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William McKee wrote:
> I use VMware on a co-lo server which has 3 guestts that all get backed
> up by BackupPC. I could identify that the host was transmitting massive
> amounts of data (130Gb) which appeared to be coming from one of the
> three guests. However, I couldn't figure out which guest was pushing out
> the excessive data.
> 
> I went through the usual log files without much luck. I then checked the
> ifconfig output which all looked normal inside the hosts. Once I finally
> looked at the BackupPC logs for the guest server, I realized what was
> happening and corrected the issue by removing my bad entry. I also added
> --bwlimit to the RsyncArgs setting in config.pl to control maxing out my
> bandwidth.
> 
> However, this all took longer than I'd have liked. I'm stumped as to why
> the data transmitted off of the guest did not show up in the ifconfig
> output. I know that the guest is sending data via rsync based on the
> logs. However it's not showing up in the ifconfig stats (see below). Is
> this due to the way that rsync works? I was sending about 450Mb of data
> every 1-2 hrs from 8pm - 6am (I can send the logs if that would be of
> any help). I've included below the ifconfig outputs for the host
> (massive TX bytes) and the guest (normal TX bytes). I would have
> expected a corresponding amount of TX bytes for the guest. Thanks for
> any insight.

I would suspect vmware has something to do with that. Try creating
traffic with any other tool, and it likely won't be counted in the way
you think it should as well.

Another option is perhaps the counters wrapped due to the amount of
data... so if they wrapped recently, then the values will be very small,
even though a huge amount of data has been transmitted.

There is nothing special that rsync does to cause it's bandwidth not to
be counted normally (AFAIK).

Regards,
Adam
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