On Wed, 26 Mar 2025 21:25:01 +0000, Pew, Curtis G wrote: > ... >Things that can already exploit zFS would have no trouble exploiting this. >Also, programs that use QSAM or BSAM can in many cases run just fine using >Unix files instead of MVS datasets. IBM should make that even easier, and >provide more ways for other things to exploit Unix directories and files, >instead of depending on a 60 year old storage architecture that seems to >clearly have been a mistake from the start. > Moving the search to the control unit was an idea clever for its time but which gained little traction.
A co-worker once told me of a Sigma system which kept sourde files in a sort of KSDS, keyed by the statement number. Records could be added, deleted, or edited without rewriting the entire file. Another innovation dead end. A UNIX antiquarian told me that within his memory directory entries were 16 bytes: 14 for the filename and 16 bits for the I-number. Both have been outgrown, but with little pain because those numbers were parameters in header files or wrapped in system functions. I understand that a MACLIB member contains equates, 44 for DSN length and 8 for member length. If developers had been faithful to the paradigm, it would be possible to increase those numbers and assemble an installable OS with larger limits. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
