BackupPC-users

Re: [BackupPC-users] Moving the Pool

2011-05-11 14:49:13
Subject: Re: [BackupPC-users] Moving the Pool
From: Timothy J Massey <tmassey AT obscorp DOT com>
To: "General list for user discussion, questions and support" <backuppc-users AT lists.sourceforge DOT net>
Date: Wed, 11 May 2011 14:44:17 -0400
Les Mikesell <lesmikesell AT gmail DOT com> wrote on 05/11/2011 01:18:45 PM:

> On 5/11/2011 10:45 AM, Michael Stowe wrote:
> >
> > Thought I'd mention that I'm in the process of moving my 1TB backup pool
> > from one jfs array to another on the same system.  Both arrays are RAID-5
> > via mdadm.
> >
> > I'm using "rsync -avP -H src dest," which I started Friday, nearly five
> > days ago.
>
> I doubt if most people want to go a week without running backups, and if
> your source changes after mapping the inodes for hardlinks you are going
> to have a problem.   It might be interesting to compare this to a dd or
> partclone image copy of the partition as long as you are going to the
> same filesystem type and have an equal or larger amount of space on the
> target (you should be able to resize larger after a copy).

That would have been my strong suggestion:  do a dd of the JFS partition and resize when done.  (Does parted understand JFS?  Use that if it does:  it'll be even faster.)

Given a pretty pedestrian 30MB/s transfer rate you're talking 10 hours to complete the copy.  Like Les said:  I can't imagine being able to take a production backup server down for a *week*, and if it's not a production server then you probably aren't copying the pool!  :)

Timothy J. Massey
 
Out of the Box Solutions, Inc.
Creative IT Solutions Made Simple!

http://www.OutOfTheBoxSolutions.com
tmassey AT obscorp DOT com
      22108 Harper Ave.
St. Clair Shores, MI 48080
Office: (800)750-4OBS (4627)
Cell: (586)945-8796

------------------------------------------------------------------------------
Achieve unprecedented app performance and reliability
What every C/C++ and Fortran developer should know.
Learn how Intel has extended the reach of its next-generation tools
to help boost performance applications - inlcuding clusters.
http://p.sf.net/sfu/intel-dev2devmay
_______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List:    https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki:    http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/