> -----Original Message----- > From: Les Mikesell [mailto:[EMAIL PROTECTED] > Sent: Friday, October 19, 2007 4:12 PM > To: List Receiver > Cc: [email protected] > Subject: Re: [BackupPC-users] Rsync fulls complete, but incrementals > don't > > List Receiver wrote: > > > >>> 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. > > > > This is definitely possible. This particular host does have a lot of > small files that are being backed up. > > > > I thought rsync transfers didn't really do much differently whether > the run in BackupPC was full or incremental. I thought in both cases > you're basically still only transferring the changes. Am I way off > base here? > > Incrementals completely skip files where the directory timestamp and > lengths match the previous. Fulls set the rsync option to do block > checksum comparisons on every file. The latter takes a lot longer > overall since it has to read the whole disk and doesn't use much more > bandwidth, but there would not be long periods of time when the line is > completely idle. > > -- > Les Mikesell > [EMAIL PROTECTED]
Got it. That makes sense to me. Thanks for the explanation. ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ BackupPC-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
