Post by Niall LitchfieldPost by DA MorganPost by Jens RosenthalHi there,
right at the moment we're comparing different database servers for our
new software version. For this evaluation it seems important to find an
approximation for the expected downtime of the system.
I just couldn't find any information about MTBF/MTTR of an Oracle 10g in
the internet. Does anyone know a reliable source of information?
Thanks in advance.
Greetings from Munich, Germany
Jens Rosenthal
Depends on the DBA and on whether management is willing to support the
DBA in locking down the production environment.
It is not uncommon to see Oracle on Linux/UNIX up 7x24, essentially
forever, with a good combination of RAC and DataGuard.
7 hours a day 24 days a month...
Seriously you tend to get what you pay for, Dan has described a system with
at least 3 physical servers (probably at least 4 servers) in at least 2
locations with reliable redundant comms between them. This will be very,very
reliable (assuming one knows how to manage it). It will also cost - both in
cash and management terms. Meanwhile you need to think a little about what
you are specifying, and whether any numbers that came off the internet would
be relevant.
You are correct about it costing more ... but more than what? To give an
example I recently built a system like this with 2 two node clusters
using 4 proc Dell 6650s. Paid more for the RAC licenses than for the
hardware (not counting storage arrays). But far less for all of it
including the RAC licenses, than for one 8CPU box from Sun.
--
Daniel A. Morgan
University of Washington
***@x.washington.edu
(replace 'x' with 'u' to respond)
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