Re: data rate

[Frederick Gray <fegray@berkeley.edu>]

On Fri, Dec 02, 2005 at 06:06:35PM -0600, Peter Kammel wrote:
> Dear friends,
> 
> Probably the simplest is to turn off the WFDs from time to time for
> now. And ask Tim et al, whether a WFD compression is realistic during
> this run.
>

Hi, Peter,

I'm looking at the rate problem now.  Lossless WFD compression of some sort 
is of course desirable (as we have for all the rest of our data stream!).
However, the data transfer limit seems to come from the number of
processes fighting over the data disk: FADC extraction and two lazyloggers 
working on different runs.  I have currently disabled the FADC extraction, 
which improves the situation somewhat.

-- Fred

-- Fred Gray / Visiting Postdoctoral Researcher                 --
-- Department of Physics / University of California, Berkeley   --
-- fegray@berkeley.edu / phone 510-642-2438 / fax 510-642-9811  --