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Re: [linux_var] high performance linux workstation

To: talking@ml.linuxvar.it
Subject: Re: [linux_var] high performance linux workstation
From: Francesco De Gasperin <fdg@voo.it>
Date: Thu, 16 Jan 2014 11:36:32 +0100
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On 16/01/14 11:09, Bruno wrote:

Il 15/01/2014 17:14, Francesco De Gasperin ha scritto:

Principalmente per fare imaging
(http://en.wikipedia.org/wiki/Aperture_synthesis) di dati di
interferometri
(http://en.wikipedia.org/wiki/Astronomical_interferometer) radio
(http://en.wikipedia.org/wiki/Radio_astronomy) come LOFAR
(http://en.wikipedia.org/wiki/Lofar).


Fai subito pensare all' SRT recentemente inaugurato ...

http://www.focus.it/scienza/spazio/in-sardegna-il-radiotelescopio-piu-grande-d-europa_C12.aspx


Focus e' riuscito a toppare anche il titolo :P
http://en.wikipedia.org/wiki/Effelsberg_100-m_Radio_Telescope

l'SRT e' essenzialmente da usare stand-alone a differenza degliinterferometri (anche se e' pensato per poter essere collegato ad altritelescopi in giro per il mondo ed essere usato come un elemento di uninterferometro, ma non credo l'abbiano ancora fatto).

Dal punto di vista informatico l'interferometria radio e' abbastanzainteressante. LOFAR ad esempio genera 2.5 Gb/s di dati per stazione esono 45 stazioni sparse per l'europa i cui dati devono essere streammaticon fibre dedicate al correlatore in olanda che deve gestire 24/7 ~100Gb/s. E il correlatore era il sesto supercomputer al mondo per potenzadi calcolo nel 2005 (quando lo comprarono,http://www.top500.org/system/173989). Anche lo storage dei dati e' statoproblematico, ora sono stoccati ~4 PB (dopo solo 2 anni di attivita').Detto questo, io lo uso solo, (s)fortunatamente non ho avuto a che farecon la parte piu' tecnica!


ciao
rev

--
Francesco De Gasperin

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