Re: Database and RAID

David Kosenko wrote: > > "Art S. Kagel" <kagel@bloomberg.net> offerred: > +David Kosenko wrote: > +> Version 7.3 of IDS allows the use of external backup mechanisms. > + > +This was intended for use as a VERY fast method. Namely in combination > +with 7.30's support for multiple mirrors. > > Hmm, haven't heard of this (multiple mirrors) before. If it is there, it is an > undocumented feature. No mention of it in the 7.3 Admin Guide. Sure you're not > thinking of ER? > > Anyway, the poop I got was that external backups were added at the request of EMC, > who were using their hardware mirroring to support fast backups, as you & other have > described. Set the mode to BLOCK, turn on your h/w mirror, when it is sync'ed turn > it back off and UNBLOCK your system. Pretty expensive backup, if you ask me, but if > downtime costs you big $$, the worth it in the long run. You may be right about who has to manage those multiple mirrors, I'll check into it. As far as the expense...There is no other choice when you have a 400GB database server that takes 36 hours to archive! Art S. Kagel