4096? That sounds like it is tuned to the underlying CI structure of zFS. Would you consider performance parameters on DCBE to be cheating?
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of David Crayford [dcrayf...@gmail.com] Sent: Tuesday, June 6, 2023 6:26 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: z/OS 3.1: Now UNIXR Certified On 5/6/2023 6:07 pm, Seymour J Metz wrote: > OTOH, benchmarks are tricky things, and it is often easy to get the answers > you want by carefully cherrypicking the details. I suspect that QSAM really > is faster for the test he ran. QSAM may have stood a chance against HFS but it has no chance against zFS. It's a very standard benchmark which simply reads/writes 4096 length records. The code is in the public domain so I challenge anybody to try to tweak the code so that QSAM performs better. If you can, then leave a comment in the gist and DM me your details. I will send you a bottle of fine claret, maybe a burgundy if that tickles your fancy. I'm that confident it won't happen :) ---------------------------------------------------------------------- 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
