CentOS - Feb 2010 - Backup solution to backup /var/spool/imap above 150GB data

Hi

We have  an issue with one of our clients , they have a mail server with
the  /var/spool/imap partition as 150 GB . They need to take differential
backup on to /backup partition ( a different HDD  of total 250 GB space )  .
We have tried dar , rsync, rdiff and impasync . But its is not sufficing the
need as to take a lot of time and consumes a lot of I/O .

Is there any back up solution that you can think of , that can work in this
situation  - open source or proprietary

-- 
Regards
Agnello D'souza
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2010/2/24 Agnello George <agnello.dsouza at
gmail.com>:
> Hi
>
> We have? an issue with one of our clients , they have a mail server with
> the? /var/spool/imap partition as 150 GB . They need to take differential
> backup on to /backup partition ( a different HDD? of total 250 GB space )?
.
> We have tried dar , rsync, rdiff and impasync . But its is not sufficing
the
> need as to take a lot of time and consumes a lot of I/O .
So, you need to add more disk i/o? (so, add some disk space with faster raid?)

Take a look at: http://rdiff-backup.nongnu.org/

--
Eero

Dne 24.2.2010 10:00, Agnello George napsal(a):
> Hi
> 
> We have  an issue with one of our clients , they have a mail server with
> the  /var/spool/imap partition as 150 GB . They need to take differential
> backup on to /backup partition ( a different HDD  of total 250 GB space ) 
.
> We have tried dar , rsync, rdiff and impasync . But its is not sufficing
the
> need as to take a lot of time and consumes a lot of I/O .
> 
> Is there any back up solution that you can think of , that can work in this
> situation  - open source or proprietary
Is seems to me, that you are using mbox format. So, differential backup
is hard to achieve. Migrate to maildir, every mail is a file, easy to
backup differentially.
David

Agnello George wrote:
> Hi
> 
> We have  an issue with one of our clients , they have a mail server with 
> the  /var/spool/imap partition as 150 GB . They need to take 
> differential  backup on to /backup partition ( a different HDD  of total 
> 250 GB space )  . We have tried dar , rsync, rdiff and impasync . But 
> its is not sufficing the need as to take a lot of time and consumes a 
> lot of I/O .
> 
> Is there any back up solution that you can think of , that can work in 
> this situation  - open source or proprietary     
If you are just concerned about a single disk failure you could set up RAID1 on 
the disks (with some downtime to rebuild...) to keep the copy in realtime with 
little loss of speed.

Rsync should work as well as anything for snapshots but you might need to update
to a 3.x version to speed up handling large numbers of files.  The 2.x version 
included in Centos will read the entire directory tree into memory before 
starting the comparisons and copies.  The rpmforge repo has a packaged 3.0.7 
version but I haven't tried it.

-- 
   Les Mikesell
    lesmikesell at gmail.com

Agnello George wrote:
> Hi
> 
> We have  an issue with one of our clients , they have a mail server with
> the  /var/spool/imap partition as 150 GB . They need to take differential
> backup on to /backup partition ( a different HDD  of total 250 GB space ) 
.
You've stated things in terms of solutions. You may possibly get better
answers if you state your goal. There is some capability you are
trying to achieve. Tell us what that is, and you may make more progress.

IOW, what is the purpose of the backup? As one mentioned, RAID may
handle your needs.

Mike
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