Dominique 1 Gb/se is enough, we try hard to design the system such that network is not heavily used. What kind of machines are you typically buying? (how many cores?) 1 disk per core (or 1 per 2 cores if you are getting machines with many cores) would be useful. As to disk size, depends on the pricing. I'd go with low-priced disks, e.g. we care more about number of spindles than the actual size (all new disks are now reasonably sized...). Something like 8 cores, 8 x 1 or 2 TB disks, 16 GB RAM would be a decent (and probably super very expensive) start. More on Thursday.... Jacek On 09/24/2013 02:32 PM, Dominique Boutigny wrote: > 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 >>> >> > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1