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Re: Setup
2003-10-02 17:29:50
Hi,
Amanda doesn't exactly work the way you described. The most
important part of amanda is the scheduler. Amanda get an estimate about
how big a dump will be and figures out when to do its incremental and
full backups. You do have control of many aspects of amanda but it seems
to work the best if you set it up and don't touch it except for the
random tweak here and there. amadmin will let you force a full backup if
you need to and there are ways to trick amanda into doing a "archive"
(everything on one pass) backup but amanda's scheduler is very efficient
and will try to never waist tape space. Ex. at the moment I'm running
amanda to backup 1 SCO unix, 25 linux server, and 5 windows NT/2k
machines. A full backup takes 6-7 20/40 DLT tapes but daily backup use
about 2/3 of a single DLT tape. this is because my daily backups do a
level 0 every 2 weeks and then as many incremental the rest of the
week(s). I'll regularly see levels 2-4 dumps of big file systems. It may
make it a little difficult to do a full restore but can really save tape
space.
The other thing that sometimes confuses people is that amanda only
backups file systems.
if you have partitions for /, /var, /home, and /usr/local those will be
the entries in you disklist file. If amanda is using tar you can
exclude directories and files but you can't give amanda a directory to
backup that isn't an entire file system.
I have had to do a number of full restores ("bare metal restores"
it's sometimes called) and amanda is perfect for that.
I hope this helps some.
chrisj
Rohit Peyyeti wrote:
Hello All:
I have machines on my network which are mix of windows and unix machines.
Right now, I'm managing backups (both full and incremental) through perl
scripts written by me. They have been working fine for quite some time now
but are due for upgrade. I was planning to rewrite those scripts to make it
more effecient.
Recently somebody suggested me to take a look at amanda. I looks really neat
and cool to me. I have some doubts though (if it will work in my kind of
setup) I will try to explain about my setup below:
I have couple of linux servers and windows servers. I have indentified what
shares on those servers which needs to be backed up. I will be needing one
FULL backup for linux servers and another FULL for windows per week and I
should also be able to run daily incremental backups for both windows and
linux machines. FULL backups usually run into 15 GB and incremental close to
500 to 1 GB. Right now, I do some backups in the night and some in the
mornings (data is first written to some temp space where I pick it in the
mornings to write to the tape)
What I have is HP Tape drive (12/24) (without autoloader facility). Is this
kind of setup possible with Amanda? If yes, how do I go about setting it up?
Thanks
Rohit
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