[GridSim-users] DataGrid packaga - replicating a file

[Jonathan M. <jon...@bs...>]

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Hi,

I am using the datagrid package and I have a doubt.

When a DataGridUser (or a DataGridResource) wants to replicate a file,
it first gets it from wherever it is, and then replicates it to
wherever the DataGridUser/DataGridResource wants.

But, this operation implies the movement of the file twice.

    1. importing the file where the action is originated ( File f <-
getFile)

- --- then a replica is done at the beginning of the replicateFile
method using f as a master replica

    2. exporting the replica to wherever we want to replicate it (the
real replication)


- From my point of view, this does not make sense if the resource where
the action is originated is not interested in such a file and it only
wants to replicate it from one site to another (so just a data
movement among the source and target should be done). Or even if we
want to create a local replica, datagrid package is making us to get
the file first and replicate it straight afterwards (which implies
that file data is moved twice locally).

Does anybody have an explanation? Am I missing anything?

Thank you very much,

          Jonathan




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Jonathan Martí Fraiz
Storage Systems Research Group  - Computer Sciences Department
Barcelona Supercomputing Center - Centro Nacional de Supercomputación
www   : http://www.bsc.es/StorageSystems
email : jonathan(dot)marti(at)bsc(dot)es
phone : (0034) 934054281
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