[Beowulf] ECC Scrub, which setting?

Greg Lindahl lindahl at pbm.com
Mon May 19 19:04:11 EDT 2008


On Mon, May 19, 2008 at 09:09:34AM -0700, David Mathog wrote:

> It is currently set to
> Basic, which scrubs every 5.24 ms.

You'll have to look in the manual to find out what that means -- it's
probably "do a small amount of scrubbing every 5.24 ms". And you have
to plug in your actual memory size to find out how often it scrubs all
of memory.

SuperMicro's AMD mobos now have a setting which dynamically sets the
scrub time according to your memory size. It's much more user
friendly.

> The machine only does
> research calculations, so a missed bad bit will it worst give a wrong
> result - no need to worry about melted reactor cores or anything like
> that.  An OS crash would be inconvenient but not a serious problem.

It must suck when you lose tenure for publishing a wrong paper.

-- greg


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