thank you. this is exactly what I was looking for. This is for remote replication so it looks like I am out of luck. bummer.
Asa On Apr 14, 2008, at 4:09 PM, Jeff Bonwick wrote: > Not at present, but it's a good RFE. Unfortunately it won't be > quite as simple as just adding an ioctl to report the dnode checksum. > To see why, consider a file with one level of indirection: that is, > it consists of a dnode, a single indirect block, and several data > blocks. > The indirect block contains the checksums of all the data blocks -- > handy. > The dnode contains the checksum of the indirect block -- but that's > not > so handy, because the indirect block contains more than just > checksums; > it also contains pointers to blocks, which are specific to the > physical > layout of the data on your machine. If you did remote replication > using > zfs send | ssh elsewhere zfs recv, the dnode checksum on 'elsewhere' > would not be the same. > > Jeff > > On Tue, Apr 08, 2008 at 01:45:16PM -0700, asa wrote: >> Hello all. I am looking to be able to verify my zfs backups in the >> most minimal way, ie without having to md5 the whole volume. >> >> Is there a way to get a checksum for a snapshot and compare it to >> another zfs volume, containing all the same blocks and verify they >> contain the same information? Even when I destroy the snapshot on the >> source? >> >> kind of like: >> >> zfs create tank/myfs >> dd if=/dev/urandom bs=128k count=1000 of=/tank/myfs/TESTFILE >> zfs snapshot tank/[EMAIL PROTECTED] >> zfs send tank/[EMAIL PROTECTED] | zfs recv tank/myfs_BACKUP >> >> zfs destroy tank/[EMAIL PROTECTED] >> >> zfs snapshot tank/[EMAIL PROTECTED] >> >> >> someCheckSumVodooFunc(tank/myfs) >> someCheckSumVodooFunc(tank/myfs_BACKUP) >> >> is there some zdb hackery which results in a metadata checksum usable >> in this scenario? >> >> Thank you all! >> >> Asa >> zfs worshiper >> Berkeley, CA >> _______________________________________________ >> zfs-discuss mailing list >> zfs-discuss@opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
