Today, I have run into an interesting discussion. The question was if
there is a need for multiplexing redologs by database (as suggested in
Admin manual) if this data are already mirrored (using RAID, disk
arrays mirrors, Data Guard, SRDF etc.).
I'm somehow paranoid, so I proposed tu use multiplexing, while other
party stated that these bytes are already stored on eight different
locations. That's sounds sensible, but I remember the issue a long
time ago in a company far far away, where one of two multiplexed
control files got corrupted and (of course) copies on both mirrored
disc vere identical (means corrupted), second redo log on different
volume group was OK. So in this case we would been doomed if these
redologs weren't multiplexed.
What's the opinion on this topic in the newsgroups? Preferably with
some technical explanation.
--
Dusan Bolek
Email: spambin_at_seznam.cz
Pls add "Not Guilty" to the subject, otherwise your email is going to
be burnt as a SPAM.
Received on Fri Mar 12 2004 - 10:15:57 CST
