[NeXus-committee] Next DECTRIS Summary

[Andy Gotz]

Hi Mark,

good summary of the needs which BTW are the same for more and more 
detectors in synchrotron radiation. If there is agreement on a common 
scheme we can implement it as part of our generic data acquisition 
library for 2D detectors (https://forge.epn-campus.eu/projects/lima) 
which supports a wide range of detectors and is being used in a number 
of SR facilities.

Armando is following this discussion closely for us.

Regards

Andy

On 01/18/2013 08:00 AM, Mark Koennecke wrote:
> I consider this still good NeXus. The trouble is that with DECTRIS we 
> need to compromise
> in order to cover a variety of problems:
> * The lack of parallel compressed writing in HDF-5
> * The slow compression algorithm in HDF-5
> * There is a demand to start DA during DAQ. The Dectris scheme allows 
> this. HDF-5 not really,
>    they are implementing SWMR now, Multi Writer, Multi Reader, MWMR, 
> is not even being
>    considered.
> * The need to write large amounts of data quickly. Their detector 
> delivers 5GB/sec. A value we neutron
>    people can only dream of. Even at SNS or ESS.
> * The impossibility for Dectris to ask their customers to provide 
> proper HW, like a parallel FS etc. They
>    can only control the computers they deliver with the detector.
>
> Regards, 


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