Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Support for the other architectures (X86_64, IA-64, and PowerPC)
wpflum
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Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by wpflum » 2010/02/01 18:25:38

I probably am going to have to do a complete wipe and reload of my desktop at work due to some issues I'm having. I originally went with the 32 bit version of CentOS 5.2 mainly because I thought I might have problems with application not being available. Now that it has been a bit since that original install and given that my system will support 64bit is there any reason I should not reinstall the 32 bit version instead of moving up to the 64 bit?? Do things like VirtualBox and wine function without problems??

I guess what I'd like to know is there a big enough benefit for me to do this or do any problems outweigh the upgrade??

Bill

pschaff
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Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by pschaff » 2010/02/01 18:48:05

That really depends on the specific 32-bit programs/plugins you need. In general 64-bit is pretty well supported. VirtualBox is not an issue. Can't say about Wine. May also want to see http://wiki.centos.org/TipsAndTricks/PluginsFor64BitFirefox

Best way to find out for sure is to try the x86_64 version as you're going to reinstall anyway. If you have to fall back you will have not lost a great deal of time/effort.

wpflum
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Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by wpflum » 2010/02/01 19:28:27

If this were my home machine I'd go ahead and do just that but this is my work PC so I can't waste time, even if it might only be a few hours.

Here's something else I'd like to find out about, just saw the icon on the desktop, how well does Lazarus/free pascal handle 64bit. Can I generate 32 bit stuff easily?? Pretty specific I know but I really would hate to get the system running and a month later go to do something and realize I really can't. I'm sure I can work around most things but I need to know if it would be worth it. What am I looking to gain using 64 bit over 32??

Bill

michaelnel
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Doing a re-install of 5.4 should I use the 64 or 32 bit vers

Post by michaelnel » 2010/02/01 20:10:52

[quote]
wpflum wrote:

What am I looking to gain using 64 bit over 32??

[/quote]

IME, not much. 64bit apps will run a little faster, and the system will recognize and use lots of RAM better.

wpflum
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Joined: 2009/06/18 14:52:16

Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by wpflum » 2010/02/01 20:32:55

I'm running 8 gigs of ram right now under the 32 bit system. Would I see anything substantial jumping to 64 bit?

Bill

michaelnel
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Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by michaelnel » 2010/02/01 21:10:08

[quote]
wpflum wrote:
I'm running 8 gigs of ram right now under the 32 bit system. Would I see anything substantial jumping to 64 bit?

Bill[/quote]

Unless you are running the PAE version of the 32bit kernel, you are probably really only able to access 3.2GB or less of that 8GB. With a PAE kernel you can use all of it, but access through PAE is slower than 64bit kernels.

I really don't see much performance gain with 64bit, but since 32bit stuff will run on 64bit OS, I don't really see any disadvantage to running 64bit.

wpflum
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Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by wpflum » 2010/02/01 21:19:21

I am running the PAE kernel, found that out the hard way after installing CentOS for the first time and realizing my memory wasn't there :-)

Is there anything out there that wont run on a 64bit system. I recall installing it back when I first was testing out CentOS and some programs wouldn't run. For the life of me I don't remember what they were but they were in the yum repositories at the time.

I'd love to run the 64 bit version, I just want to make sure i wont run into unseen problems later down the road.

Bill

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Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by pschaff » 2010/02/01 21:54:41

With 8GB for a work machine, I'd say go 64-bit. If you find anything essential that requires a "pure" 32-bit environment then install VirtualBox and run i386 CentOS in a VM. My $0.02 - take for what it's worth.

wpflum
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Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by wpflum » 2010/02/02 13:27:38

I'm leaning toward that at the moment. Do the major repositories, epel, rpmforge, etc have 64bit versions??

Bill

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Re: Doing a re-install of 5.4 should I use the 64 or 32 bit version??

Post by pschaff » 2010/02/02 15:09:45

Yes, but be very careful about mixing 3rd party repos. They may be mutually incompatible. Best if you pick the one that has what you want and stick to it. In any case, when using 3rd party repos I recommend the [url=http://wiki.centos.org/PackageManagement/Yum/Priorities]yum priorities plugin[/url], although not everyone will agree as you will see from reading the Wiki page.

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