BDsync: Block Device sync

[Rolf Fokkens]

Thanks for your feedback, I'm aware of the potential dataloss. So far however in my experience (Linux, ext4) systems recover very well from unforseen shutdowns, especially if the application software (like Oracle databases) also addresses this.

I could have the VM's use data=journal to further improve consistency, but that's not needed in my situation.

Rolf



Op 29 jun. 2012 om 11:03 heeft Henri Shustak <henri.shustak at gmail.com> het volgende geschreven:

>> I'm sure I'm replicating a moment in time like someone pulled the power plug. I assume that the VM's can recover from that.
> 
> Maybe... 
> 
> It will depend what you are backing up. Some things may be fine with having the power plug pulled out, while others may not. I would not count on it just because when you tried a recovery once and it seemed to work okay.
> 
> Two approaches you may want to consider : 
> (1) You could try suspending the VM.
> (2) Better yet, you could shut it down. 
> 
> I appreciate that depending upon your situation these approaches may not be a possibility. However, they are worth considering.
> 
> From my understanding it will really depend upon what you are backing up and if the approach you mentioned will work to protect that data. What you have mentioned may be fine. 
> 
> In summary, pulling a power plug out of a computer system is not typically recommended (normally fine if it has redundant power supplies). Think about how important that data is. Would you be happy pulling the power out of a system and then trusting that everything on the system was fine.
> 
> Things happen power leads get disconnected, systems freeze. However, people try to be carful and developers try to stop systems from freezing.
> 
> I hope this helps.
> 
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