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Jacek Becla> > Andy, IN2P3 is getting this cluster for free from Dell, > the decisions were made well many many month ago, by > Dell people. We didn't have many choices/options. > We are very grateful for the 1 TB size disks, there > are plenty of them! You got the point :) This is more of an arrangement than a technical choice. Cheers, > Jacek > > > On 01/16/2015 05:33 PM, Andrew Hanushevsky wrote: > >Hmmm, why are you going with 1TB disks? Certainly 2TB disks would be > >just as good and probably more cost effective. Frankly, I'd price out > >each size (1TB, 2TB, 3TB and even 4TB -- they should be all available > >now in the 2.5" form factor). > > > >Andy > > > >On Fri, 16 Jan 2015, Yvan Calas wrote: > > > >>Hi, > >> > >>>On 15 Jan 2015, at 00:16, Fabrice Jammes <[log in to unmask]> > >>>wrote: > >>> > >>>Here's what Qserv team would like to have on the cluster, in addition > >>>to what we have defined previously: > >>> > >>>- Scientific Linux on all node, in order to get C++11 support > >> > >>Do you need SL7 only because of C++11, or is there any other reason? > >>Is it possible to have full C++11 support on SL6 nodes actually? > >> > >>As I already told you, it might take time to install SL7 on servers at > >>CC-IN2P3 (probably 2 months or more). > >> > >>>- 10TB shared storage available for all nodes and able to support a > >>>large amount of io during data-loading > >> > >>The features of the new Dell machines are as follow: > >> > >>- DELL PowerEdge R620 > >> + 2 x Processors Intel Xeon E5-2603v2 1.80 Ghz 4 cores, 10 Mo cache, > >>6.4 GT/s , 80W > >> + RAM: 16 Go DDR-3 1600MHz (2x8Go) > >> + 10 x 1 TB disk Nearline SAS 6 Gbps 7200 Tpm 2,5" - hotplug > >> + 1 x RAID card H710p with 1 GB nvram > >> + 1 x 1 GbE with 4 ports Broadcom® 5720 Base-T card > >> + 1 x iDRAC 7 Enterprise card > >> + redundant power supply > >> > >>>and some questions: > >>> > >>>- what will be the disk architecture (which kind of RAID, or > >>>something else, or nothing?) > >> > >>Since there is 10TB on each server, we plan to configure them in > >>RAID-6 (2 parity disks - 7.4 TB available), or in RAID-5 (one parity > >>disk - 8.4TB available) in you need more space on each node. If you > >>are thinking of another better RAID configuration for qserv, please > >>let us know ;) > >> > >>Note that we plan to install the 25 first machines int the computing > >>center at the beginning of week 5 (26-27/01/2015). > >> > >>>- we don't know a lot about Puppet and would like to know which kind > >>>of feature it offers (system monitoring, service restart, ...)? > >> > >>qserv admins at CC-IN2P3 (mainly myself) will write a puppet module in > >>order to: > >> > >>- deploy the qserv software automatically, > >>- tune the OS and qserv parameters. > >> > >>Moreover, since the soft will run as qserv user (as it was the case > >>last year on the 300+ nodes), I guess that you will be able to restart > >>the service, change qserv configuration files if needed, etc. using sudo. > >> > >>The monitoring will be based on Nagios (probes to define and write) > >>and collectd/smurf mainly. However plots generated by smurf will be > >>only accessible from inside CC-IN2P3. If some extra monitoring is > >>needed, we will deploy it. > >> > >> > >>>Would it be possible to talk to a Puppet/monitoring expert when these > >>>kind of questions occurs? > >> > >>I am not an expert of puppet, but I can try to answer to all of your > >>questions ;) If I don't know the answer, I will ask to Mattieu, and if > >>really needed you can contact him directly. > >> > >>Cheers, > >> > >>Yvan > >> > >> > >>--- > >>Yvan Calas > >>CC-IN2P3 -- Storage Group > >>21 Avenue Pierre de Coubertin > >>CS70202 > >>F-69627 Villeurbanne Cedex > >>Tel: +33 4 72 69 41 73 > >> > >> > >>######################################################################## > >>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 > >> > > > >######################################################################## > >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 > -- Mattieu Puel Sysadmins team manager IN2P3 Computing Centre http://cc.in2p3.fr +33 (0)4 78 93 08 80 ######################################################################## 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