[plug] Is there a way to put a job to sleep so it can survive a reboot?

[Craig Ringer]

> What about "suspend-to-persistent-solid-state" (like a memory stick or 
> something) instead.  This would be a lot quicker than HDD operations, 
> possibly it could even be run regularly (e.g. in crontab) in case of 
> power failure.

AFAIK most NVRAM is much slower than hard disks. Access times /may/ be 
lower due avoiding the need to seek, but your sustained writes /may/ be 
very poor. It depends on the memory type of course. They also often have 
limits on the number of writes they can survive.

> Even better, why not just forget RAM altogether and use persistent solid 
> state instead, then we could almost forget about "shutdown" altogether 
> and just turn the power off at the box (except that it might interrupt 
> HDD operations...)

http://google.com/search?q=MRAM

Alternately, what you're describing is functionally very similar to 
using battery-backed RAM and suspend-to-RAM. This has been standard on 
laptops for 8+ years - it's called APM Suspend - and is quite possible 
on many desktops. Of course, desktops need to stay plugged in as they 
don't have a battery.

Craig Ringer


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