Simple question about the x86_64 arch

Support for the other architectures (X86_64, IA-64, and PowerPC)
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Simple question about the x86_64 arch

Post by AaronJAnderson » 2011/04/18 13:29:08

I'm deploying some 64bit CentOS boxes for the first time. I'm just curious about how the packages work for this architecture.

Why are there 2 packages installed? (FLAC in this example, just picked something random)

Why is the x86_64 package not sufficient?

Package flac-1.1.2-28.el5_0.1.x86_64 already installed and latest version
Package flac-1.1.2-28.el5_0.1.i386 already installed and latest version

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Re: Simple question about the x86_64 arch

Post by scottro » 2011/04/18 15:55:34

It seems to be a case by case thing (although there's almost certainly some rhyme or reason, but I've never really checked.)

Some things, for example, skype (to use a bad example, as it's not part of the official repos) will only run in 32 bit, so you will need 32 bit libs.

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Simple question about the x86_64 arch

Post by pschaff » 2011/04/18 18:40:47

Welcome to the CentOS fora. Reading [url=]FAQ & Readme First[/url] is recommended for new users.

Please see also:
[url=]FAQ#22. I installed the x86_64 version, so why do I have i386 packages, and can I get rid of them?[/url]

Note that as Scott points out you may need i386 packages for compatibility with some applications, but if you don't, then a "pure" x86_64 system is possible.

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