Hi all, I've been using tarsnap for some months to do all kinds of backups. Now, I'd like to use tarsnap to archive ZFS filesystem snapshots. What is unclear to me is whether and how I should be using the --snaptime option.
From the manual: --snaptime file (c mode only) This option MUST be specified when creating a backup from a filesystem snapshot, and file must have a modification time prior to when the filesystem snapshot was created. (This is nec‐ essary to prevent races between file modification and snapshot creation which could result in tarsnap failing to recognize that a file has been modi‐ fied.) Should I just specify any file that hasn't been modified during the snapshot? And would someone be willing to explain why this is at all necessary? Thanks, Albert