On Mon, 2009-11-16 at 11:06 +0100, Ralph Angenendt wrote: > Am 14.11.09 16:08, schrieb Farkas Levente: > > hi > > what's the current status of deltarpms and presto for centos? i'm just > > rebuild deltarpms, presto-utils, yum-presto packages from fedora for > > centos. is there any plan to add them to centos extras? what's the > > current state? i'm interested about not just using but generating > > deltarpms enabled repositories. imho it can save a lot's of bandwith for > > everybody (not to mention if presto will use google's courgette > > algorithm too). > > Do you have any metrics? > > Like: Updates for 5.x are x GB without prestom but only y GB with > presto? How much additional space will be required on the mirrors? Other > things which might be needed to make a decision? In my presto-enabled CentOS 5.4 i386 mirror, the deltarpms take up 91MB (compared to 1.2GB for the actual RPMS). Total savings tends to be anywhere from 60%-80%, though YMMV. Large packages like openoffice tend to delta well, while packages with lots of compressed files tend to delta poorly. In a rather extreme example, openoffice.org-core-2.3.0-6.11.el5_4.1 is 88MB. The deltarpm from 2.3.0-6.11.el5 is 917K. In a more normal example, kernel-PAE-2.6.18-164.6.1.el5 is 16M, while the deltarpm from 2.6.18-164.2.1.el5 is 2.5MB. Jonathan -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: This is a digitally signed message part URL: <http://lists.centos.org/pipermail/centos-devel/attachments/20091116/669a0955/attachment-0005.sig>