Re: [IDEA] Poor man's UPS

From: Jan Engelhardt
Date: Mon May 22 2006 - 06:54:30 EST

>> You really want a system, which freezes for 10-20 seconds every 5 minutes,
>> and thaws again when the image is written?
> The snapshot could be taken in the background, by marking all pages read-only,
> starting a thread to write them to disk, and continuing normal processing.
> Such systems have been implemented in the past, see for example

Another one is VMware's background snapshot feature. Granted, it writes
"quite much" (IMO) to disk, but it's better than a foreground snapshot. :)

Jan Engelhardt
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