I'd like to put a VM into "fast forward" so that I can see several days (or weeks, or months) worth of logs and temp files build up and analyse them.
Is that possible with virtualbox & ubuntu 12.04 VM?
Apparently it can be done by playing with the jiffies in the kernel, by adding a speedup ratio. There is a document with a presentation about a quick 10 year test. It boils down to this:
Add a parameter to Kconfig (SPEEDUP_RATIO, ~1-1000), modify do_timer():
Finally, control ratio via procfs (
Also, according to
EDIT: If time leaps are acceptable, libfaketime may be a much simpler alternative. But I don't know how logging software will deal with that.