Exadata writeback Flash Cache usable space
From: Ls Cheng <exriscer_at_gmail.com>
Date: Sat, 17 Jul 2021 10:21:26 +0200
Message-ID: <CAJ2-Qb9X+1Ls6qGrF3K9nDrXkG1g5xCrRGaXszH=afpc34OgtQ_at_mail.gmail.com>
Hi
Date: Sat, 17 Jul 2021 10:21:26 +0200
Message-ID: <CAJ2-Qb9X+1Ls6qGrF3K9nDrXkG1g5xCrRGaXszH=afpc34OgtQ_at_mail.gmail.com>
Hi
We are deploying a new Exadata x9m quarter rack with HC disks next week and
the flashcache will be configured using writeback instead of writethrough.
In writeback mode the flash is mirrored whereas in writethrough if I
understood correctly there is no mirroring. So I have a doubt, the quarter
rack has 76.8 TB raw flash space, what is the usable space with writeback
enabled? Since we are using High Redundancy I expect 25.6TB usable flash
cache space, correct?
Thanks
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Received on Sat Jul 17 2021 - 10:21:26 CEST