Re: [GENERAL] VM-Ware Backup of VM safe?

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От Klaus P. Pieper
Тема Re: [GENERAL] VM-Ware Backup of VM safe?
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Msg-id 00d601d3323d$a518dbe0$ef4a93a0$@gmail.com
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Ответ на Re: [GENERAL] VM-Ware Backup of VM safe?  (George Neuner <gneuner2@comcast.net>)
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> Von: pgsql-general-owner@postgresql.org [mailto:pgsql-general-
> owner@postgresql.org] Im Auftrag von George Neuner
>
> But VSS is needed only to copy VM files *while* they are in use.  If you snapshot
> the VM, the snapshot files then are read-only and can be freely copied.  As long
> as the backup avoids the currently active files, there is no danger.

But if you take a snapshot without VSS writer functions, I tend to believe that there is a serious potential that
relevantinformation is still only in RAM and not written to disk. This would get lost in the snapshot. 
I may be wrong, but my understanding of a VSS writer is that all transaction and log files are flushed to disk prior
tothe snapshot. 

Klaus


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