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Full Discussion: Backup Tape suggestion
Top Forums UNIX for Dummies Questions & Answers Backup Tape suggestion Post 302194838 by Smiling Dragon on Tuesday 13th of May 2008 07:58:24 PM
Old 05-13-2008
Java

There's two main types of backups:
Bare Metal Recovery backup: You backup the entire system so that you can recover everything back in one hit if you totally fry the system.

Application / Data Recovery backup: You backup only the customised config and data for your app (optionally backing up the application binaries too). If you have to recover from a totally stuffed system, you rebuild the base OS, the apply your backup over the top to put the custom stuff back.

Bare metal recoveries are generally difficult to do and notoriously unreliable as they are hard to test properly. (But I am a bit biased there, so a 2nd opinion might be in order).

Based on my above (biased) opinion, I'd recommend you look at backing up the data only - ie the contents fo the website and webserver config files (including any authentication databases it uses). In the event of a problem, reinstall your OS, reinstall the webserver, restore your backup.

If your webserver isn't installed via a linux package (eg .rpm or .deb etc), you could consider backup up the webserver application directory too - it'll save a step in your recovery in the event of a failure at the expense of longer backup times and more space used.

The final decision should really come down to the following questions:
How fast do you need to recover?
How much storage can you afford?
How are you planning on testing your backups periodically?

Then choose a model that best meets your needs.

As an aside to think about, consider backing up over the network to another server instead, it'll save tapes and time. The drawback is that a total site failure could destroy your backups as well as the original.
 

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BACKUP_ADDHOST(8)					       AFS Command Reference						 BACKUP_ADDHOST(8)

NAME
backup_addhost - Adds a Tape Coordinator entry to the Backup Database SYNOPSIS
backup addhost -tapehost <tape machine name> [-portoffset <TC port offset>] [-localauth] [-cell <cell name>] [-help] backup addh -t <tape machine name> [-p <TC port offset>] [-l] [-c <cell name>] [-h] DESCRIPTION
The backup addhost command creates a Tape Coordinator entry in the Backup Database. The entry records o The host name of the Tape Coordinator machine where the Tape Coordinator (butc) process runs, as specified with the -tapehost argument. o The Tape Coordinator's port offset number, as specified with the -portoffset argument. An entry for the port offset must also appear in the /var/lib/openafs/backup/tapeconfig file on the Tape Coordinator machine, where it is mapped to a UNIX device name (for a tape device) or pathname (for a backup data file). Each Tape Coordinator must have its own port offset number, and the command fails if a Backup Database entry already exists for the requested port offset number. To display existing Tape Coordinator entries, use the backup listhosts command. OPTIONS
-tapehost <tape machine name> Specifies the fully-qualified hostname of the machine for which to create a Tape Coordinator entry in the Backup Database. The machine must have an entry in either the cell's naming service (such as the Domain Name Service) or the host file (/etc/hosts or equivalent) on the machine where the command is issued. -portoffset <TC port offset> Specifies the Tape Coordinator's port offset number. Provide an integer from the range 0 through 58510, or omit this argument to use the default value of 0 (zero). The value must match the port offset number recorded for the same combination of Tape Coordinator and tape device or file in the /var/lib/openafs/backup/tapeconfig file on the Tape Coordinator machine named by the -tapehost argument. -localauth Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The backup command interpreter presents it to the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more details, see backup(8). -cell <cell name> Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8). -help Prints the online help for this command. All other valid options are ignored. EXAMPLES
The following command creates an entry in the Backup Database that assigns port offset number 4 to a Tape Coordinator running on the machine "backup1.abc.com": % backup addhost -tapehost backup1.abc.com -portoffset 4 The following command creates a Backup Database entry that assigns port offset number 0 to a Tape Coordinator on the machine "backup3.abc.com": % backup addhost backup3.abc.com PRIVILEGE REQUIRED
The issuer must be listed in the /etc/openafs/server/UserList file on every machine where the Backup Server is running, or must be logged onto a server machine as the local superuser "root" if the -localauth flag is included. SEE ALSO
backup(8), backup_delhost(8), backup_listhosts(8) COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved. This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. OpenAFS 2012-03-26 BACKUP_ADDHOST(8)
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