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Triple Mirroring vs. Hot backups + Double mirroring

From: badri <badri_at_cc.gatech.edu>
Date: 1995/12/11
Message-ID: <4aioj5$3u6_at_gaia.cc.gatech.edu>#1/1 







Hi:



        We have a Sequent SE70 with ORACLE 7.2.2.3. We also have
an 8mm 6-tape stacker. Our database is 16Gb and we are currently
triple mirroring it. We currently detach a mirror after shutting
the instance down and back it up, followed by resynch of that
mirror.



I would like to invite comments/suggestions on the following:



        Instead of using up 16Gb per mirror and triple mirroring,
why not double mirror and use hot backups? What are the trade-offs?
On one side, it saves us 16Gb of disk space. I understand that
recovery is more tedious with hot backups. Any other problems?



Any and all help would be greatly appreciated,



thanks a lot,



-Badri
Received on Mon Dec 11 1995 - 00:00:00 CET












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