 26 Jul 2013, Konstantin Olchanski, Bug Report, abort on buffer overflow in odb.c::merge_records()
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The odb.c function merge_records() has a fixed size array of 10000 bytes to handle the data and it
aborts with an assert() if passed data bigger than that. It is called from db_create_record() which
already allocates a data buffer of correct size for it's operations.
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22 Jul 2013, Konstantin Olchanski, Info, MidasWiki at TRIUMF
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We are happy to announce the creation of the MidasWiki at TRIUMF (https://midas.triumf.ca) as the
new location of MIDAS documentation, user instructions, examples, etc.
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 24 Jul 2013, Konstantin Olchanski, Info, MidasWiki at TRIUMF
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> We are happy to announce the creation of the MidasWiki at TRIUMF
> https://midas.triumf.ca
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22 Jul 2013, Konstantin Olchanski, Info, MIDAS source code converted from SVN to GIT
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The MIDAS source code repository was converted from SVN to GIT, hosted as bitbucket:
https://bitbucket.org/tmidas.
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22 Jul 2013, Stefan Ritt, Info, MIDAS source code converted from SVN to GIT
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Konstantin forgot to tell people outside of TRIUMF how to get the newest version of MIDAS. Here it is:
$ git clone https://bitbucket.org/tmidas/midas.git
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10 Jun 2013, Konstantin Olchanski, Forum, ladd00.triumf.ca https ssl certificate update, elogd update, relocation.
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The HTTPS SSL certificate on ladd00.triumf.ca has been updated. Same as the old
certificate, the new one is self-signed and your web browser may complain about
that and ask you to "save a security exception".
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07 May 2013, Konstantin Olchanski, Info, Updated: javascript custom page examples
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I updated the MIDAS javascript examples in examples/javascript1. All existing mhttpd.js functions are
now exampled. (yes).
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10 May 2013, Konstantin Olchanski, Info, Updated: javascript custom page examples
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> ODBCopy(path, format); -- no doc
Updated example of ODBCopy:
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10 May 2013, Konstantin Olchanski, Bug Fix, Fixed: crash if alarm "write elog message" is enabled
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If the MIDAS Alarm property "write elog message" is enabled, an uninitialized variable "tag" is passed to
el_submit() and depending on your luck, cause a crash. "tag" is supposed to be and is now a NUL-
terminated string. The only other use of el_submit() is in mhttpd.cxx and mserver.c, where it is called
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06 May 2013, Konstantin Olchanski, Info, TRIUMF MIDAS page moved to DAQWiki
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The MIDAS web page at TRIUMF (http://midas.triumf.ca) moved from the daq-plone site to the DAQWiki
(MediaWiki) site. Links were updated, checked and corrected:
https://www.triumf.info/wiki/DAQwiki/index.php/MIDAS
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06 May 2013, Konstantin Olchanski, Info, Recent-ish SVN changes at PSI
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A little while ago, PSI made some changes to the SVN hosting. The main SVN URL seems to remain the
same, but SVN viewer moved to a new URL (it seems a bit faster compared to the old viewer):
https://savannah.psi.ch/viewvc/meg_midas/trunk/
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30 Apr 2013, Konstantin Olchanski, Info, ROOT switched to GIT
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Latest news - the ROOT project switched from SVN to GIT.
Announcement:
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11 Apr 2013, Thorsten Lux, Forum, Persistent ipcrm error
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Hello,
I have a problem with our DAQ which is based on Midas. Until now, for about 3 years, it worked quite well but since I tried to restart data taking after |
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11 Apr 2013, Konstantin Olchanski, Forum, Persistent ipcrm error
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> [system.c:308:ss_shm_open,ERROR] Shared memory segment with key 0x4d008002 already exists,
please remove it manually: ipcrm -M 0x4d008002
> [midas.c:1950:cm_connect_experiment1,ERROR] cannot open database
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11 Apr 2013, Stefan Ritt, Forum, Persistent ipcrm error
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[quote="Thorsten Lux"]In addition now I cannot start anymore the mlogger from the web interface but only manually. However, I can stop it from the web interface.[/quote]
At least that one can be fixed easily. Each program has a certain command with which one can start it. This has to be put into the ODB under /Programs/<program>. |
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12 Apr 2013, Thorsten Lux, Forum, Persistent ipcrm error
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[quote="Stefan Ritt"][quote="Thorsten Lux"]In addition now I cannot start
anymore the mlogger from the web interface but only manually. However, I can
stop it from the web interface.[/quote]
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12 Apr 2013, Stefan Ritt, Forum, Persistent ipcrm error
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> Hi Stefan,
>
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12 Apr 2013, Thorsten Lux, Forum, Persistent ipcrm error
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>
> > Hi Stefan,
> >
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12 Apr 2013, Thorsten Lux, Forum, Persistent ipcrm error
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Hi,
it seems that I solved the problem in a quite brutal way.
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12 Apr 2013, Stefan Ritt, Forum, Persistent ipcrm error
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> [odb.c:6038:db_paste,ERROR] found string exceeding MAX_STRING_LENGTH
Ok, so here is what probably happened. Some user program wrote a long string into the ODB and somehow corrupted it. This corruption persists as long as |
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13 Feb 2013, Konstantin Olchanski, Info, Review of github and bitbucket
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I have done a review of github and bitbucket as candidates for hosting GIT repositories for collaborative
DAQ-type projects. Here is my impressions.
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14 Feb 2013, Stefan Ritt, Info, Review of github and bitbucket
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Let me add my five cents:
We use bitbucket now since two months at PSI, and are very happy with it.
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01 Apr 2013, Randolf Pohl, Info, Review of github and bitbucket
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And my 2ct:
Go for git!
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02 Apr 2013, Konstantin Olchanski, Info, Review of github and bitbucket
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Hi, thanks for your positive feedback. I have been using git for small private projects for a few years now
and I like it. It is similar to the old SCCS days - good version control without having to setup servers,
accounts, doodads, etc.
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02 Apr 2013, Randolf Pohl, Info, Review of github and bitbucket
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Hi Konstantin,
> > * No central repo. Have all the history with you on the train.
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03 Apr 2013, Stefan Ritt, Info, Review of github and bitbucket
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> * "git bisect" for finding which commit introduced a (reproducible) bug.
I did not know this command, so I read about it. This IS WONDERFUL! I had once (actually with MSCB) the case that a bug was introduced i the last 100
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03 Apr 2013, Randolf Pohl, Info, Review of github and bitbucket
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> > * "git bisect" for finding which commit introduced a (reproducible) bug.
>
> I did not know this command, so I read about it. This IS WONDERFUL! I had once (actually with MSCB) the case that a bug was introduced i the last 100 |
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08 Mar 2013, Konstantin Olchanski, Info, ODB /Experiment/MAX_EVENT_SIZE
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Somebody pointed out an error in the MIDAS documentation regarding maximum event size
supported by MIDAS and the MAX_EVENT_SIZE #define in midas.h.
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11 Feb 2013, Wes Gohn, Forum, send_tcp error
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I am getting a series of errors from MIDAS that I do not understand, so I hope
someone can help me figure this out.
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11 Feb 2013, Stefan Ritt, Forum, send_tcp error
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> I am getting a series of errors from MIDAS that I do not understand, so I hope
> someone can help me figure this out.
>
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11 Feb 2013, Wes Gohn, Forum, send_tcp error
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> > I am getting a series of errors from MIDAS that I do not understand, so I hope
> > someone can help me figure this out.
> >
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12 Feb 2013, Stefan Ritt, Forum, send_tcp error
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Ok, now the picture is clearer. I have however no idea what the real problem is. The number of concurrent programs in midas is 64 as defined in midas.h
(MAX_CLIENTS) so that should not be the problem. In our experiment we run 10 front-ends (but
on 10 different machines) without problems. Other experiments used 27 front-ends.
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19 Feb 2013, Wes Gohn, Forum, send_tcp error
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Thank you for the help. As it turns out, the problem was due to the fact that we were compiling MIDAS on our 64 bit backend machine, but one of the frontend |
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24 Jan 2013, Konstantin Olchanski, Info, Compression benchmarks
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In the DEAP experiment, the normal MIDAS mlogger gzip compression is not fast enough for some data
taking modes, so I am doing tests of other compression programs. Here is the results.
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06 Feb 2013, Stefan Ritt, Info, Compression benchmarks
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I redid the tests from Konstantin for our MEG experiment at PSI. The event structure is different, so it
is interesting how the two different experiments compare. We have an event size of 2.4 MB and a trigger
rate of ~10 Hz, so we produce a raw data rate of 24 MB/sec. A typical run contains 2000 events, so has a
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28 Jan 2013, Robert Pattie, Forum, analyzer cannot connect to the statistics database
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I've managed to put the analyzer into state where it cannot connect to the
statistics database. The error message suggests another analyzer is connected.
I've recompiled MIDAS and the user code, restarted the computer etc..., and the
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01 Feb 2013, Randolf Pohl, Forum, analyzer cannot connect to the statistics database
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The simplest thing is probably to delete all files .[A-Z]*.SHM in the odb directory (the
one you specified in /etc/exptab).
This wipes the ODB, shared memory and all the other obscure stuff, giving you a clean,
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01 Feb 2013, Stefan Ritt, Forum, analyzer cannot connect to the statistics database
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> The simplest thing is probably to delete all files .[A-Z]*.SHM in the odb directory (the
> one you specified in /etc/exptab).
> This wipes the ODB, shared memory and all the other obscure stuff, giving you a clean,
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09 Jan 2013, wenliang li, Bug Report, Outputting ADC and TDC data into ROOT tree with the MIDAS SVN Revision:5347.
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Dear Midas Experts
I am Wenliang Li, a graduate student from University of Regina. Our group have
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09 Jan 2013, Stefan Ritt, Bug Report, Outputting ADC and TDC data into ROOT tree with the MIDAS SVN Revision:5347.
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Dear Bill,
the Midas analyzer "mana.c" is currently not maintained. At PSI we use the ROME framework (which might be too complicated for a
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04 Jan 2013, Nabin Poudyal, Suggestion, how to start using midas
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Please, tell me how to choose a value of a "key" like DCM, pulser period,
presamples, upper thresholds to run a experiment? where can I find the related
informations? |
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14 Dec 2012, Robert Casperson, Bug Report, MIDAS does not function correctly on F17
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When building MIDAS on Fedora 17 64-bit, the default zlib 1.2.5 shared library
is linked to. When recording data, the "/Logger/Channels/*/Statistics/Bytes
written" value does not get set correctly beyond the first few seconds of the
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20 Dec 2012, Stefan Ritt, Bug Report, MIDAS does not function correctly on F17
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If is not so easy to get out of zlib how many bytes have been written actually. I used an undocumented function,
which breaks down on 64-bit systems.
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18 Dec 2012, xelap, Forum, midas installation on SL6.3
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I try to do make in zlib folder and got this
cc -O -o example example.o -L. -lz
/usr/bin/ld: errno: TLS definition in /lib/libc.so.6 section .tbss mismatches
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14 Dec 2012, Vinzenz Bildstein, Suggestion, Midas + Elog with SSL
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I've been trying to set up midas to create an automatic elog entry at the end of
each run and I've run into a problem. I've setup an elog on our server which
uses SSL and it seems that the melog provided by midas to create logbook entries
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14 Dec 2012, Stefan Ritt, Suggestion, Midas + Elog with SSL
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> I've been trying to set up midas to create an automatic elog entry at the end of
> each run and I've run into a problem. I've setup an elog on our server which
> uses SSL and it seems that the melog provided by midas to create logbook entries
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17 Dec 2012, Vinzenz Bildstein, Suggestion, Midas + Elog with SSL
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> > I've been trying to set up midas to create an automatic elog entry at the end of
> > each run and I've run into a problem. I've setup an elog on our server which
> > uses SSL and it seems that the melog provided by midas to create logbook entries
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