Why aren’t SAN snapshots a good backup solution for SQL Server?

First rule of backups: Backup can’t depend on the production data. SAN snapshots, and I don’t care who your vendor is, by definition depend on the production LUN. We’ll that’s the production data. That’s it. That’s all I’ve got. If that production LUN fails for some reason, or becomes corrupt (which sort of happens a…

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How many NUMA nodes should I have if I have lots of RAM and just a few cores?

There are some systems out there which have a lot of RAM, but only a few processors and these machines may need a non-standard NUMA configuration in order to be properly setup. For this example, let’s assume that we have a physical server with 512 Gigs of RAM and two physical NUMA nodes (and two…

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