z/OS storage
How to read a zPulse daily mail: DASD, CPU, space and tape
A zPulse daily mail comes from a scheduled study, with charts in the body and the period in the subject. Learn to read the DASD, CPU, DCOLLECT and tape mails.
Blog · Author
Founder of Technical Storage
Founder, Technical Storage · z/OS storage performance
Background
Founder of Technical Storage, the z/OS storage performance company behind zPulse. Measuring mainframe Disk, Tape and CPU workloads since 1997.
Technical Storage has measured real z/OS workloads since 1997, first with EADM, EATM and EAMC, now with zPulse. The analyses on this blog come from that work: reading RMF, CMF and SMF data on production systems, and explaining what the numbers mean to the people who run them.
Experience and affiliations
- Technical Storage has worked on z/OS storage performance since 1997
- Technical Storage is an IBM Partner
- Technical Storage is a member of GSE (Guide Share Europe)
Areas of expertise
- z/OS storage performance
- RMF and CMF reporting
- SMF records
- DASD response time
- Tape and virtual tape (TS7700)
- DFSMS and DCOLLECT
- Capacity planning
Blog
Articles
zPulse · Disk
How to read RMF 74.1 DASD response time: CONN, DISC, PEND, IOSQ
RMF 74.1 DASD response time is IOSQ, pending, disconnect and connect time added up. Learn what each part means and in which order to read them on z/OS.
zPulse · Disk
Replacing EADM: what stays the same and what changes with zPulse Disk
Replacing EADM with zPulse keeps the RMF and CMF disk analysis you know. Learn what stays, what is new, what to prepare and how the move to zPulse works.
zPulse · Tape
Tape mount analysis on z/OS: what SMF 21 tells you
SMF 21 records each tape demount with its volume, drive and error counts. See what it brings to tape mount analysis on z/OS, and what you need beside it.
z/OS storage
z/OS storage performance glossary: the key terms of RMF, CMF, DCOLLECT and tape
A z/OS storage performance glossary: the measurement, disk, CPU, tape and space terms of RMF, CMF and DCOLLECT data, each defined in one plain sentence.