Messages in this thread | | | Subject | Re: Adding snapshot capability to Linux | From | Xavier Bestel <> | Date | 23 Apr 2002 16:58:50 +0200 |
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le mar 23-04-2002 à 16:45, Alexander Viro a écrit : > You _can't_ get consistent snapshots without cooperation from fs. LVM, > EVMS, whatever. Only filesystem knows what IO needs to be pushed to > make what we have on device consistent and what IO needs to be held > back. Neither VFS nor device driver do not and can not have such > knowledge - it depends both on fs layout and on implementation details.
I always thought that with a journalled fs, data was always consistent on disk - i.e. always in a state where remounting the image (and replaying the journal) makes it consistent.
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