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RMS Sequential File Capacity Limits?

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The Question is:

I mantain a legacy system which utilises a sequential file for storing system
 table data. Some of the tables are extremely large and some exceed 65K in
 size. The application code has specific processing for tables greater than
 this size to split the detai
l of the table into more than one 'buffer' area (effectively treating the data
 as two table areas).
Is this a VMS system constraint on sequential file structures (i.e. the largest
 buffer possible is 65K)?

The Answer is :

  65KB is small, as far as OpenVMS file sizes are concerned.
  RMS does place constraints on the sizes of individual records
  within an RMS sequential file, and typically limits records to
  around 32KB.
  Files using block storage can have user-defined structures that
  are rather larger -- the upper limits on disk volume size and
  file sizes are discussed elsewhere here in Ask The Wizard and
  are referenced in the OpenVMS FAQ.
  Without details of the particular operation(s) involved or the
  particular limits (whether actual or perceived) in play here, no
  more specific answer is feasible.

answer written or last revised on ( 30-DEC-2003 )

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