On 15.06.2011 14:30, Simon Walter wrote:
Another one is that snapshots are per-filesystem, while the intention
here is to capture a document in one user session. Taking a snapshot
will of course say nothing about the state of other user sessions. Any
document in the process of being saved by another user, for example,
will be corrupt.
Would it be? I think that's pretty lame for ZFS to corrupt data.
I think "corrupt" is not the right word to use here - "inconsistent" is
probably better. ZFS has no idea when a document is "OK", so if your
snapshot happens between two writes (even from a single user), it will
be consistent from the POV of the FS, but may not be from the POV of the
application.
HTH
Michael
--
Michael Schuster
http://recursiveramblings.wordpress.com/
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