[kepler-dev] RE: [seek-dev] Transfer huge data file in EcoGrid

[Jing Tao]

Hi, Bing:

No, client side doesn't need a grid-ftp server, it need to 
instantiate GridFtpClient object.

Yes, we should have sessionId as paramter for authentication.

Jing

On Fri, 17 Dec 2004, Bing Zhu wrote:

> Date: Fri, 17 Dec 2004 11:12:36 -0800
> From: Bing Zhu <bzhu at sdsc.edu>
> To: Jing Tao <tao at nceas.ucsb.edu>, kepler-dev at nceas.ucsb.edu,
>      seek-dev at ecoinformatics.org
> Subject: RE: [seek-dev] Transfer huge data file in EcoGrid
> 
> Jing,
> 
> It is not clear to me if we still require to install a grid-ftp server in
> client side.
> And also we need to have 'session ID' after we implemented authentication
> service.
> 
> Bing
> 
> 
> -----Original Message-----
> From: seek-dev-admin at ecoinformatics.org
> [mailto:seek-dev-admin at ecoinformatics.org]On Behalf Of Jing Tao
> Sent: Thursday, December 16, 2004 2:41 PM
> To: kepler-dev at nceas.ucsb.edu; seek-dev at ecoinformatics.org
> Subject: [seek-dev] Transfer huge data file in EcoGrid
> 
> 
> Hi, everyone:
> 
> It seems we haven't found a way to stream big data object from EcoGrid
> service to client machine directly.
> 
> Here is a hybrid approach which i am thinking to figure out this issue by
> use grid ftp.
> 
> Hybrid means this approach will need both client lib and web service. The
> main task will be taken in client side and web service will provide some
> info.
> 
> In client lib, we will created a method named "transfer" and it signature
> will be:
> 
> public void transfer(String host, int port, String docId, DataSink sink)
> 
> This method will initialize a GridFTPClient object(using host and port)
> and call a "extenedGet" method to get the remote file:
> extendedGet(String remoteFileName, long size, DataSink sink)
> 
> In order to get remoteFileName and file size, we need two web services in
> EcoGrid:
> String getFilePath(String docid)
> long   getFileSize(String docid)
> 
> The above two web service method will be called in "transfer" method
> before calling "extenedGet" in order to get remoteFileName and file size.
> 
> This approach is not a pure web service, client software(such as Kepler)
> should stick the ecogrid client lib. In ecogrid service, we also need to
> run a grid ftp server.
> 
> Any suggestion and comment will be appreciated.
> 
> Jing
> 
> 
> --
> Jing Tao
> National Center for Ecological
> Analysis and Synthesis (NCEAS)
> 735 State St. Suite 204
> Santa Barbara, CA 93101
> 
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> 

-- 
Jing Tao
National Center for Ecological
Analysis and Synthesis (NCEAS)
735 State St. Suite 204
Santa Barbara, CA 93101