HP OpenVMS Systems

Hot sites and disaster recovery?

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The Question is:

 
  Does OpenVMS provide any replication services?
 
  We are currently setting up a hot disaster recovery site.  Between our
live and disaster site we have IP connectivity via a T1 and a couple Cisco
routers. I have solutions for our NT, Novell, and Solaris systems, but I'm
having trouble finding a solutio
n for OpenVMS system.  Please help.
 
Thanks,
John
 
 

The Answer is :

 
 
  OpenVMS provides continuous computing -- multiple sites (lobes) can all
  be operating in the same cluster, and the cluster can tolerate problems
  and disasters that affect a particular lobe of the cluster.  Sites can
  be separated by significant distances, distances of multiple hundreds of
  kilometers are both possible and supported.  Clusters are supported over
  Ethernet and faster links -- disaster-tolerant sites typically use FDDI.
 
  Various off-line recovery solutions -- the more traditional "hot site"
  configuration -- using tools such as BACKUP, and potentially using newer
  technologies and tools presently under development.
 
  Reliable transaction packages such as the reliable transaction router
  (RTR), volume shadowing, RMS journaling, and many other packages are
  also available.
 
  As with most any other computing-related situation, the appropriate
  system configuration and the necessary products will depend highly on
  what your specific requirements are.
 
  --
 
  A T1 communications link is a soda-straw by current network technology
  standards -- at 1.544 megabits per second, it is significantly less than
  the 10 megabits per second bandwidth of a classicly slow Ethernet network.
  Routing over the link will add additional latency, obviously.
 
 
  The following datalink information was gathered from various sources:
 
     Data          Megabits      What
     Link          per second    is it?
     ----          ----------    ------
 
     DS0            64Kbps       One voice line
     T1 (DS1)        1.544       Twenty-four voice lines
     E1              2.048       32 DS0 links (European)
     T1C (DS1C)      3.152       Two DS1 connections
     T2 (DS2)        6.312       Four T1 links
     E2              8.448       Four E1 links (European)
     Ethernet       10.000       Slow
     E3             34.368       Sixteen E1 links (European)
     T3 (DS3)       44.736       Twenty-Eight T1 links
     OC-1 (STS-1)   51.84        SONET; 672 voice channels
     DS3C           90.631       A pair of DS3 links
     FDDI          100.000       Not So Slow
     E4            139.264       Sixty-four E1 links (European)
     DS4E          139.264       Eighty-four T1 links
     OC-3 (STS-3)  155.52        Nice; SONET; 2016 voice links
     T4 (DS4)      274.176       Six T3 lines
     E5            565.148       7680 voice links
 
 
 

  

     

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