[d2n-analysis-talk] 64-Bit Replays

[Brad Sawatzky]

On Wed, 18 May 2011, Diana Parno wrote:

> I have -- sort of -- been able to reproduce Brad's success with the 64- 
> bit replay. If I don't recompile the analyzer and libraries, and if I  
> keep the updated database he uses, I get a very high success rate;  
> however, plugging in the DB I used for the 32-bit replay gives the bad  
> old <10% success rate. It's unclear why this might be, but it's the  

I noted this too...  Not sure why either.

> Here's the confusing news:
> - The sizes of the resulting ROOT files are different. This needn't be  
> very surprising, but it's the 32-bit file that's larger (at 591M) than  
> the 64-bit file (at 562M). I'd expected the 64-bit file to be larger!  

I wouldn't worry about this too much.  The two root files were almost
certainly generated with different versions of ROOT.  One of the things
that has been under recent development is the tree layout and packing
algorithm.

The data comparisons you've done are (obviously) the important things,
and those seem to be in good shape.  <Phew>

-- Brad

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov