"new" requirement

[Terry Disz]

Well, yes, the datastoreclient does most of what is needed, in fact that
is what I am using, but in a private cvs copy I have. It does a fine job
so far. But on the mud yesterday you were arguing that this requirement
had not been addressed, was difficult, unreasonable, etc, so I figured I
had better email it in as you suggested.
 
 The problem is one we have all discussed many times:  we have a file or
files in the venue that we do not want to download in their entirety or
are too large to download in their entirety. So we need an interface to
allow us to read the file in part, or in whole, from the venue. I also
have the case where I am building files that are very large and would
like to deliver them directly to the venue instead of creating them
locally and then transferring them. 
 
Terry
 
 
 
-----Original Message-----
From: Ivan R. Judson [mailto:judson at mcs.anl.gov] 
Sent: Friday, August 22, 2003 6:53 AM
To: 'Terry Disz'; ag-dev at mcs.anl.gov
Subject: RE: "new" requirement
 
 
 
It's not clear to me the details of this requirement. It'd be really
helpful if you could elaborate with use cases (even simple ones). If
this is the complete requirement I believe it's already been fulfilled
by the DataStore Client API Bob checked in and documented with the
attached PDF.
 
It's described this way, in mail to ag-dev (which I notice you are
subscribed to):
 
Within DataStoreClient is a ftp-ish command line client interface to the

datastore. While useful on its own, it provides a set of examples of the

interface to the datastore. To try it out, just run DataStoreClient.py
at 
the command line
Notably, this module introduces methods that reutrn filehandles for
reading 
from and writing to the venue datastore. The current implementation does

this by simply downloading before read, and uploading after write.
However, 
they should simplify the use of a venue datastore when those are the 
natural operations (for instance, with them one could pickle directly to

and from venue datafiles).
Is that sufficient or are you asking for something more?  If you're
asking for something more, you'll have to provide more detailed
requirements. Otherwise, we'll consider this requirement fulfilled..
Cheers,
--Ivan
-----Original Message-----
From: owner-ag-dev at mcs.anl.gov [mailto:owner-ag-dev at mcs.anl.gov] On
Behalf Of Terry Disz
Sent: Thursday, August 21, 2003 4:35 PM
To: ag-dev at mcs.anl.gov
Subject: "new" requirement
I need to be able to write and retrieve directly to/from a venue.
 
Things like open, read, write.
 
Terry
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