Pool Lee, Mr <14117614@xxxxxxxxx> wrote: > > What about software fencing? Is it really nesasary to be hardware! > > Is there a difference between lutre/cfs, the product that sun uses, > and gfs? > > I'm planning to do mostly numerical work with the cluster and thus I > would like all the machines to be able to retrieve data, as if it > was local on the machine. NFS is very limited in this regard because > we intend on using vast arrays of matrices, that can be up to 1-2 > Gig. > > I was hoping to implement GFS since all the machines are already > setup, without the hardware fencing though. The thing with fencing is that you have to choose a method which is supported by your configuration. These are the basic ways to fence a cluster: Manual fencing - nothing special needed, but it doesn't work well in a production environment. Power fencing - Forcibly reboots a misbehaving node. Requires a compatible power switch. Network fencing - Blocks the misbehaving node's access to the cluster resources. Requires a compatible switch (usually used with fiber switches). Software fencing - Notifies storage management software to block access to the misbehaving node. Requires compatible storage configuration. I believe this is only supported with GNBD storage servers. Your choices are limited by your configuration. The only options that can be used with any configuration are manual and power. I don't know about the differences between the RedHat Clustering and lutre/cfs. I DO know that any type of clustering will require fencing of some sort. -- Bowie -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
