We started down this path in the late 90s. At the time we were concerned about the extra traffic required to mirror spool, so we didn't--and had to cold start JES2 each time. Aside from losing syslog, we had no way of telling where batch processing had left off. It might make a big difference if had to rerun a whole shift's worth of work vs. just jobs that had not completed.
After trying various clever methods of logging batch progress, we tried the obvious: mirror spool. We were amazed that we couldn't see a significant difference in mirroring overhead. Now we warm start JES2. Occasionally we get a few complaints at startup, but never anything serious. We have syslog intact at the DR site as well as actual job output still in the spool. Disclaimer: we made this change after we had converted from ESCON over OEM channel extender to FICON over DWDM. That thread has already been beaten up here. In any case it can't hurt to try mirroring spool. If it hurts you can stop; otherwise you're a hero! . . JO.Skip Robinson SCE Infrastructure Technology Services Electric Dragon Team Paddler SHARE MVS Program Co-Manager 626-302-7535 Office 323-715-0595 Mobile jo.skip.robin...@sce.com From: Bob Rutledge <deerh...@ix.netcom.com> To: IBM-MAIN@bama.ua.edu Date: 07/08/2011 04:52 PM Subject: Re: DS8XXX Syslog Mirroring Question Sent by: IBM Mainframe Discussion List <IBM-MAIN@bama.ua.edu> Ward, Mike S wrote: > We are mirroring our DISK and tape to a remote location for DR purposes. > About 3 weeks ago we did an exercise and brought the system up at the > remote location. It went great, except for one thing. Since we don't > mirror our page and spool we do a cold start on JES and we don't have a > copy of syslog. We are a z/os V1.11 shop. Has anyone done this type of > DR before? If yes what are doing about the syslog? We stand to lose a > days worth of syslog information. Any comments, etc... welcome. Thanks > in advance. Could you offload your DR syslog to a mirrored disk and receive it back into your "home" spool? Bob ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
