Messages in this thread | | | Date | Tue, 23 Apr 2002 20:48:00 +0200 | From | Libor Vanek <> | Subject | Re: Adding snapshot capability to Linux |
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Alexander Viro wrote:
>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. >
My idea was to "catch" functions for writing to fs (file/metadata) and hold them till I copy file/metadata to snapshot. I thought that when done in the correct place this could work with virtualy any "normal" fs...
Libor
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