Re: [GridSim-users] DataGrid packaga - replicating a file

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

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Thanks for your fast reply.

Srikumar Venugopal escribió:
> Hi Jonathan,
> 
>> - 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?
> 
> As far as I know, you can trigger third-party replication by using
> DataGridlets. You can pack files in DataGridlet using
> addRequiredFiles() call and the DataGridResource
> (SimpleReplicaManager.receiveDataGridlet()) will automatically fetch
> them from the RC if those files are not at the resource.

Yes, but the DataGridResource would fetch them as it was reading them remotely.
It won't create a local replica of these files.

I think that I'll have to implement this feature by myself. The idea is that
whenever a file is fetched remotely, a local replica of such a file is kept once
it is read.

Thank you very much,


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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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