HRMs in PPDG (high level view)

HRM-COPY

HRM-GET

Replica

Coordinator

HRM

(performs writes)

HRM

(performs reads)

• Monitors files written into BNL’s HPSS

• Selects files to replicate

• Issues request_to_put for file (or many files)

LBNL

BNL

GridFTP GET (pull mode)

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