Re: Backup schecduling

[Alvin Oga <aoga@Mail.Linux-Consulting.com>]

hi ya miquel

assuming you want to use two hard disk backups... ( must be important data
) ??

main# mkdir /Backup_1
main# mkdir /Backup_2

-- you should alternate between the two backup disks/servers
	- if your main disk and your backup_1 dies...you still have
	yesterday on Backup_2

have fun
alvin
http://www.Linux-Backup.net .. sample scripts ...

Use "date"... figure out if it even or odd days...
and mount the even or odd days backup_1 or backup_2

	miquel_backup.pl
	...
	if ( $odd ) {
	  mount Backup_1:/Backup_1 /Backup
	} else {
	  mount Backup_2:/Backup_2 /Backup
	}
	...
	--
	-- backup only changes since last full backup
	--
	find /home /etc /root -mtime -$cnt | tar zcvf /Backup/$DATE.tgz
	$cnt += 1
	...
	--
	-- you should do FULL backups once a week or once a month ???
	--
	-- there are major problems with doing just 24hr incrementals
	-- you should perform incrementals since last FULL backup...
	--

-- if you are worrying about intruders etc... you now have 3 boxes
   to worry about instead of just one

-- you should encrypt your backups if security is an issue

-- once a month...erase your old backups from few months ago... via cron

-- one day, when time is available...create a new test file...
	- backup it up by manually doing the backup....
	- pretend you just have a major primary disk failure
	- and try to restore everything from backup

-- now you can rest assured you have a reasonable backup ??

On Fri, 18 May 2001, Miquel Mart?n L?pez wrote:

> Hi all,
> I am trying to decide on backup schecduling and have several things in
> mind. My system is on a main hard disk, and backups are made by copying this
> HD to another (equal sized) one. 
> 
> Now, the point is I have one main HD and 2 backup HD, and have two criteria:
> 
> a) Backup every one or two days, alternating the backup disks, so that the
> oldest backup is max 4 days old, and the newest is just 2 
> 
> b) Backup every one or two days with the same backup disk, and make weekly
> backups with the other one.
> 
> As you see, it's a compromise between having updated backups and having the
> time to realize problems or intrusions.
> 
> So, just wondering, what do you do/suggest?
> Thanks!
> Miquel Martín
> 
> 
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