[Box Backup] child bbstored process ramping up to 100% cpu during bbackupd sync?

reticent boxbackup at fluffy.co.uk
Tue Feb 1 23:57:51 GMT 2005


Ok, i've taken a copy of the entire dataset from the system that i was 
talking about previously and copied it over to my workstation.

Linux2.6, 2ghz p4 from a linux2.4, 500mhz dual p3

Both the server and the client are running on the same machine

Dataset is 346M in size (on reiserfs, 2.0G on ext3)
Contains ~350,000 directories and ~8,000 files of 10-60kB


Transfer rate is roughly 30-70kB/sec
Jumping to 200-400kB/sec sporadically


After three hours, it is roughly 40% complete its sync.

5 minutes into the backup, CPU usage was at 50-90% by the bbstored process

Original Drive usage of dataset on a reiser3 fs is 346M
Drive useage of dataset on reiser3 fs after bbackup sync is 1.6G (stored 
by bbstored)
(For reference, the same dataset on an ext3 partition takes up 2G)


So it seems that the amount of directories is (understandably) causing 
the huge load, making it impossible to use Boxbackup on this dataset.

The amount of size it occupies is a bit surprising, but i know little of 
the mechanics of Boxbackup so these are only observations.



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