On Wed, 2009-01-07 at 21:20 +1100, Adam Goryachev wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > 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
I think Adam is spot on. AFAIK, ifconfig receives its byte data from the proc subsystem and on 32 bit systems will wrap at 4 gigs. Regards, Royden ------------------------------------------------------------------------------ Check out the new SourceForge.net Marketplace. It is the best place to buy or sell services for just about anything Open Source. http://p.sf.net/sfu/Xq1LFB _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
