Hi, In a similar situation, we use afio. It is like cpio but much more efficient.
Yves John Pettitt wrote: > Notes on migrating to bigger storage. > > Two weeks ago I asked about migrating to my BackupPC pool to bigger > storage. I got a number of responses and after some experimentation > reached the following conclusions: > > Suggestions: > > 1) dd the filesystem then expand it on the new storage. It's fast with > a good network you can max disk. Copying on the same machine I was bus > limited at ~40MB/sec. This is probably the best approach *if* you can > expand your filesystems. However it turns out that growfs on FreeBSD > is less than reliable with very large filesystems (in my case it > refused to grow a 600GB filesystem to 1TB exiting with an error about > seeking to a negative block number) Your experience may vary depending > on OS but you are strongly advised to test it first. > > 2) cp, pax, tar, rsync et al. All of the file copy programs have > severe limitations when dealing with BackupPC pools. The initial copy > file by file is slow (~ 1/3 to 1/4 of the dd copy speed) but the > subsequent creation of the hard linked backup trees for each client is > painfuly slow. I aborted my copy after three days with less than 25% > of the files linked. > > 3) Dump/restore – this has the potential to work well *if* you have a > lot of memory in the machine – the restore process on my machine ran > out of memory (I only have 1GB in the box) > > 4) Don’t bother. This is the approach I finally chose – I decided to > just create a new server and let it start backing up hosts and at the > same time turn off the old server but keep that data until I have a > cycle with at least two full backups for each host. A hybrid approach > using this and pax/cp/tar should also be possible copying only the > pool. Turning off the nightly cleanup jobs and running a full backup > to create new backup tress linked to the pool then once that has run > re-enabling nightly clean up. > > Other data points – The Box is an old slow Celeron 2.93 Ghz box with > 1GB ram and a highpoint raid card with 6 WD250 IDE drives running > FreeBSD 6.2. BackupPC version is 3.0beta3. Backup pool is ~ 300GB and > contains uses 9 million inodes. File systems are ufs2 with > soft-updates enabled. > > John > >------------------------------------------------------------------------ > >------------------------------------------------------------------------- >Take Surveys. Earn Cash. Influence the Future of IT >Join SourceForge.net's Techsay panel and you'll get the chance to share your >opinions on IT & business topics through brief surveys - and earn cash >http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > >------------------------------------------------------------------------ > >_______________________________________________ >BackupPC-users mailing list >BackupPC-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/backuppc-users >http://backuppc.sourceforge.net/ > > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
