered in-memory database mode without sharing anything through a filesystem - the mysql daemons will communicate the data directly through tcpip. -----Original Message----- From: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Lin Shen (lshen) Sent: Thursday, January 11, 2007 3:53 PM To: linux clustering Subject: RE: tmpfs on top of GFS We're trying to use it as an in-memory DB (for its speed), but need to share the DB contents among nodes. lin > -----Original Message----- > From: linux-cluster-bounces@xxxxxxxxxx > [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Michael Will > Sent: Thursday, January 11, 2007 3:48 PM > To: linux clustering > Subject: RE: tmpfs on top of GFS > > Whats the intent here? > > tmpfs is meant to be node-local temporary storage by design. > What are you trying to use it for? > > Michael > > -----Original Message----- > From: linux-cluster-bounces@xxxxxxxxxx > [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Lin Shen > (lshen) > Sent: Thursday, January 11, 2007 3:45 PM > To: linux clustering > Subject: RE: tmpfs on top of GFS > > > > > -----Original Message----- > > From: linux-cluster-bounces@xxxxxxxxxx > > [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Bryn > M. Reeves > > Sent: Thursday, January 11, 2007 2:50 PM > > To: linux clustering > > Subject: Re: tmpfs on top of GFS > > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > Lin Shen (lshen) wrote: > > > If I mount a tmpfs filesystem on top of a GFS based root > > filesystem at > > > say /tmp, can I safely share the contents under /tmp among > > the nodes? > > > > > > lin > > > > > > -- > > > Linux-cluster mailing list > > > Linux-cluster@xxxxxxxxxx > > > https://www.redhat.com/mailman/listinfo/linux-cluster > > > > Maybe I misunderstand your question, but tmpfs will not be able to > > share its contents between nodes the way GFS does. > > > > The tmpfs filesystem uses space available in the pagecache & swap > > areas as a backing store instead of a dedicated block device. > > > > Mounting it on top of a GFS root at /tmp is only going to > be visible > > on a single node. Each node can do that and have its own > tmpfs storage > > > available, but this won't make the /tmp mounts shared between the > > cluster nodes. > > > > See Documentation/filesystems/tmpfs.txt in the kernel > sources for more > > > details. > > > > Kind regards, > > > > Bryn. > > > > -----BEGIN PGP SIGNATURE----- > > Version: GnuPG v1.4.5 (GNU/Linux) > > Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org > > > > iD8DBQFFpr8q6YSQoMYUY94RAkCWAKC6b+VWxyW5ZMqJz+RuMJ5jCV5UTgCfYd4Z > > DPDFOCAEPU0Ukj8YFky9zEo= > > =IHfq > > -----END PGP SIGNATURE----- > > > > -- > > Linux-cluster mailing list > > Linux-cluster@xxxxxxxxxx > > https://www.redhat.com/mailman/listinfo/linux-cluster > > > > I see. Can I use NFS to export tmpfs from one node to another then? Or > are there any other better ways to share a tmpfs among the nodes. > > lin > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
