Solves what problem? Unix doesn't have records, so you have to impose your own record structure and tell seek the byte offset.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי ________________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Paul Gilmartin <0000042bfe9c879d-dmarc-requ...@listserv.ua.edu> Sent: Saturday, November 11, 2023 5:21 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Is True Skip-Sequential Processing Possible with RECFM=FB,DSORG=PS? On 11/11/23 06:59:07, David S. wrote: > To help resolve a question posted to a LinkedIn group I manage: > http://www.linkedin.com/feed/update/urn:li:groupPost:910927-7128598004344786944 > ... I'd like to find out if there's any way to achieve *true* > Skip-Sequential processing with a Fixed Block Sequential File with a fairly > short record length (i.e. DCB=(DSORG=PS,RECFM=FB,LRECL=80)? > For example: Begin sequential processing at record number 100, *without* > having to read the first 99 records. > > This feels like a job for DSFS. <https://www.ibm.com/docs/en/zos/3.1.0?topic=zos-data-set-file-system-dsfs> UNIX readily solves the problem with seek() and DSFS is supposed to mimic a UNIX file with the content of a Classic data set. Where's the User's Guide for DSFS? Is the skip count fixed, or is it dynamic, varying up or down with successive executions of your program? -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
