[Swift-devel] discussion for swift output file path

[Ben Clifford]

On Thu, 6 Nov 2008, Zhao Zhang wrote:

> I am working on integrate the Collective IO system and swift on BGP. Before
> that, for the purpose of put swift into production work,

It would be useful if the changes, if they're useful, end up in the 
production Swift SVN - keeping everyone's codebase fairly tightly 
converged seems a good thing to me.

Points 1 and 3 below seem more difficult, but point 2:

> 2. change wrapper.sh: copy files from local ramdisck to GPFS using dd           
> instead of cp,      straghtforward.                     

is easy to put in. Is there a measurable performance increase using dd 
rather than cp? And dd using default block size or different ones?

> 1. change vdl-int.k: create hierarchical directory in shared/,
> straightforward

> 3. change somewhere in swift to make swift know where the data is, the path of
> the output file in jobdir/shared/    unknown

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