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  • is 'the Internet', or 'the Grid', or 'Utility Computing' or 'the Information Superhighway', or any other buzz word you can think of for the latest re-branding of 'the Web' (if you are really cool call it 'Web 3.0'). However, this time around 'the Cloud' is associated with very large data centres that can provide computing resources on demand for granular costing (keep your meme cache on for some kind of 'green cloud' coming soon). What the Cloud really means is less financial responsibility for the developer who is usually thinking about code and not financial predictions or growth rates. In short, as your data or users increase the number of server boxes you need to keep the users clicks reacting fast can be purchased as you grow. There are other advantages to the Cloud but for the sake of bluntness 'the Cloud' in this report is a way for developers to get rid of the responsibility and time needed for predicting growth, aka "the cloud means no VC!". And please keep in mind that 'growth' is key to what repositories must do if they are to be successful in the Cloud.

  • David F. Flanders - Cite This Source - This Definition
  • Browse Related Terms:   AWS (Amazon Web Services),   cloudcenter,   PaaS (Platform as a Service),   roaming workloads,   SaaS (Software as a Service),   service,   SLA (Service Level Agreement),   The Stack

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third party transfers - permalink

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  • In the simplest terms, a third party transfer moves a file between two GridFTP servers.

    The following is a more detailed, programmatic description.

    In a third party transfer, there are three entities involved. The client, who will only orchestrate, but not actually take place in the data transfer, and two servers one of which will be sending data to the other. This scenario is common in Grid applications where you may wish to stage data from a data store somewhere to a supercomputer you have reserved. The commands are quite similar to the client/server transfer. However, now the client must establish two control channels, one to each server. He will then choose one to listen, and send it the PASV command. When it responds with the IP/port it is listening on, the client will send that IP/port as part of the PORT command to the other server. This will cause the second server to connect to the first server, rather than the client. To initiate the actual movement of the data, the client then sends the RETR "filename" command to the server that will read from disk and write to the network (the "sending" server) and will send the STOR "filename" command to the other server which will read from the network and write to the disk (the "receiving" server).

    See Also client/server transfer.


    Globus Toolkit - Cite This Source - This Definition
  • Browse Related Terms:   Client,   client/server transfer,   command/response,   control channel,   data channel,   dual channel protocol,   extended block mode (MODE E),   MODE command,   server,   stream mode (MODE S)

TLS (Transport Layer Security) - permalink

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trusted CAs directory - permalink

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