On 25 May 2011, at 11:47, Peter Grandi wrote:
> On 25/05/11 11:13, Wahid Bhimji wrote:
>
>> [ ... ] Also from DPM 1.8.2 it will be possible to upgrade
>> (using these non-official RPMs) if you are on SL4 but at
>> that point installation from scratch on SL4 will not be
>> supported even by them [ ... ]
>
> As to this, I remember some hints probably from SamS that
>
> * it is easy to upgrade the disk nodes from SL4/gLite 3.1 to
> SL5/gLite 3.2 as they are effectively stateless;
> * upgrading the disk nodes should be done before upgrading the
> DPM node;
This point above is not correct. You can have either an SL5 headnode and SL4 disk nodes or SL5 disk nodes and SL4 headnode. You may chose to do the disk nodes first as they are easier as you say.
> * a newer disk node will work with an older DPM node, so it does
> not need to be done all at once.
>
> I hope that I have remembered right as that is what I am set to do.
>
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