Date: Tue, 18 Oct 2016 09:08:03 +1100 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Freddie Cash <fjwcash@gmail.com> Cc: Lars Engels <lars.engels@0x20.net>, freebsd-ports <freebsd-ports@freebsd.org>, reko.turja@liukuma.net Subject: Re: Alternatives to rsync Message-ID: <20161017220803.GL20041@eureka.lemis.com> In-Reply-To: <CAOjFWZ6sVxNk4Vbj9VMsC61cF26zkKAp5S%2BneYxq8-HP4N=YgA@mail.gmail.com> References: <0F5C36816EB64D09B42932E21FBC6269@RIVENDELL> <F48A11DD9CAE468084DB17A1E582F78F@RIVENDELL> <20161016224631.GK20041@eureka.lemis.com> <20161017082117.GO65573@e-new.0x20.net> <CAOjFWZ6sVxNk4Vbj9VMsC61cF26zkKAp5S%2BneYxq8-HP4N=YgA@mail.gmail.com>
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--hl1kWnBARzJiTscN Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Monday, 17 October 2016 at 6:51:05 -0700, Freddie Cash wrote: > On Oct 17, 2016 1:21 AM, "Lars Engels" <lars.engels@0x20.net> wrote: >> >> rsync 2 has a different algorithm for checking if a file changed. The >> new one is much faster. > > Rsync 2 also spent a long time building a list of changes files first, > before transferring any data. > > Rsync 3 starts building the file list, then starts transferring data while > it continues to build the file list. This drops the total time spent by a > large factor. Our backup times dropped by about an hour per server > switching from 2 to 3. > > Something else to consider when looking at resurrecting version 2. I can see no good reason to use rsync 2 in favour of 3. But reko is concerned by the GPL number, not rsync number. The other thing to consider is whether rsync 2 is faster than the other alternative software. I suspect that it is. Greg -- Sent from my desktop computer. Finger grog@FreeBSD.org for PGP public key. See complete headers for address and phone numbers. This message is digitally signed. If your Microsoft mail program reports problems, please read http://lemis.com/broken-MUA --hl1kWnBARzJiTscN Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iEYEARECAAYFAlgFS8MACgkQIubykFB6QiOWpQCffocigPLidlnZp6tSvhMItghp g1oAn2YkP9PdmYaQOkqAng2mvknVcset =CMlC -----END PGP SIGNATURE----- --hl1kWnBARzJiTscN--
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