| Date: Fri, 25 Feb 2005 20:05:12 +0000
| From: deccy at csn.ul.ie (Declan Houlihan)
| I'm wondering if there's any way to save a process to a file in Linux?
| Is there any application out there that I could supply with a PID
| and it would stop that process from executing, take all the info
| for that running process, memory, register values etc, save it
| all out to a file so that at a later time / date I could just resume
| that process?
very unlikely (for the general case).
a “process” is more than memory+registers,
but also things like file descriptors which
cannot be restored (in the general case).
facilities like mutable shared memory would
also be a problem (in the general case).
specific programs sometimes can sometimes
checkpoint themselves, either so they can
be restarted if the world blows up during
a long computation; or so that some bit
of expensive (time-consuming) processing
need only be done once (e.g., an interpretor
parsing a script). but that is all very
specific to those programs.
this subject has been discussed to death
over the years; I remember talking about
it in University in the context of 7th
Edition Unix in the early 1980s! I am
sure a Google™ search will find lots of
hints, but noting much in terms of a
general, or even “acceptable”, solution.
Experienced (20+ yrs) kernel/software Eng: | Brian Foster Montpellier,
• Unix, embedded, &tc; • Linux; • doc; | blf at utvinternet.ie FRANCE
• IDL, automated testing, process, &tc. | Stop E$$o (ExxonMobile)!
Résumé (CV) http://www.blf.utvinternet.ie | http://www.stopesso.com
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