Hi Jacek,
Running the current 50 nodes on the long term is not an option, they are
really old now and are located in special racks (IBM iDataplex)
requiring a dedicated cooling system which is also not maintained
anymore. The idea would be to set up a qserv platform on more recent or
even brand new hardware that would have more cores, memory and disk /
server.
I guess that it is important to have several distinct servers rather
than just 3 or 4 servers with many core inside ? Should they be
connected through 10 Gb/s links or is 1 Gb/s sufficient ? What is the
ideal amount of disk space per server / per core ...
Dominique
Le 24/09/2013 14:20, Jacek Becla a écrit :
> Dominique,
>
> We will discuss this Thursday and get back to you.
> My feeling is that something like 8-10 nodes might
> be the sweet spot if keeping 50 long term is not
> an option. What is the annual cost to keep all 50
> running? (assuming we just take out of service
> machines that die).
>
> Jacek
>
>
>
>
> On 09/23/2013 09:45 AM, Dominique Boutigny wrote:
>> Hi,
>>
>> Let me add to Rachid's mail that it would be very useful to get a
>> detailed description of both an ideal platform and a minimal one, I mean
>> the minimum under which the platform is not useful anymore.
>> Resources are limited and we will have to make choices.
>>
>> Best regards,
>>
>> Dominique
>>
>>
>>
>> Le 23/09/2013 03:03, Rachid Lemrani a écrit :
>>> Dear all,
>>>
>>> The term "permanently" is not really correct. It's rather temporary
>>> and short-term (to end of this year).
>>> We are dealing here with old machines that are/were not maintained.
>>> We expect a detailed description of the hardware needs for the qserv
>>> test platform for 2014.
>>> And our management/experts will evaluate the feasibility of the
>>> request for the long-term.
>>>
>>> Best regards,
>>> Rachid
>>>
>>>
>>> On 23 sept. 2013, at 10:06, Fabrice Jammes <[log in to unmask]>
>>> wrote:
>>>
>>>> Hello Daniel, Douglas, Jacek, and Serge,
>>>>
>>>> Good news ! CC-IN2P3 agree to keep 50 machines running permanently
>>>> for Qserv development purpose.
>>>> Here's two questions from Rachid Lemrani about these remaining
>>>> machines at CC-IN2P3 :
>>>>
>>>> - Do you havea preference on the set of machines to keep (in ccqserv
>>>> set {001 .. 320}), or can the CC-IN2P3 engineers choose it
>>>> themselves(depending on racks for example)?
>>>> - Do you still need the"first" installed qserv machines (ccqserv {01
>>>> .. 15})?Can it be stopped ?
>>>>
>>>> Thanks,
>>>>
>>>> Fabrice
>>
>
--
Dominique Boutigny - CNRS / CC-IN2P3
Now at SLAC National Accelerator Laboratory
Mail : [log in to unmask] - [log in to unmask]
Office : +1 650-926-5759 - Cellular : +1 774-232-0912
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