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diff --git a/zarb-ml/mageia-discuss/20101106/002936.html b/zarb-ml/mageia-discuss/20101106/002936.html new file mode 100644 index 000000000..0d3d6df38 --- /dev/null +++ b/zarb-ml/mageia-discuss/20101106/002936.html @@ -0,0 +1,162 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML> + <HEAD> + <TITLE> [Mageia-discuss] Suggestions for the ISO + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20Suggestions%20for%20the%20ISO&In-Reply-To=%3C4CD5A543.9040309%40laposte.net%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="002939.html"> + <LINK REL="Next" HREF="002938.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[Mageia-discuss] Suggestions for the ISO</H1> + <B>andre999</B> + <A HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20Suggestions%20for%20the%20ISO&In-Reply-To=%3C4CD5A543.9040309%40laposte.net%3E" + TITLE="[Mageia-discuss] Suggestions for the ISO">andr55 at laposte.net + </A><BR> + <I>Sat Nov 6 19:58:11 CET 2010</I> + <P><UL> + <LI>Previous message: <A HREF="002939.html">[Mageia-discuss] Suggestions for the ISO +</A></li> + <LI>Next message: <A HREF="002938.html">[Mageia-discuss] Suggestions for the ISO +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#2936">[ date ]</a> + <a href="thread.html#2936">[ thread ]</a> + <a href="subject.html#2936">[ subject ]</a> + <a href="author.html#2936">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>Olivier Thauvin a écrit : +><i> * andre999 (<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">andr55 at laposte.net</A>) wrote: +</I>><i> +</I>>>><i> * andre999 (<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">andr55 at laposte.net</A>) wrote: +</I>>>><i> +</I>>>><i> +</I>>>>><i> Donald Stewart a écrit : +</I>>>>><i> +</I>>>>><i> +</I>>>><i> The problem of delta rpm is the work need to generated alls delta and +</I>>>><i> the space need on mirrors to host everything. +</I>>>><i> We must provide delta for each version to the next one: +</I>>>><i> +</I>>>><i> - main foo-1 +</I>>>><i> - upd foo-2 D: 1->2 +</I>>>><i> foo-3 D: 2->3 and 1->3 ? +</I>>>><i> foo-4 D: 3->4 and 1->4, 2->4 ? +</I>>>><i> +</I>>>><i> +</I>>><i> I would make all delta updates relative to the distro release, i.e. +</I>>><i> - main = foo-1 +</I>>><i> - upd_full = foo-2, foo-3, foo-4, etc +</I>>><i> - upd_delta = foo-1>2, foo-1>3, foo-1>4, etc +</I>>><i> without foo 2>3, 2>4, 3>4 +</I>>><i> (so half as many, with 3 updates.) +</I>>><i> +</I>>><i> Note that the idea is to retain full update packages, the delta updates +</I>>><i> being a file-by-file diff of contained files (probably in their own +</I>>><i> repository). +</I>>><i> +</I>><i> That mean people udapting frequently their distribution will not profit +</I>><i> of delta rpm, then downloading the full rpm as soon they made one +</I>><i> update. +</I>><i> +</I>><i> Delta rpm will become not so usefull then, except for new install. +</I>><i> +</I>Don't think so. I follow closely changes in Mozilla Seamonkey, for +example, and changes are very small with each update. I would say much +less than 1% of the files, by the space taken. +I think that this is typical. +However, for much smaller programs, it could be that after cumulative +updates, the delta update is the same size as a full update - but never +bigger (except maybe a few bytes). +>>><i> etc... +</I>>>><i> What if delta 1->4 is bigger than the package itself ? and for 2->4 ? +</I>>>><i> +</I>>>><i> +</I>>><i> Highly improbable, as I conceive it. +</I>>><i> If foo-1.rpm contains files fooa foob fooc food, and only foob changes +</I>>><i> to foob', +</I>>><i> then full foo-2.rpm contains files fooa foob' fooc food +</I>>><i> and delta foo-2d.rpm contains only file foob', with the info that this +</I>>><i> replaces foob. +</I>>><i> And of course with this model, there is no 2->4. +</I>>><i> +</I>><i> Changes between 1->4 will probably be bigger than 2->4 as there is more +</I>><i> changes between them. +</I>><i> +</I>Evidently. The deltas will tend to become bigger with each update. But +remaining generally much smaller than a full update. +>>><i> Delta rpm is hard to manage (any volunteer to write the tools to manage +</I>>>><i> this ?) and as bonus, I am not sure it is still compatible with our +</I>>>><i> current rpm... +</I>>>><i> +</I>>>><i> +</I>>><i> To create a delta rpm, one only needs the new full version (or the +</I>>><i> proposed contents), and a script which automatically includes the new +</I>>><i> files with the references to those replaced. +</I>>><i> I'm not trying to say it is simple to write - especially since I +</I>>><i> understand that the current tools are written in Perl - which has a +</I>>><i> syntax which I barely understand. +</I>>><i> But I'd be interested in contributing to my ability. +</I>>><i> +</I>><i> Nothing deny you to start to work on this and then submit you code. It's +</I>><i> what I did for the mirrors tools :) +</I>><i> +</I>Good idea :) +The arrival of Mageia is motivating me to contribute more, something +I've always put off doing with Mandriva (except to Bugzilla and forums). +Maybe I can find a language a bit more friendly (to me) than Perl ? +><i> We'll see when BS and SVN will be ready to merge it if it works. +</I>><i> +</I>>>><i> Just think we don't have an infinite space on mirror. Even the sound +</I>>>><i> good, please try to estimated the cost it can be per release. +</I>>>><i> +</I>>>><i> +</I>>><i> I agree it would take more space on mirrors, but as full updates take +</I>>><i> much less space than the release, +</I>>><i> delta updates would take considerably less space the full updates. +</I>>><i> Also, the lower bandwidth to download for users would also benefit the +</I>>><i> mirrors. +</I>>><i> +</I>><i> You know, most of our rpms are less than 10MB, but du -sh is clear, the +</I>><i> distribution is around 35GB per arch. +</I>><i> +</I>><i> Nothing is really big on mirrors, but the results is. +</I>><i> +</I>But if we can reduce 10MB updates to 1MB, that would be a big benefit +for downloading updates. Especially for low bandwidth users. +And I think that the % update will likely be much more than that. +Don't forget that commercial updates (often erroneously referred to as +patches) are often delta (by file) updates, as being proposed. + +- André +</PRE> + + + + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="002939.html">[Mageia-discuss] Suggestions for the ISO +</A></li> + <LI>Next message: <A HREF="002938.html">[Mageia-discuss] Suggestions for the ISO +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#2936">[ date ]</a> + <a href="thread.html#2936">[ thread ]</a> + <a href="subject.html#2936">[ subject ]</a> + <a href="author.html#2936">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://www.mageia.org/mailman/listinfo/mageia-discuss">More information about the Mageia-discuss +mailing list</a><br> +</body></html> |