 28 Aug 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies 
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Hello experts,
I have been writing a SC frontend for a powersupply. I have used the model
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 28 Aug 2019, Stefan Ritt, Forum, History plot problems for frontend with multiple indicies
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My first question would be why are you using several font-ends at all? That makes things more
complicated than needed. In the normal FE framework, you can define either several equipment
served by one frontend, or even one equipment linked to several devices. In the MEG experiment
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28 Aug 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Stefan,
thanks for you quick reply.
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28 Aug 2019, lcp, Forum, History plot problems for frontend with multiple indicies
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hi,
> > That makes things more
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16 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> it's probably better to run a multi-threaded setup, than individual frontends.
I recommend against using multiple threads if at all possible and unless absolutely required.
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16 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> My first question would be why are you using several font-ends at all? That makes things more
> complicated than needed. In the normal FE framework, you can define either several equipment
> served by one frontend, or even one equipment linked to several devices.
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29 Aug 2019, Ben Smith, Forum, History plot problems for frontend with multiple indicies
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Hi Nick,
I confirm that this issue appears when using the MIDAS history driver. The issue does not appear when using the MYSQL history driver.
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01 Sep 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Ben,
thanks for your reply. I can confirm that your suggested workaround does indeed
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16 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> thanks for your reply. I can confirm that your suggested workaround does indeed
> make the problem dissapear.
> I guess this issue hasn't been seen at T2K since we use MYSQL for the history.
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16 Sep 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Konstantin,
thanks for your reply.
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17 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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> [local:e666:S]History>ls -l /History/Events
> Key name Type #Val Size Last Opn Mode Value
> ---------------------------------------------------------------------------
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18 Sep 2019, Nick Hastings, Forum, History plot problems for frontend with multiple indicies
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Hi Konstantin,
> > [local:e666:S]History>ls -l /History/Events
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27 Sep 2019, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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We should fix this for midas-2019-10.
https://bitbucket.org/tmidas/midas/issues/193/confusion-in-history-event-ids
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24 Aug 2020, Konstantin Olchanski, Forum, History plot problems for frontend with multiple indicies
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This turned out to be a tricky problem. I am adding a warning about it in mlogger. This should go into midas-
2020-07. Closing bug #193. K.O.
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12 Aug 2020, Yan Liu, Suggestion, adding db_get_mode ti check access mode for keys
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Hello,
I am wondering if there is a function that checks the access mode for a key? I
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13 Aug 2020, Stefan Ritt, Suggestion, adding db_get_mode ti check access mode for keys
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> Hello,
>
> I am wondering if there is a function that checks the access mode for a key? I
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13 Aug 2020, Yan Liu, Suggestion, adding db_get_mode ti check access mode for keys
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Thank you!
Yan
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07 Aug 2020, Konstantin Olchanski, Info, update of MYSQL history documentation
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I updated the documentation for setting up a MYSQL (MariaDB) database for
recording MIDAS history: https://midas.triumf.ca/MidasWiki/index.php/History_System#Write_MYSQL-history_events
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15 Jul 2020, Stefan Ritt, Info, Minimal CMakeLists.txt for your midas front-end
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Since a few people asked me, here is a "minimal" CMakeLists.txt file for a user-written front-end
program "myfe":
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28 Jun 2020, Konstantin Olchanski, Info, Makefile update
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I reworked the MIDAS Makefile to simplify things and to remove redundancy with functions
provided by cmake.
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15 Jul 2020, Stefan Ritt, Info, Makefile update
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Please note that you can also compile midas in the standard cmake way with
$ mkdir build
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28 Jun 2020, Konstantin Olchanski, Info, mhttpd https support openssl -> mbedtls
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For password protection of midas web pages, https is required, good old http
with passwords transmitted in-the-clear is no longer considered secure. Latest
recommendation is to run mhttpd behind an industry-standard https proxy, for
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28 Jun 2020, Konstantin Olchanski, Info, mhttpd https support openssl -> mbedtls
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To add. Using https with either openssl or mbedtls requires obtaining an https certificate. This can be self-
signed, or signed by a higher authority, or issued by the "let's encrypt" project.
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24 Jun 2020, Stefan Ritt, Info, New image history system available
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I'm happy to report that the Corona Lockdown in Europe also had some positive side
effects: Finally I found time to implement an image history system in midas,
something I wanted to do since many years, but never found time for that.
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28 May 2020, Marius Koeppel, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hello everybody,
I am really appreciate the development of the new odb++ API. So I directly started to rewrite the code for the Mu3e DAQ system.
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28 May 2020, Stefan Ritt, Suggestion, ODB++ API - documantion updates and odb view after key creation
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> 2. When I create an ODB structure with the new API I do for example:
>
> midas::odb stream_settings = {
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30 May 2020, Stefan Ritt, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Marius, has the problem been fixed in meantime?
Stefan
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04 Jun 2020, Marius Koeppel, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Stefan,
your test program was only working for me after I changed the following lines inside the odbxx.cpp
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05 Jun 2020, Stefan Ritt, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Marius,
your fix is good. Thanks for digging out this deep-lying issue, which would have haunted us if we would not fix it.
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08 Jun 2020, Marius Koeppel, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Stefan,
I agree with your explanation about the size of BOOL and bool.
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16 Jun 2020, Marius Koeppel, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Stefan,
I played around with the code a bit more and I found out that if I do:
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23 Jun 2020, Stefan Ritt, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Marius,
thanks for your help, you identified the problematic location. I changed that to
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24 Jun 2020, Marius Koeppel, Suggestion, ODB++ API - documantion updates and odb view after key creation
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Hi Stefan,
now everything works well (Tested on: OpenSuse and Arch Linux) :)
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19 Jun 2020, Isaac Labrie-Boulay, Info, Building/running a Frontend Task
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To build a frontend task, the user code and system code are compiled and linked
together with the required libraries, by running a Makefile (e.g.
../midas/examples/experiment/Makefile in the MIDAS package).
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18 Jun 2020, Ruslan Podviianiuk, Forum, ODB key length
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Hello,
I have a question about length of the name of ODB key.
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18 Jun 2020, Stefan Ritt, Forum, ODB key length
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No. But if you need more than 32 characters, you do something wrong. The
information you want to put into the ODB key name should probably be stored in
another string key or so.
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15 Jun 2020, Isaac Labrie Boulay, Bug Report, Killing and ODB - Removed ODB client because process pid does not exists
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Hey everyone,
When I run mhttpd I get the following error message:
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15 Jun 2020, Martin Mueller, Bug Report, deprecated function stime()
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Hi
I had a problem with the compilation of midas after an OS update to the recent version of OpenSuse tumbleweed. The function stime() in system.cxx:3196 |
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15 Jun 2020, Stefan Ritt, Bug Report, deprecated function stime()
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The function stime() has been replaced by clock_settime() on Feb. 2020:
https://bitbucket.org/tmidas/midas/commits/c732120e7c68bbcdbbc6236c1fe894c401d9bbbd
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09 Jun 2020, Isaac Labrie Boulay, Info, Preparing the VME hardware - VME address jumpers.
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Hey folks,
I'm currently working on setting up a MIDAS experiment and I am following the
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10 Jun 2020, Konstantin Olchanski, Info, Preparing the VME hardware - VME address jumpers.
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Hi, if you are not using any VME hardware, then you have no VME address jumpers to
set. https://en.wikipedia.org/wiki/VMEbus
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12 Jun 2020, Isaac Labrie Boulay, Info, Preparing the VME hardware - VME address jumpers.
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> Hi, if you are not using any VME hardware, then you have no VME address jumpers to
> set. https://en.wikipedia.org/wiki/VMEbus
>
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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 |
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04 Jun 2020, Lars Martin, Bug Report, midasodb.cxx RBA appends instead of replacing
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I am on branch develop and use the tmfe frontends. I found that a bool vector
gets bigger every time I read it from the ODB.
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30 May 2020, Gennaro Tortone, Bug Report, wrong run number
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Hi,
I build MIDAS and ROOTANA using same tag (midas-2020-03-a, rootana-2020-03-a):
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30 May 2020, Thomas Lindner, Bug Report, wrong run number
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Hi,
I fixed this particular case, so that I now I get the run number correctly.
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30 May 2020, Gennaro Tortone, Bug Report, wrong run number
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Hi,
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03 Jun 2020, Konstantin Olchanski, Bug Report, wrong run number
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>
> But Konstantin will need to explain how this class is supposed to be used more generally.
>
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03 Jun 2020, Konstantin Olchanski, Bug Report, wrong run number
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> I build MIDAS and ROOTANA using same tag (midas-2020-03-a, rootana-2020-03-a):
>
> MVOdb::SetMidasStatus: Error: MIDAS db_get_value() at ODB path "//runinfo/Run
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03 Jun 2020, Gennaro Tortone, Bug Report, wrong run number
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> > I build MIDAS and ROOTANA using same tag (midas-2020-03-a, rootana-2020-03-a):
> >
> > MVOdb::SetMidasStatus: Error: MIDAS db_get_value() at ODB path "//runinfo/Run
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04 Jun 2020, Konstantin Olchanski, Bug Report, wrong run number
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> > You made a mistake somewhere.
>
> you are right !
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04 Jun 2020, Lukas Gerritzen, , stime() deprecated in glibc 2.31
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In glibc 2.31, the stime function was deprecated:
* The obsolete function stime is no longer available to newly linked
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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, 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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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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24 Apr 2020, Pintaudi Giorgio, Forum, API to read MIDAS format file
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Dear MIDAS people,
I need to borrow your wisdom for a bit.
I am developing a piece of software that should read the history data stored in a
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24 Apr 2020, Stefan Ritt, Forum, API to read MIDAS format file
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I guess all three options would work. I just tried mhist and it still works with the "FILE" history
mhist -e <equipment name> -v <variable name> -h 10
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24 Apr 2020, Pintaudi Giorgio, Forum, API to read MIDAS format file
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[quote="Stefan Ritt"]I guess all three options would work. I just tried mhist and it still works with the "FILE" history
mhist -e <equipment name> -v <variable name> -h 10
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24 Apr 2020, Stefan Ritt, Forum, API to read MIDAS format file
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[quote="Pintaudi Giorgio"]
Hypothetically which one between the two lends itself the better to being "batched"? I mean to be read and controlled by a program/routine. For example,
some programs give the option to have the output formatted in json, etc...[/quote]
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25 Apr 2020, Konstantin Olchanski, Forum, API to read MIDAS format file
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<p>[quote="Pintaudi Giorgio"]Dear MIDAS people, I need to borrow your
wisdom for a bit. I am developing a piece of software that should read the history data
stored in a [FONT=Times New Roman].midas[/FONT] file (MIDAS format) and integrate it
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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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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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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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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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22 May 2020, Thomas Lindner, Bug Report, More trouble with openssl on macos
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For the record, here's my report of difficulties getting mongoose to compile with macos. This is a similar
problem reported before, but with slightly different error messages. So I put them here for posterity.
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22 May 2020, Konstantin Olchanski, Bug Report, More trouble with openssl on macos
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> For the record, here's my report of difficulties getting mongoose to compile with macos.
> -- MIDAS: Found OpenSSL version 1.0.2s
> -- MIDAS: Found OpenSSL version 1.1.1g
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