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Trade-offs of DECram disks?

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The Question is:

 I want to recommend using DECram for a performance gain. But I am geting push
 back from production, whom claim there is a reliabiliy problem with it. Will
 you please comment on this please.
thanks in advance
paul harrison

The Answer is :

  The Compaq DECram product works correctly -- the OpenVMS Wizard is
  unfamiliar with the specifics of the reported "reliability problem",
  but will assume that this is a reference to the lack of backing
  storage for the contents of the DECram device, and thus the volatility
  of the data over a system failure.  (Save for the case of shadowing
  the DECram device with a physical disk of the same number of blocks,
  of course.)
  Alternatives to using host-based RAM disks such as DECram include
  database caching, RMS global buffers, controller caching, and
  faster magnetic or solid-state disks.
  Please see topics 2380 and 4035 for related discussions.

answer written or last revised on ( 30-MAR-2000 )

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