On 09 Oct 2003 10:31:25 +0200, you wrote: >Am Don, 2003-10-09 um 02.50 schrieb Donovan Baarda: > >> Using snapshots to do an incremental backup would be no different to >> doing any other type of backup using snapshots. It's the same as a >> normal incremental backup, just with the added guarantee that the >> filesystem is not changing underneath you as you do it.
I agree with that comment. Also somebody asked how to get it with Linux. Tip: use LVM + dump. - LVM will provide snapshot capability -> avoids files changing when backing up (as told by Donovan) - Dump is the tool used for taking backups (complete or incremental) >Say the first snapshot is created at 05:00 AM with 10TB data on the >filer and the second one one hour later at 06:00 AM the "incremental >snapshot" would backup only those blocks/files/whatever that have >changed since then (maybe just a few GB). This allows much faster >backups/restores with guaranteed consistency. At 5AM you should: - create a LVM snapshot (this is very fast, since LVM doesn't really need to copy data from the real fs to the "snapshot fs"). - dump fs completely - destroy LVM snapshot At 6AM you should: - create a new LVM snapshot - dump fs partially (incremental mode) - destroy LVM snapshot >Is anyone on >the list you uses this features and can tell what they really do or how >good they work? Well, I haven't tested enough and I really don't have big and loaded systems as the one you want to use, but all my tests have been very successful. Read the following thread that I started a few weeks ago: http://lists.debian.org/debian-isp/2003/debian-isp-200309/msg00330.html Saludos, --Roman -- PGP Fingerprint: 09BB EFCD 21ED 4E79 25FB 29E1 E47F 8A7D EAD5 6742 [Key ID: 0xEAD56742. Available at KeyServ] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]