Snapshot backup Post: 302717171

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Operating Systems OS X (Apple) Snapshot backup Post 302717171 by DGPickett on Wednesday 17th of October 2012 03:49:08 PM

10-17-2012

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I have a continuous Mozy Internet backup so intermediate changes are not vulnerable long, and a usb 1TB hard drive I plug in to each box in rotation to catch it up. The Mozy took 3 days to restore my saved files last time, alone. So, I have no gap.

Now, to do offsite with external hard drive, get extras so the one on site to be written is not the most recent prior copy, like backup tapes. The Internet product is still wise, as it makes the window of vulnerability very short. If you use network not sneakers to move the backup data offsite, you can merge the two. Have a local copy very quickly updated and great for restores, and a remote copy that may lag more, is slow for restores but ensures the data is still online if that center goes down. Disk is cheap, data is priceless. Mirrored data centers can ensure that data is and processing are both in multiple distinct places. A compressed stream of updates both ways can keep them pretty close in sync without slowing either host.

Good old MULTICS had no hard links, and any change rippled up the tree into directory status all the way to the root, so you could find just the modified files with zero effort. Modern file systems and volume managers can support backup systems with similar lists. After the fact new file discovery is slow and loads the system more.

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rdiff-backup-fs

RDIFF-BACKUP-FS(1)					      General Commands Manual						RDIFF-BACKUP-FS(1)

NAME

       rdiff-backup-fs - Filesystem for accessing rdiff-backup archives.

SYNOPSIS

       rdiff-backup-fs <mount_point> <repository> [repositories ...] [-option ...]

DESCRIPTION

       rdiff-backup-fs is a filesystem in userspace that reads rdiff-backup archives and provides convenient access.

OPTIONS

       --debug <0-4>
	      Run rdiff-backup-fs in foreground with given verbosity of debug messages.

       -f, --full
	      Store information about all revisions in memory. CAUTION: this may take a lot of memory if your archive contains many revisions.

       -l, --last
	      Displays	files from the most recent increment as directories, each holding every version of the file. CAUTION: this stores informa-
	      tion about all revisions in memory and therefore may take a lot of memory if archive contains many revisions.

       -c <n>, --caching <n>
	      How many files retrieved from the rdiff-backup archive may be cached by filesystem. By default rdiff-backup-fs will cache up  to	10
	      files. If this switch is set to 0, no caching will be done.

       -r <n>, --revisions <n>
	      How many revisions should be stored in memory for on demand revision retrieval. By default rdiff-backup-fs will store up to 10 revi-
	      sions in memory.

       -d, --directory <path>
	      Set directory for directory with temporary files. By default rdiff-backup-fs uses /tmp.

       -v, --version
	      Print version of rdiff-backup-fs and exit.

SEE ALSO

       rdiff-backup(1)

COPYRIGHT

       rdiff-backup-fs is Copyright (c) 2007-2011 Filip Gruszczyski.

       rdiff-backup-fs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License  as  published
       by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

       This  program  is  distributed  in  the	hope  that  it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MER-
       CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.

AUTHORS

       Filip Gruszczyski <gruszczy@gmail.com>

																RDIFF-BACKUP-FS(1)