hi jeroen
backups...
i prefer find and tar
eg...
find /root /etc /home -mtime -$Days -type f -print |
egrep -v "$EXCLUDE_this_stuff" |
tar zcvf /Backup.Sunday/$HOST/$Year_$Mon/$Date_$Days.tgz -T -
use find to find files that has changed "today"
or last 7 days or last 30 days...
incremental backups should always start from the last
full backup....
- if one day of incremental backup fails...
all subsequent backups might not be any good..
i do backups only onto hard drives - 20gb - 500Gb of backup space
depending on the client
- tapes are too slow and too small
- tapes require somebody to do something on a daily/weekly basis
- cdrom/dvd is too small
daily, weekly, monthly incremental and full backups
of a 20Gb disk can usually be backed up to another 20Gb disk for
about 2-3 months .. than youhave to start purging...
( depends on data ...
- 3 entries in cron for incremental/full backups
- incremental backups should be on alternating different backup disks
- remove ONE backup disk/server and see if you can still restore
- plenty of unused disk space floating around on most lans
watch out for what if your backup failed due to multiple reasons...
- failed due to cron died
- failed due to 100% disk full
- failed due to network cable wiggled
- failed due to power failure
- failed due to flaky hardware ( cpu, mem, disk )
-
- you willfind that backup failed only when you needed
- unless you test/check it regularly...
- methodology has been tested...may times over the years..
when the primary disks failed... esp raid failures
have fun
alvin
http://www.Linux-Consulting.com
On Tue, 1 May 2001, Jeroen Valcke wrote:
> Hello,
>
> After the not so pleasant adventures of last night (see my previous mail
> "unattached inode") I started realizing that instead of my root fs the
> problems could have occured on my home partition, destroying valuable
> data. I must admit I don't make backups on a regular basis. Now and then I
> copy some important files to another (win) pc on my home LAN.
> So I need better backup. What do you use?
> What kind of media? Tape, CD, second hd, ...
> How to backup? one full backup every month, incremental every week?
> The cd solution probably has an advantage, since I could use the cd-writer
> for other cd-writing too.
>
> Thanks for your thoughts.
>
> --
> Jeroen Valcke jeroen@valcke.com
> ICQ# 30116911 Home page: http://www.valcke.com/jeroen
> Phone +32(0)56 32 91 37 Mobile +32(0)486 88 21 26
> "Je me souviens" (Quebec license plate)
>
>
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