Larre: Are you currently running 2.2 on all your production machines?
Ed > On Apr 24, 2017, at 4:57 AM, Larre Shiller > <[email protected]> wrote: > > I have been involved in a number of offline discussions as well as multiple > IBM PMRs and problem records with our DASD hardware vendor concerning EOS and > although this is potentially a most useful function, the overhead involved is > not zero--there will always be *some* amount of overhead involved in > re-writing every bit of a data set, no matter how much improvement IBM has > made to the function at the OS level (such as the 95+% reduction in EXCP's > since the initial implementation of EOS). During our testing, we find that > it takes an additional 1 hour of processing time for every 500G of data in > order to use EOS. If you have a tight batch window or any kind of > time-sensitive processing, you should make sure that you can afford to use > EOS before simply activating it for every data set in your enterprise. Since > this is a security-related function, I will not comment publicly > if/when/where we do or do not use it, but I will simply recommend that you > perform a benchmark evaluation of the overhead involved on your hardware > before activating EOS. > > Larre Shiller > US Social Security Administration > > "The opinions expressed in this message are mine personally and do not > necessarily reflect the opinion of the US Social Security Administration > and/or the US Government." > > ---------------------------------------------------------------------- > 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
