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Data Handling Scheme for the Italian Ground Segment (IGS), as part of AMS-02 Ground Segment

(P.G. Rancoita)

• Functions of a “Regional Center” can be carried out by facilities localized in different physical places

• General scheme for the data handling of IGS -- for Data transfer from and to CERN facility -- transfer can involve both scientific and MC data

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AMS-02 Italian Ground Segment Scheme

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• The IGS provides data transfer for a 2nd copy of AMS-02 data and the MC production (and subsequent transfer and archiving) of about 20% of MC data

• It includes :• the Data Transfer Facility (DTF) at CERN• the Data Archiving (IGSDS) and MC

production (IGSMCPF) at the ASDC• the Data Transfer Management and Survey

Facility (DTMS) in Milano

AMS-02 Italian Ground Segment

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Infrastructure in Milano

• Dedicated computing room

• Additional&Independent air cond.

• Additional (>) 20 KW UPS System

• GARR connectivity 16 Mb/s (can be increased)

We are thus able to provide ~ 7days/7 24 hr/24 uptime...

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Milano Data Center...

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Data Handling R&D Being Milano responsible of developing and testing, incollaboration with AMS SW group, the Data Transfersystem relating IGS and DTF, in Milano we have (or weare going to have) prototypes of:

• Italian Data Transfer Facility, which will be located at CERN.

• IGS receiving Facility.

• Monitor& Survey Facility, which will be located in Milano

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Data Handling R&D All the machines for the 3 facilities will be similar

and equivalent (or better) to:

• AMD Athlon 1.4 GHz• 128 MB RAM• IDE/ATA-100 disks• 100 Mb/s dedicated LAN.

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Data Handling R&D Sw layout on them:

• RedHat 7.1• kernel 2.4.9-12• MySql 3.23• bbftp 2.1.2• OpenSsh 2.9p2

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Analysis Data Handling

For scientific data analyses, we are also setting up a facility, in which particle tracing in the magnetosphere is the most CPU intensive activity

It is made out of a 20 hosts Linux farm, with 1 masterServer and 19 diskless clients. Clients boot by means ofEtherboot and necessary SW is stored on an EPROMmounted on board of the Network card.

• AMD Athlon 1.2 GHz• 256 MB RAM• 100 Mb/s dedicated private LAN

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Analysis Facility R&D

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Linux farm

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Linux farm cont.

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Linux farm cont.

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AMS-02 Italian Ground Segment

• Next presentation (Matteo) about:

Data Transfer (and Handling) Tests performed and going on