Hello David an Rod,
David, you are right about the teras SE. Teras is not part of the upgrade of next week. We will have to look if it needs updates, and will contact atlas when we plan to upgrade its software.
The local BDII will disappear for a while however, and since the teras info is published in there this might lead to problems. BTW we don't think that everything will be down for a whole week, but cannot guarantee the stability of the services.
I would assume that getting data of teras using the RLS is still possible. Putting data on it is certainly not.
We can easily move the teras info to the RLS BDII temporarily. But I don't think the atlas BDII (or any other VO BDIIs) contain this RLS BDII yet.
Rod, are you able to check this out?
Kind regards,
Fokke Dijkstra
LHC Computer Grid - Rollout wrote:
> Hi Rod, Fokke,
>
> Fokke please confirm, but AFAIK the Atlas data is on a storage element
> (teras.sara.nl) that is NOT affected by the overall downtime
> of the compute site (matrix.sara.nl).
>
> We must make sure though that the publishing of teras is
> continued (like for the RLS).
>
> Fokke, can you confirm?
>
> DavidG.
>
> Rod Walker wrote:
>> Sara is among the Tier 1 sites storing data critical to the ongoing
>> Atlas production. I`m sure it`s impossible to schedule downtime to
>> suit all VO's but might it be possible to devise an upgrade strategy
>> which keeps the services running. I think that this could work for
>> sites with sufficient flexability in terms of resources, i.e. the
>> critical tier 1's.
>>
>> Cheers,
>> Rod.
>>
>>
>> On Mon, 18 Apr 2005, Fokke Dijkstra wrote:
>>
>>
>>> Hi,
>>>
>>> Next week we will be migrating our site (SARA-LCG2) to
> LCG-2.4.0. At the same time we will also switch the OS to
> Scientific Linux. Together this forms a rather drastic change.
>>>
>>> We are also running an RLS server on our site, which is
> used by a number of VOs. Since the RLS is not supported
> within LCG-2.4.0 we will leave it as it is. And upgrade to an
> LFC in the near future. This has, of course, to be discussed
> with the VOs first.
>>>
>>> In the meantime our site will be down for about a week,
> which is unacceptable for the RLS. I have therefore installed
> a BDII on the RLS as well that contains its information.
>>>
>>> My suggestion would be to have the RLS as a separate entry
> in the all-sites list, removing the dependency of the
> existence of the RLS endpoint information on the availability
> of the Computing Element.
>>> Is this a good idea?
>>>
>>> If yes, can someone add the following entry to the all-sites list:
>>> SARA-RLS ldap://rls.matrix.sara.nl:2170/mds-vo-name=sararls,o=grid
>>>
>>> Please notify me, because I will then have to remove the
> RLS entries from the BDII on our CE.
>>>
>>> Kind regards,
>>>
>>> Fokke Dijkstra
>>>
>>>
>>> --------
>>> Fokke Dijkstra
>>> High Performance Computing
>>> SARA - Reken- en Netwerkdiensten http://www.sara.nl
>>> Tel. +31 20 592 8004 Fax. +31 20 668 3167
>>>
>>>
>>
>>
>> --
>> Rod Walker +1 6042913051
--------
Fokke Dijkstra
High Performance Computing
SARA - Reken- en Netwerkdiensten http://www.sara.nl
Tel. +31 20 592 8004 Fax. +31 20 668 3167
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