On Jul 14, 2005, at 2:01 AM, Akash Jain wrote:

I am in very strange situation where my Oracle backup sometimes
completes in
1 hour and sometimes it took only 16 minutes for same data.

You may have encountered an illustration of the value of SAN versus
shared LAN, where all manner and volume of traffic may appear on
highly accessible LANs, slowing throughput for your transfer in
amongst all the other data on the wire.

   Richard Sims