Comments on: Most efficient ways to download http://dev.compiz.org/~cyberorg/2009/04/11/most-efficient-ways-to-download/ openSUSE, Compiz and allied things Fri, 12 Mar 2010 17:07:31 +0000 http://wordpress.org/?v=2.6.3 By: robermann79 http://dev.compiz.org/~cyberorg/2009/04/11/most-efficient-ways-to-download/#comment-5659 robermann79 Sun, 12 Apr 2009 07:03:35 +0000 http://dev.compiz-fusion.org/~cyberorg/?p=279#comment-5659 An open source .NET (C#) implementation: http://gdiff.codeplex.com/ with MPL license An open source .NET (C#) implementation:
http://gdiff.codeplex.com/
with MPL license

]]> By: roberto mannai http://dev.compiz.org/~cyberorg/2009/04/11/most-efficient-ways-to-download/#comment-5656 roberto mannai Sat, 11 Apr 2009 12:04:03 +0000 http://dev.compiz-fusion.org/~cyberorg/?p=279#comment-5656 Hi cyberorg, the best way to download incrementally only the diff of a binary file, for my best knowledge, is using the GDIFF protocol, who was submitted ten years ago to the W3C consortium: http://www.w3.org/TR/NOTE-gdiff-19970901 I know for sure that a commercial product of Configuration Management (Marimba, now buyed by BMC - see www.marimba.com) use it, implemented in Java: it is very useful in low bandwidth nets, when downloading a service pack, for example. I don't know if one person could use that Java algorithm implementation, anyway, being a commercial application. Other implementations are in PERL and RUBY: http://search.cpan.org/~geoffr/Algorithm-GDiffDelta-0.01/GDiffDelta.pm http://webscripts.softpedia.com/script/Development-Scripts-js/gdiff-gpatch-18695.html I cannot understand why that algorithm is not widely used, given its quality; it shoud be useful if it was available when downloading large files like ISOs or VM images! Maybe on openfate you could add a request !! :) Hi cyberorg,
the best way to download incrementally only the diff of a binary file, for my best knowledge, is using the GDIFF protocol, who was submitted ten years ago to the W3C consortium: http://www.w3.org/TR/NOTE-gdiff-19970901

I know for sure that a commercial product of Configuration Management (Marimba, now buyed by BMC - see http://www.marimba.com) use it, implemented in Java: it is very useful in low bandwidth nets, when downloading a service pack, for example. I don’t know if one person could use that Java algorithm implementation, anyway, being a commercial application.

Other implementations are in PERL and RUBY:
http://search.cpan.org/~geoffr/Algorithm-GDiffDelta-0.01/GDiffDelta.pm
http://webscripts.softpedia.com/script/Development-Scripts-js/gdiff-gpatch-18695.html

I cannot understand why that algorithm is not widely used, given its quality; it shoud be useful if it was available when downloading large files like ISOs or VM images! Maybe on openfate you could add a request !! :)

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