This is RFE 6425091 "want 'zfs diff' to list files that have changed between
snapshots", which covers both file & directory changes, and file
removal/creation/renaming. We actually have a prototype of zfs diff.
Hopefully someday we will finish it up...
--matt
Henu wrote:
Hello
Is there a possibility to get a list of changed files between two
snapshots? Currently I do this manually, using basic file system
functions offered by OS. I scan every byte in every file manually and it
is of course awfully slow.
If I have understood correctly, ZFS could use its own information about
which files use which blocks, and thereby calculate the difference very
quickly without having to scan every byte. Currently I haven't found any
tools like this. My application uses libZFS to handle ZFS.
On the other hand, I have noticed that ZFS send generates difference
very quickly, even if it needs to find the small difference between many
unchanged files. From this, I have concluded that it may be using the
ZFS information to quickly see if file has been modified or not. Do you
have any idea how the send works? Maybe I could use its output to get
the list of changed files...
Henrik Heino
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