Evren Yurtesen wrote: > Renke Brausse wrote: >> Hello Tony, >> >>> I've written before about backups involving very big files that >>> seem to execute slowly. >>> >> >>> What can be slowing things down so much? Except for this operation, >>> everything else runs about as I would expect. >> >> I have no clue what the reason is but I experienced that backups of >> large files are much faster with tar over ssh instead of rsync over ssh. >> >> Not an explanation but maybe this can solve your problem. >> > > I believe the reason for this is how rsync works. It normally tries to > transfer only the changed parts of the file. This is to save > bandwidth, to do this, it has to scan the whole file on both sides(I > guess). This is unnecessary unless you are over slow links. You might > want to try the whole-file option with rsync: > > -W, --whole-file copy files whole (w/o delta-xfer > algorithm) > > Please let us know the results, as a side-note if you still want to > shrink the transferred file size you can use the ssh compression with > -C option of ssh. > > Thanks, > Evren Thank you, I will try that. Might be a few days before I have anything to report. Tony
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