[rdiff-backup-users] Backup performance

[Simon Hobson]

Is it normal for the target of a backup to show 100% wait-io during a backup ?

Backing up a Linux (Debian Lenny) system with about 1.6G in 55k files 
to another Debain Lenny system running nothing but rdiff-backup, I'm 
seeing the remote end showing 99 or 100% wait-io and the backup 
taking hours. The target directory is on an iSCSI volume, but a quick 
check shows that the performance on that volume isn't hugely less 
than a local hard drive.

The command running is :
  rdiff-backup \
    --backup-mode \
    --exclude-globbing-filelist /etc/backup-excludes \
    --preserve-numerical-ids \
    --ssh-no-compression \
    / backup::/store/backup

Both systems are guests on a Xen host with a 4core 2.4G processor and 
plenty of ram (the target currently has over 1G free). rdiff-backup 
is ver 1.2.1


Any hints ?

--
Simon Hobson

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