 23 Oct 2008, Konstantin Olchanski, Bug Report, strange output from "odbedit cleanup"
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When I run odbedit remotely (odbedit -h ladd09), the "cleanup" command unexpectedly produces the
output of the "sor" command (sure enough, there is a call to db_get_open_records() there), but when I run
it locally, I do not get this output (but db_get_open_records() is still called). Strange. K.O. |
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23 Oct 2008, Konstantin Olchanski, Bug Report, bm_wait_for_free_space never sleeps inside the mserver
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When mserver receives events from remote client, writes them into a data buffer and this data buffer
becomes 100% full, we see mserver go into 100% consumption.
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06 Nov 2008, Konstantin Olchanski, Info, midas elog outage
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Around Wednesday Noon, there was a power outage at triumf (loss of ups power in the triumf
computing center) and after rebooting ladd00, https/ssl access stopped working with a complaint
about mismatching server name and ssl certificate name. This configuration used to work, so one of the
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27 Nov 2008, Konstantin Olchanski, Bug Fix, Fix ss_file_size() on 32-bit Linux
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It turns out that on 32-bit Linux, ss_file_size() returns the wrong answer for
files bigger than 2 GB (4GB?). The Linux stat() system call returns an error
(which is ignored) and bogus file size data (returned to the caller).
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 27 Nov 2008, Konstantin Olchanski, Bug Report, lazylogger complains about zero-size files
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I now have a better understanding of this: lazylogger uses ss_file_size() to find
out if a file exists or not. This function used to return 0 (probably) for
non-existant files (there was no check for error status from stat() system call,
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27 Nov 2008, Konstantin Olchanski, Info, lazylogger updated
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lazylogger was updated to improve handling of the list of runs still on disk
(odb /Lazy/xxx/List).
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27 Nov 2008, Konstantin Olchanski, Info, Fixed mlogger crash, was Per-variable history implementation in the mlogger
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> revision 4142+4143 are minor fixes, refactoring (switch the code to use helper
> functions) and implementation of history for structured banks
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02 Dec 2008, Konstantin Olchanski, Bug Fix, Fix ss_file_size() on 32-bit Linux
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> > I now fixed this problem by using the stat64() system call for "#ifdef OS_LINUX".
> That does not work if _LARGEFILE64_SOURCE is not defined.
> #ifdef _LARGEFILE64_SOURE
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21 Dec 2008, Konstantin Olchanski, Bug Fix, mhttpd minor bug fixes and improvements
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Committed minor bug fixes and improvements to mhttpd:
1) when generating history plots, use type "double" instead of "float" because "float" does not have enough
significant digits to plot values of large integer numbers. For example, serial numbers of T2K FGD FEB
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01 Jan 2009, Konstantin Olchanski, Info, odb "hot link" magic explored
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Here are my notes on the MIDAS ODB "hot link" function. Perhaps others can find them useful.
Using db_open_record(key,function), the user can tell MIDAS to call the specified user function when
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01 Jan 2009, Konstantin Olchanski, Info, Custom page which executes custom function
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> How can I add a button at the top of the "Status" webpage which will show a
> page similar to the "CNAF" one after I click on it? and how can I make a
> custom page similar to "CNAF" which allow me to call some custom funtions? I
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14 Jan 2009, Konstantin Olchanski, Forum, mlogger problem
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> The problem was already fixed some time ago, so please update your version from the SVN
> revision (see https://midas.psi.ch/download.html for details).
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17 Jan 2009, Konstantin Olchanski, Info, mhttpd, mlogger updates
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mhttpd and mlogger have been updated with potentially troublesome changes.
Before using these latest versions, please make a backup of your ODB. This is
svn revisions 4434 (mhttpd.c) and 4435 (mlogger.c).
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18 Feb 2009, Konstantin Olchanski, Info, odbc sql history mlogger update
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> mhttpd and mlogger have been updated with potentially troublesome changes.
> These new features are now available:
> - a "feature complete" implementation of "history in an SQL database".
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07 May 2009, Konstantin Olchanski, Info, midas misc timeout fixes
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(catching up on recent changes from t2k and pienu)
Various timeout problems fixed:
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07 May 2009, Konstantin Olchanski, Info, RPC.SHM gyration
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When using remote midas clients with mserver, you may have noticed the zero-size .RPC.SHM files
these clients create in the directory where you run them. These files are associated with the semaphore
created by the midas rpc layer (rpc_call) to synchronize rpc calls between multiple threads. This
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07 May 2009, Konstantin Olchanski, Info, mhttpd now uses mtransition
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mhttpd function for starting and stopping runs now uses cm_transition(DETACH) which spawns an
external helper program called mtransition to handle the transition sequencing. This helps with the old
problem of looking at a blank screen for a long time if some frontends take a long time to process run
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07 May 2009, Konstantin Olchanski, Bug Fix, mhttpd "Names" length
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mhttpd did not like it when the equipment "Names" arrays had different length compared to the
corresponding "Variables" arrays. These limitations are now removed.
svn rev 4469
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07 May 2009, Konstantin Olchanski, Bug Fix, Fixed mlogger run start and stop
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Fixed problems with mlogger starting and stopping runs.
Basic difficulty was with the mlogger using ASYNC transitions, which did not implement proper
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07 May 2009, Konstantin Olchanski, Info, SQL history documentation
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Documentation for writing midas history data to SQL (mysql) is now documented in midas doxygen files
(make dox; firefox doxfiles/html/index.html). The corresponding logger and mhttpd code has been
committed for some time now and it is used in production environment by the t2k/nd280 slow controls
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