When you purchase an Exadata you get a base spare parts pool per rack (1 CELL
disk drive and 1 Flash Card).
Yes if you believe that you need a larger spare parts to include other
components then you have to purchase the spare parts.
As to redundant, at the fundamental part level all parts are not redundant
within a specific server/switch, but at the Structural component level Compute
Node/CELL Nodes you are redundant. At the Compute node that redundancy is only
in play if you are using RAC instances on the Exadata.
I would never agree with this statement: “make sure we will not have any
downtime in the production environment”
I have seen
A. Some setups that have single instances without failover setup under
GRID so if you lose a compute node your instance is down.
B. Regular data center work on the Power distribution system where half
the power is taken off line which for one part of the data center caused a
power surge to the secondary power distribution and took out multiple racks.
C. No matter how many spare parts you have it will not keep you from
having a multipart failure like losing 2 disk drives at the same time under
Normal redundancy causing ASM disk group loss.
D. The standard bugs we all hit that actually cause the clusterware to
bounce multiple or all compute nodes.
It really comes down to simply the statistics of risk calculation, but there is
no guarantees of “never having downtime” no matter how many levels of
redundancy you have.
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> On Behalf
Of Kamran Agayev (IT/DBA)
Sent: Thursday, November 28, 2019 6:42 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Exadata Machine spare part administration
Hello everybody
This year we were informed that Oracle doesn’t allow partners to have a stock
for Exadata spare parts. It means that you have either order a spare part once
it’s failed (which takes time for the shipping etc.) , or buy and keep it in
your stock. They just don’t provide extra spare parts (for free, to keep it in
partner’s stock)
As almost everything in Exadata is redundant, it means we can order the failed
hardware and just wait for it for few days and then use it once it’s arrived.
We have hosted some critical production databases in Exadata machine (X7-2) and
we also have a fully functional standby Exadata. However, to maintain 24x7
availability of databases, we have an option to buy some spare parts in advance
and keep them in the stock and make sure we will not have any downtime in the
production environment
So I have 2 questions:
* Can we confirm that the Exadata machine is redundant by itself and we
don’t need to buy spare parts in advance? (with and without considering the
standby Exadata, as it’s going to take some time to perform switchover of all
databases)
* Did you have any bad experience regarding Exadata hardware failure
which caused downtime of whole Exadata machine so far?
Thanks beforehand
BR,
Kamran Aghayev A.
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