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Old 01-30-2011, 06:37 PM
Chuck Munro
 
Default RHEL-6 vs. CentOS-5.5 (was: Static assignment of SCSI device names?)

Hello list members,

My adventure into udev rules has taken an interesting turn. I did
discover a stupid error in the way I was attempting to assign static
disk device names on CentOS-5.5, so that's out of the way.

But in the process of exploring, I installed a trial copy of RHEL-6 on
the new machine to see if anything had changed (since I intend this box
to run CentOS-6 anyway).

Lots of differences, and it's obvious that RedHat does things a bit
differently here and there. My focus has been on figuring out how best
to solve my udev challenge, and I found that tools like 'scsi_id' and
udev admin/test commands have changed. The udev rules themselves seem
to be the same.

Regarding networking, all of my 'ifcfg-*' files from CentOS-5.5 worked
well, including bridging for KVM. Of course, one of the first things I
did was remove that atrocious NetworkManager package ... it needs to be
rewritten to make it a *lot* more intuitive. RedHat uses it during
installation to manually configure the NICs, which I think is a
mistake. I much prefer the way CentOS anaconda has done it so far, as a
separate install menu form.

The performance of the machine seemed to be better with the newer
kernel, which is encouraging. I suspect we can look forward to a number
of improvements. I've just managed to scratch the surface. I do expect
there may be a few challenges for those of us upgrading a system from
5.x to 6, where some user-written admin scripts could break depending on
the system commands they use.

I look forward to CentOS-6 and all the goodies we can expect, and I'm
quite happy to wait until the CentOS crew does their thing before
releasing it ... they deserve a lot of credit for doing a thorough job
all these years.

Chuck

_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
 
Old 01-30-2011, 07:13 PM
Robert Heller
 
Default RHEL-6 vs. CentOS-5.5 (was: Static assignment of SCSI device names?)

At Sun, 30 Jan 2011 11:37:19 -0800 CentOS mailing list <centos@centos.org> wrote:

>
> Hello list members,
>
> My adventure into udev rules has taken an interesting turn. I did
> discover a stupid error in the way I was attempting to assign static
> disk device names on CentOS-5.5, so that's out of the way.
>
> But in the process of exploring, I installed a trial copy of RHEL-6 on
> the new machine to see if anything had changed (since I intend this box
> to run CentOS-6 anyway).
>
> Lots of differences, and it's obvious that RedHat does things a bit
> differently here and there. My focus has been on figuring out how best
> to solve my udev challenge, and I found that tools like 'scsi_id' and
> udev admin/test commands have changed. The udev rules themselves seem
> to be the same.
>
> Regarding networking, all of my 'ifcfg-*' files from CentOS-5.5 worked
> well, including bridging for KVM. Of course, one of the first things I
> did was remove that atrocious NetworkManager package ... it needs to be
> rewritten to make it a *lot* more intuitive. RedHat uses it during
> installation to manually configure the NICs, which I think is a
> mistake. I much prefer the way CentOS anaconda has done it so far, as a
> separate install menu form.

NetworkManager is fine for something like a laptop with a 'varying'
network environment, since it interfaces with the gnome-network-manager
applet, which gives one a little GUI thingy for selecting this or that
wireless hot spot, etc. For a machine with a *fixed* network
connection, NetworkManager just gets in the way and trys to be
excessively 'clever'.

>
> The performance of the machine seemed to be better with the newer
> kernel, which is encouraging. I suspect we can look forward to a number
> of improvements. I've just managed to scratch the surface. I do expect
> there may be a few challenges for those of us upgrading a system from
> 5.x to 6, where some user-written admin scripts could break depending on
> the system commands they use.
>
> I look forward to CentOS-6 and all the goodies we can expect, and I'm
> quite happy to wait until the CentOS crew does their thing before
> releasing it ... they deserve a lot of credit for doing a thorough job
> all these years.
>
> Chuck
>
> _______________________________________________
> CentOS mailing list
> CentOS@centos.org
> http://lists.centos.org/mailman/listinfo/centos
>
>

--
Robert Heller -- 978-544-6933 / heller@deepsoft.com
Deepwoods Software -- http://www.deepsoft.com/
() ascii ribbon campaign -- against html e-mail
/ www.asciiribbon.org -- against proprietary attachments



_______________________________________________
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http://lists.centos.org/mailman/listinfo/centos
 

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