 03 Mar 2007, Stefan Ritt, Forum, event builder scalability
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> It seems that there's no problem running MIDAS with event builder assembling
> data from ~10 front-ends. How about ~100? One possible solution is to have a
> multi-tiered architecture.
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15 Mar 2007, Stefan Ritt, Info, mhdump: a standalone MIDAS history dump utility
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> I hope people find this program useful. If you have any feedback (patches, bug
> reports, requests for improvements), please post them as replies to this forum
> message.
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 03 Apr 2007, Stefan Ritt, Info, Switch to Visual C++ 2005 under Windows
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I had to switch to Visual C++ 2005 under Windows. This required the upgrade of
all project files under \midas\nt\ and fixing a few warnings, since the new
compiler is more picky.
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03 Apr 2007, Stefan Ritt, Bug Fix, SIGABT of "mlogger" and possible fix
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[quote="Exaos Lee"]Version: svn 3658
Code: mlogger.c
Problem: After executation of "mlogger", a "SIGABT" appears.
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09 May 2007, Stefan Ritt, Forum, Splitting data transfer and control onto different networks
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Hi Carl,
so far I did not experience any problems of running odb&alarm on the same link as
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22 May 2007, Stefan Ritt, Bug Report, analyzer_init called by odb_load
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The reason to call analyzer_init in odb_load is the following:
Assume you run the analyzer offline, analyzing many files in series. Then assume
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22 May 2007, Stefan Ritt, Bug Report, analyzer_init called by odb_load
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> Thanks for the quick reply, Stefan.
>
> Please don't change anything in the code unless you find it really important.
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08 Jun 2007, Stefan Ritt, Suggestion, RFC- ACLs for midas rpc, mserver, mhttpd access
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First I have a general question: mserver is started through xinetd, and xinetd has
the options "only_from" and "no_access". This is equivalent to the tcp_wrapper
functionality. Why not using this? It's possible without changing anything in midas.
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08 Jun 2007, Stefan Ritt, Forum, crash when analyzing multiple runs offline
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Unfortunately I don't have time right now to debug the problem, but I could see
roughly what it could be. The analyzer crashes inside CloseRootOutputFile:
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10 Jun 2007, Stefan Ritt, Forum, crash when analyzing multiple runs offline
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> tree_struct.n_tree keeps counting up from run to run (in book_ttree). This should
> presumably not be the case, since CloseRootOutputFile() frees the trees at eor().
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11 Jun 2007, Stefan Ritt, Forum, crash when analyzing multiple runs offline
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> I have hunted down "my" segfault problem to the fact that I book histograms not
> in <module>_init, but in <module>_bor. I have to do so, because only in bor do I
> know which histograms to book, as this information comes from the ODB (booking
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02 Jul 2007, Stefan Ritt, Bug Fix, mscb, musbstd fixed on Linux, MacOS
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[quote="KO"]There supposed to be no changes to the Windows code, but I cannot test on Windows, so if somebody does and finds breakage, please let me know.[/quote]
I can confirm that revision 3713 still works under Windows. |
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13 Jul 2007, Stefan Ritt, Forum, Midas on a x86_64 - incompatible with x86_32
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> The biggest problem here is that making 32-bit ODB and 64-bit ODB compatible requires breaking one or
> the other (My proposed changes break the 64-bit version. Alternatively, one could add explicit padding
> to these data structures and break the 32-bit ODB).
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26 Jul 2007, Stefan Ritt, Info, Change of pointer type in mvmestd.h
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I had to change the pointer type of mvme_read and mvme_write to (void *) instead
to (mvme_locaddr_t *) to avoid warnings under 64-bit linux. Please adjust your
VME drivers if necessary.
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03 Sep 2007, Stefan Ritt, Bug Report, how to handle end of run?
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> I am having problems with handling the end-of-run situation in my midas
> frontend. I have a device that continuously sends data (over USB) and I read
> this data in my "read_event" function.
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06 Sep 2007, Stefan Ritt, Info, Introduction of MIDAS_MAX_EVENT_SIZE
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We had the problem that different experiments used different MAX_EVENT_SIZE
values (the MEG experiment actually 10 MB!). If each experiment changes the
value in midas.h and accidentally commits it, other experiments are affected.
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08 Oct 2007, Stefan Ritt, Bug Report, Error in data format- ending blocks on 32bit boundary x86_64
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> Hi,
> I found that midas banks can be given an extra 32 bits of zeros when
> trying to keep to 32bit boundary on my x86_64.
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11 Oct 2007, Stefan Ritt, Bug Report, _syscall0 not available on gcc 4.1.1
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Dear Stephan,
I am writting on behalf of the LiBeRACE collaboration
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11 Oct 2007, Stefan Ritt, Bug Report, _syscall0 not available on gcc 4.1.1
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> Dear Stephan,
>
> I am writting on behalf of the LiBeRACE collaboration
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17 Oct 2007, Stefan Ritt, Forum, Multi-core CPUs
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> I have this beautiful Intel Quadcore with fast disks, but MIDAS does obviously
> only make use of one CPU at a time. Has anyboy of you already done some work
> on making MIDAS parallel? Event-based data analysis should be the best
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