List Receiver wrote:
> I've got a BackupPC 3.0 system in place that is backing up a couple dozen
> hosts. Most of the hosts are Windows boxes running Rsyncd, and they backup
> just fine. One of my hosts, however, can't seem to complete an incremental
> run for the life of it. A full run completes, but takes a long time to do so
> (almost a full 24 hours). Basically every incremental run times out or is
> interrupted by the hosts Internet connection (it's backed up over a WAN link
> to the BackupPC server).
>
> This system *used* to do incremental backups just fine, but one day, it quit.
> I've upgraded the rsyncd code to the latest available on SF, I've restarted
> the service a few times, I've watched the system with Task Manager while the
> backup is running and not noticed anything using high resources. Rsyncd acts
> as though it's disk-bound, by which I mean that it occupies very little CPU
> time or memory while it pulls the list of changed files together. Kernel
> time on the system during the generation process is almost non-existant,
> though. Once the backup run actually generates a transfer PID, the usage
> drops even lower. It's like there's a 200ms timeout between each command
> that rsyncd receives and fulfills.
>
> Has anyone seen anything like this before? Any idea how I should go about
> troubleshooting it?
>
This sounds like something unique to your wan link. Is it possible that
it times out and drops idle connections? Rsync transfers the entire
directory listing first, then the server walks through the whole list
and on incrementals it only transfers anything when differences are
found in the directory contents. If you have a large set of files with
few changes you might have long periods of idle time and some network
devices like nat routers may drop idle connections after timeout period
- usually these are long, but perhaps something is misconfigured.
--
Les Mikesell
[EMAIL PROTECTED]
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