Date: Wed, 20 Oct 2010 08:32:33 -0400 From: "Dan Langille" <dan@langille.org> To: freebsd-stable@freebsd.org Subject: 'zfs send -i': destination has been modified Message-ID: <c00184baaf75b1e64e625a0b9dfb97b4.squirrel@nyi.unixathome.org>
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I am trying to do a 'zfs send -i' and failing. This is my simple proof of concept test: Create the data # zfs create storage/a # touch /storage/a/1 # touch /storage/a/2 # touch /storage/a/3 Snapshot # zfs snapshot storage/a@2010.10.19 send # zfs send storage/a@2010.10.19 | zfs receive -v storage/compressed/a receiving full stream of storage/a@2010.10.19 into storage/compressed/a@2010.10.19 received 252KB stream in 2 seconds (126KB/sec) # Create one more file and snapshot that # touch /storage/a/4 # zfs snapshot storage/a@2010.10.20 send it # zfs send -i storage/a@2010.10.19 storage/a@2010.10.20 | zfs receive -v storage/compressed/a receiving incremental stream of storage/a@2010.10.20 into storage/compressed/a@2010.10.20 received 250KB stream in 3 seconds (83.4KB/sec) What do we have? # find /storage/compressed/a /storage/compressed/a /storage/compressed/a/1 /storage/compressed/a/2 /storage/compressed/a/3 /storage/compressed/a/4 Of note: * FreeBSD 8.1-STABLE * ZFS filesystem version 4. * ZFS pool version 15. * zfs send is on compression off * zfs receive has compression on What I actually want to do and what fails: # zfs snapshot storage/bacula@2010.10.19 # zfs send storage/bacula@2010.10.19 | zfs receive -v storage/compressed/bacula receiving full stream of storage/bacula@2010.10.19 into storage/compressed/bacula@2010.10.19 received 4.38TB stream in 42490 seconds (108MB/sec) # zfs snapshot storage/bacula@2010.10.20 # zfs send -i storage/bacula@2010.10.19 storage/bacula@2010.10.20 | zfs receive -v storage/compressed/bacula receiving incremental stream of storage/bacula@2010.10.20 into storage/compressed/bacula@2010.10.20 cannot receive incremental stream: destination storage/compressed/bacula has been modified since most recent snapshot warning: cannot send 'storage/bacula@2010.10.20': Broken pipe I have no idea why this fails. Clues please? To my knowledge, the destination has not been written to. -- Dan Langille -- http://langille.org/
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