Re: rsync algorithm for large files

2009-09-05 Thread Shachar Shemesh
ehar...@lyricsemiconductors.com wrote: I thought rsync, would calculate checksums of large files that have changed timestamps or filesizes, and send only the chunks which changed. Is this not correct? My goal is to come up with a reasonable (fast and efficient) way for me to daily

RE: rsync algorithm for large files

2009-09-05 Thread eharvey
Yup, by doing --inplace, I got down from 30 mins to 24 mins... So that's slightly better than resending the whole file again. However, this doesn't really do what I was hoping to do. Perhaps it can't be done, or somebody would like to recommend some other product that is more well suited for

rsync algorithm for large files

2009-09-04 Thread eharvey
I thought rsync, would calculate checksums of large files that have changed timestamps or filesizes, and send only the chunks which changed. Is this not correct? My goal is to come up with a reasonable (fast and efficient) way for me to daily incrementally backup my Parallels virtual machine (a

Re: rsync algorithm for large files

2009-09-04 Thread Matthias Schniedermeyer
On 04.09.2009 18:00, ehar...@lyricsemiconductors.com wrote: Why does it take longer the 3rd time I run it? Shouldn?t the performance always be **at least** as good as the initial sync? Not per se. First you have to determine THAT the file has changed, then the file is synced if there was a

Re: rsync algorithm for large files

2009-09-04 Thread Carlos Carvalho
Matthias Schniedermeyer (m...@citd.de) wrote on 5 September 2009 00:34: On 04.09.2009 18:00, ehar...@lyricsemiconductors.com wrote: Why does it take longer the 3rd time I run it? Shouldn?t the performance always be **at least** as good as the initial sync? Not per se. First you have