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Re: [Xen-users] Re: Upgrading xen from CentOS 5.0 to 5.2

To: "Sadique Puthen" <sputhenp@xxxxxxxxxx>

From: "Alain Barthe" <ab266061@xxxxxxxxx>

Date: Thu, 21 Aug 2008 09:51:21 +0200

Delivery-date: Thu, 21 Aug 2008 00:52:01 -0700

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List-id: Xen user discussion <xen-users.lists.xensource.com>

2008/8/20 Sadique Puthen <sputhenp@xxxxxxxxxx>

I don't have any idea about these problems. Ideally you should be able to migrate back to lower minor versions provided that the major version remains the same. ie, 5.2 -> 5.0.

I am just wondering what is preventing you from updating/upgrading the COS 5.0 system directly to 5.2 as vendors of these operating systems provide 99% guarantee not to break anything through such updates.

Nothing prevent us from upgrading our dom0 to CentOS5.2. We simply want to plan this upgrade so that no domU has to be shut down. The fact a domU can or can not be live migrated from the new version to the old one is important for this plan.

Thanks.

--Sadique

Should I understand that the way the memory is saved on COS 5.0 is not compatible with the one on COS5.2 ?

Thanks for your replies.

Alain.
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