ADSM-L

Re: Open file and image backups on Linux

2004-10-26 15:20:00
Subject: Re: Open file and image backups on Linux
From: Sandra <sadi AT SUPER.NET DOT PK>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 27 Oct 2004 00:27:41 +0500
GREATTTTT Stef,
Yes, this backup will be used in disaster recovery.

That means i should not go for image backup, but just incremental every would do
fine.
!!!

Sandra

Stef Coene wrote:

> On Tuesday 26 October 2004 19:37, Sandra wrote:
> > Dear Mark,
> > I am confused again.
> Me too :)
>
> > See, I need to take backup (image or incremental) of entire system.
> > IMAGETYPE is one things, and running fsck later on after restore is
> > another.
> Why?  What do you want to do?  Do a disaster recovery?  Then you never need
> images, only incremental backups.
>
> > Now question is, BMR is actually something, that will backup and then
> > restore the entire system in one go. Image is the solution for this
> > probably.
> >
> > Now, If i take Image backup and my machine crashes, all i need to do is to
> > install my OS and BA client, and start the restore of the image of all the
> > file systems (including system file system). This way when i am going to
> > restart after this, i will be on the same level as the image was, onlly
> > thing that i would do is to run fsck if there is any problem.
> My DR scenario:
> - AIX: mksysb rules :)).  Mksysb is a bootable tape (or cd, dvd, or network)
> that restores a single AIX server in 1 go.  I did a test restore of a cluster
> node with TSM and domino and after 45 min the minutes was up and running !!!
> I started HACMP and TSM and domino were up and running without any problems.
> Use mksysb on a local tape for the TSM server (+ TSM db backup to disk ona
> filesystem in rootvg) and nim (network mksysb) for the AIX clients.
>
> - Windows: CBMR is cool.  I used CBMR to restore a TSM server and it woked
> flawless.  This was on a local, single, dedicated lto tape.  CBMR is also
> network aware so you can backup over the network directly to a TSM server.
> If you don't use CBMR, you have to do it manually as described in the docs.
> Or ASR, available in 2003 and XP.  With ASR, you can boot from a CD (windows +
> TSM client) and recover everything directly from the TSM server.
>
> - Linux: I never tried it, but there are a lot of tricks you can use.  I
> should install a basic linux in a partition, recreate the original partition,
> mounts them and restore everything.  You can boot from cd or change the
> bootloader to load the fresh restored linux.
> I know Cristie was working on a linux version of the CBMR software, but I
> don't know if it's finished.
>
> > IMPORTANT: when i will initiate the image backup, the only thing that would
> > be running would be those OS files and no application other than that. If
> > there is some system file that is open in for exampple in /usr, and there
> > is no application that is using that file, then it will be backed up?? Am i
> > right?
> Yes, with *unix you can backup any file you want, even open files.  But the
> backup may be inconsistent.  It also depends if the file is open read-only of
> read-write and if it's changed or not.  Also, TSM will try by default 3 times
> to backup a changed file.
> So, unless you have a database running, only log files are changed.  And you
> don't care about log files, they will not prevent you from doing a disaster
> restore.
>
> > I m using Linux................... !!!!!!!!!!!!!!!!!!!!!!!!
> Good choice :)
>
> Stef
>
> --
> stef.coene AT docum DOT org
>  "Using Linux as bandwidth manager"
>      http://www.docum.org/