I remember raining on someone's parade when they proudly told everyone that they had 95% availability with a windows environment. My comment "wow as low as that" did not go down well.
15 years ago we had a CICS customer present to us. He said their CICS had been up for about 3 years with no down time. Cue round of applause. The speaker said that's not the impressive bit. During these 3 years we have moved machine rooms twice, upgraded CICS, Z/OS, DB2 etc to new versions and had a processor upgrade and still the CICS was available to the end users 100% of the time. A long time ago, another CICS customer presented to us and they said "it takes us 30 minutes to bring CICS up ready for production". One of the Linux/Windows guys in the room suggested they get a faster box. There was a stunned silence in the room for a few moments, till the speaker said. "How long does it take you to open 4000 VSAM dataset, 10,000 DB2 tables, connect to 5,000 CICS regions and check everything is working ? CICS comes up in under 30 seconds". Here endeth the lesson to the choir. On Tue, 11 Jun 2024 at 13:08, Allan Staller < [email protected]> wrote: > Classification: Confidential > > I agree LOL, 99.9% is so 20th century! > > Measured from where? Internal Servers? > > Does this include the user perception? > Outages are perceived from the end-user viewpoint, not the source. > Components beyond AWS control can affect user perception. > > BTW, z/OS has been advertising 99.9999% availability in a sysplex for at > least a couple of decades. > > I did like the automated problem detection/rollback though. > > > > > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On Behalf > Of Charles Mills > Sent: Monday, June 10, 2024 6:22 PM > To: [email protected] > Subject: LOL - AWS brags about 99.9% uptime! > > [CAUTION: This Email is from outside the Organization. Unless you trust > the sender, Don't click links or open attachments as it may be a Phishing > email, which can steal your Information and compromise your Computer.] > > https://graphite.dev/blog/how-amazon-deploys-code > > Aiming for only (!) four minutes of downtime a month! > > Charles > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send email > to [email protected] with the message: INFO IBM-MAIN > ::DISCLAIMER:: > ________________________________ > The contents of this e-mail and any attachment(s) are confidential and > intended for the named recipient(s) only. E-mail transmission is not > guaranteed to be secure or error-free as information could be intercepted, > corrupted, lost, destroyed, arrive late or incomplete, or may contain > viruses in transmission. The e mail and its contents (with or without > referred errors) shall therefore not attach any liability on the originator > or HCL or its affiliates. Views or opinions, if any, presented in this > email are solely those of the author and may not necessarily reflect the > views or opinions of HCL or its affiliates. Any form of reproduction, > dissemination, copying, disclosure, modification, distribution and / or > publication of this message without the prior written consent of authorized > representative of HCL is strictly prohibited. If you have received this > email in error please delete it and notify the sender immediately. Before > opening any email and/or attachments, please check them for viruses and > other defects. > ________________________________ > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
