Hello,

recently we were forced to re-setup a large BackupPC-server with up to 
150 clients and 5.0TB (12 disks in RAID10). This was several weeks ago.

Unfortunately the server has problems keeping up with the backups since 
then. (see 
http://sourceforge.net/mailarchive/message.php?msg_id=29433950) Even 
after enabling rsync checksum caching and playing around with raising or 
lowering MaxBackups, MaxPendingCmds, the server doesn't scale as 
expected. And just for the record: before the re-setup, it managed the 
same amount of backups and the same hosts.

Now while comparing BackupPC logs to another big BackupPC-server on our 
side, I recognized that BackupPC-Link takes ages for every backupped 
host on the new server, while it's incredibly fast on the other BackupPC 
server.

Even for hosts with several 100GB of data, BackupPC_Link takes only few 
minutes on the old BackupPC server. On the new (re-setup) one, it takes 
several hours up to days for backupped hosts.

Do you have any idea or suggestions why BackupPC_Link takes that long 
and how we can change it?

Best regards,
  jonas



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