HP OpenVMS Systems

Remote BACKUP over WAN (FDDI) links?

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The Question is:

 
Does Compaq has a backup solution that will allow
me to do backups accross a WAN network or to
a remote site using FDDI lines, if so what is the recommend
bandwidth ?
 
 

The Answer is :

 
  FDDI is a fully supported cluster interconnect, and clusters spanning
  distances of 150 miles (and up to 500 miles with the disaster-tolerant
  cluster configurations) are possible and are supported over these FDDI
  communications links.  In other words, you may well be able to operate
  a standard OpenVMS Cluster over this link, depending on the distances
  and configurations involved.
 
  With a disaster-tolerant cluster configuration, you can avoid the need
  for remote backups, keeping both sites running entirely in parallel
  and the data current in both sites using existing tools such as volume
  shadowing and RMS journaling.  If either site (lobe) should fail, the
  other can be configured to take up the load and to continue the operations.
 
  Existing OpenVMS BACKUPs -- using DECnet-Plus over IP -- can also operate
  to remote disks, either in a cluster or outside it.  Other solutions are
  also available.  BACKUP will operate over an FDDI or other IP link, or
  over a traditional DECnet point-to-point link.
 
  Recommended bandwidth for the link depends entirely on the expected load
  and on the completion (time) requirements, as well as other traffic on
  the link competing for bandwidth, etc.
 
  Other products are under development in this area, to permit on-line or
  near-line BACKUPs.  (Traditional OpenVMS BACKUP requires the entire volume
  be consistent and quescient over the entire window of the BACKUP operation.
  This is obviously not always feasible at all sites.)  Other tools that are
  available in this area include disk volume shadowing and RMS journaling.
 

  

     

     
answer written or last revised on ( 12-JUL-1999 )
     
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