[Users] Changing files during migration

[Kirill Korotaev]

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.
> 
> 
> 
> _______________________________________________
> Users mailing list
> Users at openvz.org
> https://openvz.org/mailman/listinfo/users
>