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Tiziana FerrariNetwork Metrics Requirements and Usage for WP11 Tiziana Ferrari

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Presentation on theme: "Tiziana FerrariNetwork Metrics Requirements and Usage for WP11 Tiziana Ferrari"— Presentation transcript:

1 Tiziana FerrariNetwork Metrics Requirements and Usage for WP11 Tiziana Ferrari Tiziana.Ferrari@cnaf.infn.it

2 Tiziana FerrariNetwork Metrics Requirements and Usage for WP12 Applicability examples Integration of network info into the scheduling policy: –To define the most suitable Storage Element for one or more Computing Elements Triggering of data transfers –To gather in a single Storage Element portions of data sets partioned among several Ses List of applications to be developed further…

3 Tiziana FerrariNetwork Metrics Requirements and Usage for WP13 Network information CloseSE attribute: –CloseSE = {(closeness 1, SE 1 ), …, (closeness n, SE n )} closeness(CE, SE) = max 0 { "@context": "http://schema.org", "@type": "ImageObject", "contentUrl": "http://images.slideplayer.com/2/619018/slides/slide_3.jpg", "name": "Tiziana FerrariNetwork Metrics Requirements and Usage for WP13 Network information CloseSE attribute: –CloseSE = {(closeness 1, SE 1 ), …, (closeness n, SE n )} closeness(CE, SE) = max 0

4 Tiziana FerrariNetwork Metrics Requirements and Usage for WP14 Closeness function Fig 1: alpha = 2Fig 2: alpha = 10

5 Tiziana FerrariNetwork Metrics Requirements and Usage for WP15 Triggering of data transfers Initial assumption: all the SEs in a given set SE list = (SE 1, SE 2, …, SE n ) are equally distant from a given CE Definitions: –Inter SE distance: D(SE i ) = 1 j n, j i closeness(SE i, SE j ) – I : data portion stored by each SE i –Optimization function: opt(SE i ) = min j D(SE j ) * i/ max where in [0,1] SE is the selected Storage Element for computing element CE iff: SE = SE i iff opt(SE i ) = min j D(SE j ) * i/ max


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