Re: file position on tape

[Alex Sim <ASim@lbl.gov>]

Douglas Olson wrote:
> 
> Hi Henrik (et al),
> 
> Dave Z. and I spoke with John Riordan (and Ed and Razvan) yesterday
> about getting information of where files are on tape.
> The thing that looks like it should be easy to do is to
> get the list, for a class of service (COS), of
> filenames, tape number, and position (order) of file on tape.
> I was thinking that you could use this along with the
> list of files that go into the GC index to include the
> information about tape number and order on tape.
> Then it would be possible (conceptually) to include this
> tape information in the policy decisions about what
> order to retrieve files.

This tape information can be used, but not for MDC2... don't have much
time to include this one...

> Dave will be back at LBL on Thursday and can talk to you
> about it, and probably show you an example of a file that
> has the tape information.  If you recall, he got information
> like that about the files we used at the end of MDC1.
> Why don't you think about that and consider whether it
> is possible to use it in MDC2.
> 
> Thanks,
> Doug
> 

-- 
Alex Sim                        
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