Re: High Availability / Clustering

[Jeroen Vriesman <jeroen.vriesman@experian.nl>]

Oracle made orafw, multipath access to disk from two machines with firewire disks.

Save you a lot of money if you use this, together with heartbeat for your storage.


On Thu, 10 Apr 2003 21:01:58 -0400
Lee <lee_hoffman@brown.edu> wrote:

> >> 4) 1 Master Server Cluster using shared storage: This seems like the
> >> only viable solutions.
> >
> > If you honestly believe this, then your definition of "high 
> > availability" is
> > somewhat different from the rest of the world's. Putting a bunch of 
> > front
> > ends onto a single shared data-store does not give high availability. 
> > It
> > practically assures lower availability, because your shared storage is 
> > now a
> > single point of failure. If it goes down, it doesn't matter how many 
> > servers
> > are in your cluster, they're all hosed. This idea is pure folly. There 
> > are of
> > course valid reasons for using tightly coupled server clusters with 
> > shared
> > storage, but high availabilty is definitely not one of them.
> >
> 
> When I said shared storage, i meant two redundant SANs each cross 
> connected to all the cluster boxes, which removes all single sources of 
> failure.
> 
> L
>