What css will do if some of the votedisk failed?  and why

4 lymph Oracle 10 g RAC 2 with 5 disks, what happens if 5 votedisk $N get failed?

$N = 2, zero impact?
$N = 3?
$N = 4?

and what is the reason.

Thanks in advance.

Published by: shahand on December 1st, 2008 17:59

shahand, I suggest you to read carefully the day 2 rac guide as the Rac administration guide.

you're talking about these concepts are well discussed and exlpained in very simple terms (no need to buy other books before I read the official documentatio available for free)

But back to our business and your question:

The voting disk saves the node membership information.
A node must be able to access more than half the disks with right to vote at any time.
For example, if you have five voting disks configured, then a node must be able to access at least three drives with right to vote at any time.

If a node cannot access the required minimum number of discs with right to vote, it is expelled or removed from the cluster.

This avoids the split brain syndrome.

Tags: Database

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