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Chapter 17.
Performing Network Backups
Backing up your data is an unglamorous
operation, but one that's critically important for the long-term reliability of
your systems. Some networks consist of one or two large servers and a larger
number of comparatively simple systems, such as X terminals, that contain
little or nothing in the way of important data. In such networks, you can place
backup hardware on the servers, back them up, and safely ignore the clients,
except possibly for keeping a default installation backup. If a client fails,
you can replace it with a new system bearing the standard configuration with
minimal fuss. Other networks, though, have several servers that require
backups, or client systems may house user data or other information that you
can't afford to lose. Such networks require backup solutions of one sort or
another. The options in this realm are quite varied, so this chapter can only
scratch the surface. It begins with a broad discussion of the options
available, then moves on to three specific solutions: Using tar to back up
Linux or UNIX systems, using Samba to back up Windows systems, and using AMANDA
to coordinate backups across a network.Network backups can be very complex,
particularly on a large network. For more information on this topic, you should
read whatever documentation comes with your backup tools. There are also books
on the topic, such as Preston 's
Unix Backup & Recovery (O'Reilly, 1999).
