JJZolx wrote: > bklaas;189372 Wrote: > >> The disk space required is just a little more than the space of one full >> backup, plus incrementals." >> > > Doesn't sound like what I understand to be a snapshot. Usually only > pointers are stored at the time of the snapshot, then writes to the > filesystem are actively monitored and only the changes stored. > > For most people, any backup strategy for music or video that takes up > more space than the original probably isn't feasible. If you have the > storage space, it would certainly be _nice_, since it offers better > protection than doing a sync/mirror. Imagine running a script on your > library to add a COMPILATION tag. Unless you start all over, the > incremental will be as big as the full backup and the entire thing will > require 2x the storage of the library itself. >
Yes, that's the disadvantage. You have to be careful with operations like that or reorganizations of your directory structure. In my case stuff is backed up to a colo server, but my upload bandwidth isn't unlimited (1 Mbit) so I have to remind myself of the physical limits. Of course, the bandwidth limitation would be the same in case of a mirror setup, so in fact because I use a colo server, the snapshot solution has no real disadvantages to a mirror. Extra disk usage is minimal and the bandwidth limitation makes sure I don't change too much at once. I'm not much of a tag control freak, thankfully. I keep 8 daily and 8 weekly snapshots (I can go back 8 weeks). The latest snapshot was 126G and disk space used by all snapshots is 131G, so in practice it's working pretty well for me. > With a simple mirror you only need as much space as the original. You > could buy two 400 GB drives and when the first is nearly full you won't > be running out of space on the other used for backup. Yes, you have to > be very careful to not mirror a corrupted library, or one where files > have been deleted. > For me backups have to be automatic, and I'd be in grave danger with such a solution. Keep in mind that I don't backup just the music, but important documents, digital pictures and home movies as well. Regards, Peter _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
