hello ! i think of using zfs for backup purpose of large binary data files (i.e. vmware vm`s, oracle database) and want to rsync them in regular interval from other systems to one central zfs system with compression on.
i`d like to have historical versions and thus want to make a snapshot before each backup - i.e. rsync. now i wonder: if i have one large datafile on zfs, make a snapshot from that zfs fs holding it and then overwrting that file by a newer version with slight differences inside - what about the real disk consumption on the zfs side ? do i need to handle this a special way to make it space-efficient ? do i need to use rsync --inplace ? typically , rsync writes a complete new (temporary) file based on the existing one and on what has change at the remote site - and then replacing the old one by the new one via delete/rename. i assume this will eat up my backup space very quickly, even when using snapshots and even if only small parts of the large file are changing. comments? regards roland This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
