|Malcolm on 13 Nov 2011 08:46:38 -0800|
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|Re: [PLUG] diagnosing slow Fedora boots w/bootchart, cont'd|
On 2011-11-09 4:09 AM, sean finney wrote:
On Tue, Nov 08, 2011 at 03:01:27PM -0500, Malcolm wrote:That's because they aren't the same thing. rpm is more like dpkg.yeah, but dpkg is also far better than rpm :)
I haven't really used plan dpkg much, so I can't compare.
If you want to compare apt against an rpm based system, it would be yum (on RedHat derivatives) or urpmi (on Mandriva derivatives). IMnshO, apt beats yum readily, but I definitely prefer urpmi.(disclaimer) I admit to not having a lot of experience with mandriva, especially nothing>= 2005.
The reason why apt outshines basically any package management system I've had to butt heads with is that it's based on solid design principles (a lot of that indirectly through Debian policy). So they got it really close to the mark on the first try, and since then have only had to incrementally improve on it.
and it's still enough of a pain to ask "what package in the repository contains file X" that it's faster to use google.
If you look at a lot of the rpm-derived systems, this clearly wasn't a priority in the lower layer (rpm), and on top of that they didn't introduce this higher layer (up2date/yum/etc) of packagement management until much later, did *not* get it right on the first try, had to pile lots of extra crap into it because the lower layer was also lacking a lot of featuers/functionality, and *still* weren't able to produce a system with a comparable level of functionality.
Oh, I totally agree on the RedHat side.
Eventually the higher layer became unteneable to use/maintain, and someone would write up a clean-slate new implementation. Just look at SuSE, which seems to have a new package manager every single release (seriously!)
I haven't used SuSE to know how they've done it.
It's less ridiculous on RH-derived systems in that respect, but if you look at the change history for yum, how many times they've needed to entirely change the package metadata format, etc, it still feels like the ground that it's built on is not as solid as deb-derived distros'.
The urpmi format changes have been additions, not the underlying structure (adding incremental support so you don't have to download the entire metadata block for a large repository if they just updated a couple of packages; and adding a "light" format that just contains enough to do installs and dependencies - similar to what apt seems to use, with the "heavy" format downloaded if you ask it for something that needs it - like "what package that I don't have installed provides X").
urpmi is one of the reasons I've stuck with Mandrake/Mandriva/Mageia so long.
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