Ted, It helps if you read the email. I did not mention performance as a reason to spread catalogs across volumes, or to cease doing the same. On the contrary a warned that performance is something to consider if you do consolidate your catalogs onto one volume.
I like it when you quote me correctly and argue my points. I don't like it when you write fiction. Your "I'm not talking about just the catalogue" is unnecessary because spreading catalogs across many volumes does nothing to prevent this. If UCAT.APPL.ONE has a logical error, UCAT.APPL.TWO will not be affected whether it is on the same volume or not. As to the failure of VTOC and VVDS, I agree they are possibilities and you make a good point. I addressed this to some degree with the suggestion of scheduled backups of the catalog volume or the catalogs themselves using Shadowimage or FlashCopy. Recovery would still require some clean-up of the VVR and/or SMF roll forward. I guess the outage would be similar to losing the VTOC and VVDS of the volume with the MCAT. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of > Ted MacNEIL > Sent: Tuesday, May 04, 2010 2:06 PM > To: IBM-MAIN@bama.ua.edu > Subject: Re: [IBM-MAIN] Catalog re-location > > >Personally I think your single volume with many catalogs idea has merit. > > I don't. > All the hardware in the world is NOT going to protect you from a logical (data > failure). > And, I'm not talking about just the catalogue. > There's the VTOC, the VTOCIX, the VVDS, etc. > > Performance is not the only criteria. > > - > Too busy driving to stop for gas! > > ---------------------------------------------------------------------- > 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
