[Halld-offline] Gluex event sizes in pythia MC

[Alexander Somov]

Hello Richard, all,

The HDgeant event size estimates are definitively very useful.

There was a kind of confusion during the meeting regarding the
event size in daq (I forgot who came up with this question);
i just want to clarify on this point once again:
- for the daq event size we consider hit multiplicities of
   events accepted by the level1 trigger and multiply these mult.
   by the number of bits needed to code the time/integral of
   f1tdc's and flash adc's (+ add headers). To get
   an average event size one needs to take a (rate) weighted
   sum of the em background and hadronic events. The number
   of bytes used to code hdgeant and coda records is
   different.

The event size is indeed dominated by the FDC.

Cheers,
        Alex



On Tue, 26 Oct 2010, Richard Jones wrote:

> Hello,
>
> As I pointed out during our Monday physics meeting, event sizes for pythia 
> minimum-bias samples are right now around 50kb.  I have made the event record 
> distributions, grouped by detector and type of information stored, and posted 
> them on the web page below.  The FDC is the largest contributor, at around 
> 75% of the total payload.
>
> http://zeus.phys.uconn.edu/halld/hdgeant/sizes-10-2010
>
> -Richard Jones
>
>