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Re: Changing files during migration [message #13671 is a reply to message #13669]

Fri, 01 June 2007 13:05

dev
Messages: 1693
Registered: September 2005
Location: Moscow

Senior Member

Jun OKAJIMA wrote:
>
>
> Hello.
>
> If I change/modifi/delete opened files during migration,
> what happens?
>
> For example....
>
> 1. I run a mail daemon ( like qmail or sendmail) in a VE.
> 2. Freeze the VE and create a suspend image.
> In this moment, the daemon opens /var/spool/mail/* files.

how can daemon open the file if it is frozen (and the whole VE as well)?

> 3. Delete(or modify) /var/spool/mail/* stuff.
> Opened files are deleted(modified) during migration!!!.
> 4. Restore the suspend image.
>
> What happens?
> It resumes or not?
> Maybe whole OS (host OS) hangs?
> Just the daemon gets "File read error" or something after resumed?
> Or you can not resume the suspend image anymore?
>
> This is an interesting trial, but a bit fear to do it on the real server...
>
> --- Okajima, Jun. Tokyo, Japan.
>
>
>

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[Message index]

		Changing files during migration By: Jun OKAJIMA on Fri, 01 June 2007 12:47
		Re: Changing files during migration By: dev on Fri, 01 June 2007 13:05
		Re: Changing files during migration By: Jun OKAJIMA on Fri, 01 June 2007 13:23
		Re: Changing files during migration By: dev on Fri, 01 June 2007 13:32

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