 10 Mar 2004, Jan Wouters, , Creation of secondary Midas output file. 
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Dear Midas Team,
I have run into a problem with Midas and was wondering if you could explain what I
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04 Nov 2004, Jan Wouters, Forum, Frontend code and the ODB
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I would like to know whether all parameters used by the frontend code have to be in the "Experiment/
Run Parameters" section. This section can become big and difficult to maintain, because it is one single
big section of experim.h (EXP_PARAM_DEFINED). I have parameters the various frontends read at the
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14 Dec 2004, Jan Wouters, Forum, Frontend index
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What is the api call to determine the index of the frontend when specifying the
-i parameter during execution of the frontend? |
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16 Dec 2004, Jan Wouters, Forum, cm_msg
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Could someone please explain to me how cm_msg, cm_msg1, etc. all work. The
documentation is very terse.
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19 Nov 2021, Jacob Thorne, Forum, Sequencer error with ODB Inc
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Hi,
I am having problems with the midas sequencer, here is my code:
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23 Mar 2020, Ivo Schulthess, Forum, Save data to FTP
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Dear all
I try to save data to an FTP server but don't get any data on the server. Midas does not complain or message any error but also nothing gets saved. Does
somebody have experience with this? I use the following settings for the ODB mlogger channel settings: Type: FTP, Filename: server.com, 21, user, pw, ., |
 24 Mar 2020, Ivo Schulthess, Forum, Save data to FTP
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> > I try to save data to an FTP server but don't get any data on the server. Midas does not complain or message any error but also nothing gets saved.
Does somebody have experience with this? I use the following settings for the ODB mlogger channel settings: Type: FTP, Filename: server.com, 21, user,
pw, ., run%06d.mid, Format: MIDAS, Output: FILE. What would be the Output: FTP setting for? I tried this but it does not work at all.
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24 Mar 2020, Ivo Schulthess, Forum, Save data to FTP
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> Logging directly from the midas logger to FTP is a bit cumbersome. In case of delays during login etc. this can throttle the whole DAQ chain.
> What we use in our lab is to write to local disk, then use the lazylogger (https://midas.triumf.ca/MidasWiki/index.php/Lazylogger) to copy the
> local files to a remote FTP server. This way we de-couple data taking from backup, making the system much more swift.
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07 Apr 2020, Ivo Schulthess, Suggestion, Sequencer loop break
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I am using the Midas sequencer to run subsequent measurements in a loop, without
knowing how many iterations in advance. Therefore, I am using the "infinity"
option. Since I have other commands after the loop, it would be nice to have the
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23 Apr 2020, Ivo Schulthess, Suggestion, Sequencer loop break
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> You can do that with the "GOTO" statement, jumping to the first line after the loop.
>
> Here is a working example:
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10 Jun 2020, Ivo Schulthess, Forum, slow-control equipment crashes when running multi-threaded on a remote machine
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Dear all
To reduce the time needed by Midas between runs, we want to change some of our periodic equipment to multi-threaded slow-control equipment. To do that |
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12 Jun 2020, Ivo Schulthess, Forum, slow-control equipment crashes when running multi-threaded on a remote machine
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Thanks you two once again for the very fast answers. I tested the example on the local machine and it works perfectly fine. In the meantime I also created
two new drivers for our devices
and everything works with them, the improvement in time is significant and I will create drivers for all our devices where possible. If they are in a working |
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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Dear all
We just started our beam time at ILL and just found yesterday that for certain
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> > Dear all
> >
> > We just started our beam time at ILL and just found yesterday that for certain
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> Then I'm running out of ideas. Things I would check:
>
> - Are the file sizes about the same?
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> with "dump" I meant a true object dump like "hexdump -C run000001.mid". I produced a file with ADC0 and TDC0
> banks (that's the example from the distribution under exampels/experiments/frontend.cxx), and I get
>
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> Have you tried longer files? Maybe a few 100 MB or so. Maybe a buffer is not flushed correctly at the end of a run.
Yes, I did. This 7 KB of the data bank is about the limit. If we go only 1 KB higher it seems that we save all data. In
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11 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> It would be good to pin point there the data is lost. This is the sequence:
>
> frontend user code -> mfe.c code -> SYSTEM buffer -> mlogger -> disk
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23 Mar 2022, Ivo Schulthess, Bug Fix, fix for event buffer corruption in bm_flush_cache()
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Thanks for the investigation. Back in 2020, we had some issues of losing data between the system buffer and the logger writing them to disk (https://daq00.triumf.ca/elog-midas/Midas/1966).
This was polled equipment but we had a multithreaded FE running at the same time. Could this be related to the same problem?
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13 Nov 2023, Ivo Schulthess, Forum, mlogger does not HAVE_ROOT
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Good evening,
I am setting up Midas (v2.1) for a new experiment. We want to save the data in the ROOT format. We installed ROOT from source (v6.28/06), and ROOTSYS is |