Hi,

I'm doing a backup on a Debian Etch server which runs a network/time  
critical app at -20 niceness, but even with nice -n19 bacula-fd still  
causes glitches (packetloss).

They seem to happen when the backup starts and ends, during the backup  
(doing 20-23 MB/s) there is no problem. An incremental backup that takes 5  
seconds still causes a glitch, although much smaller. Doing an 'estimate  
job=servername' via bconsole causes no glitch, but this is probably due to  
caching after the backup (returns immediately with the correct answer).  
This makes me think it is disk IO related (2x15K rpm SAS drives in RAID1  
on Dell Perc/5i - backup goes to other disk array over Gb Ethernet/Fiber).

Is there a way to solve this on the Bacula side? The server is normally  
using only a few percent CPU, with bacula-fd going up to 15-25% at most,  
it's scheduling, or some disk related holdup that seems to be the problem.


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