 02 May 2020, Konstantin Olchanski, Forum, Taking MIDAS beyond 64 clients
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> > >
> > > Does the community here have strong opinions about increasing the
> > > MAX_CLIENTS and MAX_RPC_CONNECTION limits?
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03 May 2020, Pintaudi Giorgio, Forum, API to read MIDAS format file
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> The format of .hst midas history files is pretty simple and mhdump.cxx is an easy to read
> illustration on how to read it from basic principles (without going through the midas library,
> which can be somewhat complicated). The newer "FILE" format for history is even simpler
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03 May 2020, Konstantin Olchanski, Forum, API to read MIDAS format file
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>
> - One is to convert to SQL format and then use a SQLite library to import the data in my
> application.
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03 May 2020, Stefan Ritt, Forum, API to read MIDAS format file 
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> PS some time ago, I don't remember if you or Stefan, recommended CLion as C++ IDE. I have tried it
> (together with PyCharm) and I must admit that it is really good. It took me years to configure Emacs
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04 May 2020, Pintaudi Giorgio, Forum, API to read MIDAS format file
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> (But note that back when I implemented the SQLITE history writer, sqlite database corruption
> recovery instructions were "delete the file, restore from backup". And indeed in every test
> experiment I tried, the sqlite history databases eventually corrupted themselves. You see
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 12 May 2020, Ruslan Podviianiuk, Forum, List of sequencer files
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Hello,
We are going to implement a list of sequencer files to allow users to select one
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13 May 2020, Stefan Ritt, Forum, List of sequencer files
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If you load a file into the sequencer from the web interface, you get a list of all files in that directory.
This basically gives you a list of possible sequencer files. It's even more powerful, since you can
create subdirectories and thus group the sequencer files. Attached an example from our
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18 May 2020, Ruslan Podviianiuk, Forum, List of sequencer files
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> If you load a file into the sequencer from the web interface, you get a list of all files in that directory.
> This basically gives you a list of possible sequencer files. It's even more powerful, since you can
> create subdirectories and thus group the sequencer files. Attached an example from our
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19 May 2020, Ruslan Podviianiuk, Forum, List of sequencer files
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> If you load a file into the sequencer from the web interface, you get a list of all files in that directory.
> This basically gives you a list of possible sequencer files. It's even more powerful, since you can
> create subdirectories and thus group the sequencer files. Attached an example from our
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20 May 2020, Konstantin Olchanski, Forum, List of sequencer files
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>
> We have a custom webpage and trying to get list of files from the custom webpage and need jrpc command to show it
> in custom page. Is there a jrpc command to get this file list?
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26 May 2020, Pintaudi Giorgio, Forum, API to read MIDAS format file
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Eventually, I have settled for the SQLite format.
I could convert the MIDAS history files .hst to SQLite
database .sqlite3 using the utility mh2sql.
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04 Jun 2020, Hisataka YOSHIDA, Forum, Template of slow control frontend
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I’m beginner of Midas, and trying to develop the slow control front-end with the latest Midas.
I found the scfe.cxx in the “example”, but not enough to refer to write the front-end for my own devices
because it contains only nulldevice and null bus driver case...
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04 Jun 2020, Pintaudi Giorgio, Forum, Template of slow control frontend
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> I’m beginner of Midas, and trying to develop the slow control front-end with the latest Midas.
> I found the scfe.cxx in the “example”, but not enough to refer to write the front-end for my own devices
> because it contains only nulldevice and null bus driver case...
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04 Jun 2020, Stefan Ritt, Forum, Template of slow control frontend
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> I’m beginner of Midas, and trying to develop the slow control front-end with the latest Midas.
> I found the scfe.cxx in the “example”, but not enough to refer to write the front-end for my own devices
> because it contains only nulldevice and null bus driver case...
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04 Jun 2020, Hisataka YOSHIDA, Forum, Template of slow control frontend
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Dear Stefan,
Thank you for you quick reply.
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04 Jun 2020, Hisataka YOSHIDA, Forum, Template of slow control frontend
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Dear Giorgio,
Thank you very much for your kind and quick reply!
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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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10 Jun 2020, Konstantin Olchanski, Forum, slow-control equipment crashes when running multi-threaded on a remote machine
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Yes, it is supposed to crash. On a remote frontend, cm_get_path() cannot be used
(we are on a different computer, all filesystems maybe no the same!) and is actually not set and
triggers a trap if something tries to use it. (this is the crash you see).
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10 Jun 2020, Stefan Ritt, Forum, slow-control equipment crashes when running multi-threaded on a remote machine
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Few comments:
- As KO write, we might need semaphores also on a remote front-end, in case several programs share the same hardware. So it should work and cm_get_path() |
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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 |