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Full Discussion: Back up implementation
Top Forums Shell Programming and Scripting Back up implementation Post 302700515 by Corona688 on Thursday 13th of September 2012 01:43:18 PM
Old 09-13-2012
Not a command, no. What guarantee would you have that you caught it at the right instant? You need something more fundamental.

Linux can do so at the filesystem level with NILFS, a snapshotting filesystem which keeps past versions of files in case you need them. Each snapshot is independently accessible.

It'd be a big space waster for files that change often of course! A huge file that completely changes all the time would take a lot of space to snapshot.

Last edited by Corona688; 09-13-2012 at 02:49 PM..
 

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YUM-FS-SNAPSHOT.CONF(5) 					   File Formats 					   YUM-FS-SNAPSHOT.CONF(5)

NAME
yum-fs-snapshot.conf(5) SYNOPSIS
yum-fs-snapshot.conf(5) is the configuration file for yum-fs-snapshot(1) Yum plugin for snapshotting your filesystems before running a yum transaction. By default, this plugin will snapshot all filesystems that it is capable of snapshotting. This includes block-level snap- shots using LVM snapshots. FILES
/etc/yum/pluginconf.d/fs-snapshot.conf FILE FORMAT
yum-fs-snapshot.conf(5) utilizes configuration options in the form of OPTION=VALUE OPTION
exclude This is a space delimited list of the mount points you do not wish to have snapshotted by this plugin. OPTION
create_snapshots_in_post This is a boolean value used to control whether snapshots are also created after running the yum transaction. OPTION - [lvm] section enabled This is a boolean value used to control whether LVM snapshots will be created for filesystems built on LVM logical volumes. OPTION - [lvm] section lvcreate_size_args This is the space delimited lvcreate argument list that is used to specify the size of the snapshot LV. Valid lvcreate size options are -l or -L. If not specified then LVM snapshots will not be created for volumes that are not thinly provisioned. AUTHOR
Josef Bacik <josef@toxicpanda.com> Mike Snitzer <msnitzer@fedoraproject.org> SEE ALSO
yum-fs-snapshot(1) 3 February 2010 YUM-FS-SNAPSHOT.CONF(5)
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