Sequence of actions(detailed view)

SRM_GET (sourceURL=hpss.bnl.gov/xyz/file_x,

targetURL =hpss.lbnl.gov/uvw/file_y)

(6) Call_back_1: file_on_disk (diskURL)

(8) Call_back_2: file_on_tape (tapeURL)

SRM_GET (sourceURL=hpss.bnl.gov/xyz/file_x)

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)

File staged (BNL’s diskURL)

GridFTP GET (pull mode)

LBNL

BNL

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