Dell Acceleration Appliances for Databases Instrukcja Użytkownika Pobierz pdf (Strona 78)

It is very important to note that this count of files (6 OCR and 5 Voting) means one of the LUNs will

not have a Voting File. It is critical that no single ION Accelerator node have a majority of the Voting

Disk files, because if a majority of them go offline, Oracle aborts the entire cluster.

For example, in a two-node configuration there would be three voting files on the first node and two

on the second node. Taking the second node offline for maintenance is not a problem, because the

majority of Voting Files are still online. However, taking the first node offline causes the entire cluster

to abort. The solution calls for a third storage node, which can be a third ION Accelerator node or a

legacy SAN. With three storage nodes, two voting files are placed on the first, two on the second,

and one on the third. Now, no single node contains a majority of voting files, so the cluster is not

aborted.

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Dell Acceleration Appliances for Databases Instrukcja Użytkownika Strona 78