 24 Mar 2022, Konstantin Olchanski, 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
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24 Mar 2022, Konstantin Olchanski, 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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24 Mar 2022, Konstantin Olchanski, Bug Report, data missing in runXXXXXX.mid
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> One idea: we should have a look at mlogger::close_channels().
> There the SYSTEM buffer is emptied through the cm_yield() call.
> Instrumenting this with some debugging code will enlighten us.
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24 Mar 2022, Konstantin Olchanski, Bug Fix, mhttpd bug fixed
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> As for the browser cache problem: This Chrome extension is your friend ...
for google chrome, it is easy, open the javascript debugger (left-click "inspect"),
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 29 Mar 2022, Konstantin Olchanski, Bug Fix, mdump can read lz4 and bz2 files now
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I converted mdump file i/o from older mdsupport library to newer midasio library
and it can now read .mid, .mid.gz, .mid.lz4 and .mid.bz2 files. Output should be
identical to what it printed before, if you see any differences, please report
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30 Mar 2022, Konstantin Olchanski, Bug Fix, erroneous removal of odb clients, fixed
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commit https://bitbucket.org/tmidas/midas/commits/b1fe21445109774be3f059c2124727b414abf835
made on 2022-02-21 fixed a serious bug in ODB.
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31 Mar 2022, Konstantin Olchanski, Bug Fix, "run stop" trouble in mlogger, fixed
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while debugging something else, I ran into a bit of trouble in mlogger.
I set the mlogger event limit to 100, and after reaching 100 events, mlogger
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04 Apr 2022, Konstantin Olchanski, Suggestion, Maximum ODB size
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> Anybody some idea what the maximum ODB size can be?
It turns out ODB size limit is hardwired on db_open_database() at 100 Mbytes.
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12 Apr 2022, Konstantin Olchanski, Info, ODB JSON support
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> > > > odbedit can now save ODB in JSON-formatted files.
> > encode NaN, Inf and -Inf as JSON string values "NaN", "Infinity" and "-Infinity". (Corresponding to the respective Javascript values).
> http://docs.oasis-open.org/odata/odata-json-format/v4.0/os/odata-json-format-v4.0-os.html
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13 Apr 2022, Konstantin Olchanski, Info, ODB JSON support
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> > Per xkcd, there is a new json standard "json5". In addition to other things, numeric
> > values NaN, +Infinity and -Infinity are encoded as literals NaN, Infinity and -Infinity (without quotes):
> > https://spec.json5.org/#numbers
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24 Apr 2022, Konstantin Olchanski, Bug Fix, mserver buffer overrun and crash
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There is a memory allocation bug in the mserver.
ALIGN8() was missing when receiving events from the event socket and data buffer
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30 Apr 2022, Konstantin Olchanski, Forum, S3 Object Storage
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> We are storing raw MIDAS files to S3 Object Storage, but MIDAS file are not
> optimised for readout from such kind of storage. There is any work around on
> evolution of midas raw output or, beyond simulated posix fs, to develop midas
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30 Apr 2022, Konstantin Olchanski, Info, added web pages for "show odb clients" and "show open records"
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for a long time, midas web pages have been missing the equivalent of odbedit
"scl" and "sor" to display current odb clients and current odb open records.
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01 May 2022, Konstantin Olchanski, Info, added web page for "mdump"
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added JSON RPC for bm_receive_event() and added a web page for "mdump".
the event dump is a hex dump for now.
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01 May 2022, Konstantin Olchanski, Info, added web page for "mdump"
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> added JSON RPC for bm_receive_event()
there is a number of problems with implementing bm_receive_event() as a RPC:
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01 May 2022, Konstantin Olchanski, Info, added web page for "mdump"
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> added a web page for "mdump".
missing functions:
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04 May 2022, Konstantin Olchanski, Bug Fix, mysql history update
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the code for writing midas history to mysql has been updated to work against
MYSQL 8.0.23 (CERN ALPHA-2):
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08 May 2022, Konstantin Olchanski, Info, RO_STOPPED with triggered events
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> If events are sent when a run is stopped, this leads to many unexpected results
I think we need to understand what these unexpected results are.
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08 May 2022, Konstantin Olchanski, Info, RO_STOPPED with triggered events
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> some old front-end are not running any more since they do use RO_ALWAYS together with
triggered events.
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13 May 2022, Konstantin Olchanski, Info, analysis of corner cases in event buffer write cache
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introduction:
to remember, bm_send_event() writes an event to the write cache, bm_flush_cache()
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