December 30, 2015 at 6:38 am
Hi All,
Suppose there are Two Windows Server each with 4 cores. One server will be Active and Another Passive. During implementation of Active/Passive SQL Server 2008 or 2012 (Enterprise/Standard) clustering between these two server whether SQL Server license of only 4 core should be used or 8 core is required.
Regards,
Nikhil P Desai
January 6, 2016 at 8:33 pm
4 cores as clustering in SQL can only run active on one server. it can make no use of the 4 cores in the other node until it is failed over to it. At which point it can make no use of the 4 cores in the first node.
January 7, 2016 at 1:05 pm
If you have instances used on only one node, then you can get 4 core licenses. The other 4 on the passive, unused node, do not have to be licensed.
However if you use those cores in SQL Server for anything other than waiting for failover on the cluster, they must be licensed. This should include, IIRC, any DBCC, maintenance, tests, etc.
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