LISTSERV 16.5 - HPS-SOFTWARE Archives

Hello Jeremy,

Unfortunately none of experts here can be at the meeting tomorrow.
Hovanes is on vacation and Sergei has another commitments.

I looked through your presentation from last meeting and discussed it
with Sergei. It seems what you want to do with EXO is already exist here
at JLAB. Accelerator group has nice arxiver, mysql based, that will arxive
with 1 Hz frequency any EPICS accessible variable. We (Hall-B) has plans to
store our EPICS information on that arxiv. It will have everything
necessary
for browsing, displaying, accessing etc.
In addition, Ssergei will push some of run-critical EPICS stuff into
data stream
every 10 or 20 seconds (must be decided).

I am not against developing parallel arxivers, what I am trying to avoid
is to have DAQ and EPCS guys to have additional work to write the same
data into some unknown to them (and many of us) system.

Regards, Stepan

On 9/3/13 9:06 PM, McCormick, Jeremy I. wrote:

Yes, it would be great if they could attend, though I'm still not certain about this Thursday. Waiting to here back from the software group.

--Jeremy

-----Original Message-----

From: Stepan Stepanyan [mailto:[log in to unmask]]

Sent: Tuesday, September 03, 2013 6:06 PM

To: McCormick, Jeremy I.

Cc: [log in to unmask]; Sergey Boiarinov

Subject: Re: conditions db discussion

Hi Jeremy,

Thanks for the reply.

Sorry, I do not remember all the details of discussions at the last meeting, by I remember that it was discussed that both EPICS and DAQ will fill mysql DBs for time dependent run parameters.

Certainly Serei and Hovanes should be in this discussion, they are the ones who will export information to DBs.

Regards, Stepan

On 9/3/13 8:59 PM, McCormick, Jeremy I. wrote:

Hi,

This is covered by my conditions talk at the last workshop.

Basically, the system will need to store time dependent conditions across runs and make this data available to the reconstruction and other software.

Someone conversant with EPICS would be nice. I think probably Ryan Herbst is the only one here that knows much about it, but I doubt he has much idea how it is used at JLAB.

Inclusion of ECAL collaborators would be desireable too but I didn't know who the correct people were in that sub-group.

--Jeremy

-----Original Message-----

From: Stepan Stepanyan [mailto:[log in to unmask]]

Sent: Tuesday, September 03, 2013 5:56 PM

To: McCormick, Jeremy I.

Subject: Re: conditions db discussion

Jeremy,

Can you please explain exactly what DB are this discussion for.

I am trying to see if anyone from JLAB should be involved.

Thanks, Stepan

On 9/3/13 8:13 PM, McCormick, Jeremy I. wrote:

Hi,

We are trying to setup a ~20 minute discussion within Thursday's software meeting to talk about detailed requirements for a conditions db during the runs.

I am hoping at least the following people would be able to show up and contribute their knowledge and suggestions in this area:

Sho

Pelle

Tim Nelson

Ryan Herbst

Norman

Maurik

Is there anyone else who should definitely be a part of this?

Dima Onoprienko from SLAC computing will be there, as he has offered to work on this. Tony Johnson will probably also attend. They would like clear requirements as to what we need and what code or interfaces would need to be added, etc. in order to come up with a reasonable time estimate for the work.

If that meeting time is either fully booked with an agenda, or if the time is not good for most people, please float an alternative date/time when this could be discussed. Or it could happen at the SW meeting a week from Thursday. I think though that our software meeting is probably the best place for this, as the time is already reserved and most of the relevant parties would be in attendence anyways.

Thanks.

--Jeremy

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