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Volume Shadowing, Mirroring, and Merges?

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The Question is:

 
Pros and Cons of Shadowing vs Mirroring. We currently use Shadowing
on our cluster. The merge operations after a problem are killing us for
up to 18 hours due to the size of some Database Stripe sets. Would
"Mirroring" work any different after a problem?
 
Thanks,
 
John Palmer
The Sabre Group

The Answer is :

 
  OpenVMS typically considers Volume Shadowing to be the same as
  Disk Mirroring -- two names for the same operation.
 
  Information on the particular problems around the merge and around
  the event triggering the merge will be of interest -- please contact
  the Compaq Customer Support Center for assistance.
 
  The OpenVMS Wizard would recommend loading the current ECO kit
  for shadowing as a first step, and considering various software-
  and hardware-based options based on the assumption that host-based
  volume shadowing is presently in use.

  
     
     answer written or last revised on ( 10-FEB-1999 )
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