Dear Folks, This is our (almost final) call for subscribers on Yahoo! CEP-Interest to become working participants in the Event Processing Technical Society...
Hi, StreamCruncher - as Alex rightly pointed out is Free but not Open Source. There's a difference. Open Source is "Free", but Free does not imply Open Source....
StreamCruncher 1.08 Beta is ready for download. Here is a list of fixes/enhancements that have gone into the releases since version 1.0. 1) Highest/Lowest...
Hi all, I'm currently trying to do research on event models used in various CEP and ESP solutions in order to create some kind of "comparable" fact sheet and ...
Hi Szabolcs, It would help if you would say what you mean by a "an event model". E.g., do you mean a definition of "event" or perhaps a definition of a space...
Hi David, I definitely agree with you about the ambiquitous meaning of "model" (i work on some semantic/math modelling, near a team working on MDA/MDE...
I've not seen any activity on the community outreach subgroup that was formed at the SF meeting and I am a part of that group. What is the organization, plan...
Hello Beth. According to analysts' predictions the topic of event processing is still in the early adopters phase, so I don't worry about being hot for a...
Dear David and Folks, Here is a link to a fairly recent survey paper on event-based systems. http://www.minema.di.fc.ul.pt/reports/MinemaEventsReport_final.pdf...
Dear Folks, I have been thinking about event stream processing (ESP), reviewing formal definitions of data stream processing (thanks to David for the pointer!)...
I would agree with Tim that this can mess up your performance. I would also add another more practical implementation issue that I feel is as important. It's...
Hello Marco and Tim (and everybody else). Performance in event processing is indeed a result of many factors - persistence for recoverability which exists in...
Hi all, Thank you for all the resource! ... My last post definitely lacked of specifying the term "event model". From my perspective an event model is settled...
Hi Tim Good point though you can also consider that an out-of-order "buffer" is acting as a new source of event for the system under benchmark. On steady ...
Helo all, it seems to me that the "out of order" issue is only meaningful for events emitted by sources using a synchronized clock because if events are...
I'm about to offer a "pie-in-the-sky" response, one that would likely not be useful any time soon. I've been reading material put out by Jennifer Widom and...
Hi Claudi! Great to hear from you! The issue of clock synchronization is interesting, but this problem is workable by NTP and other methods of network time...
Tim- I think you may be falling into the standard trap of conflating throughput and latency with "speed". "Speed" is a fairly amorphous concept, so I prefer to...
Hi Richard, Thank you for your thoughts. I agree, it is easy to mix the concepts of latency and processing speed; similar to discussions of network bandwidth...
Hi Tim, I'd still like to hear your view. Especially in light of the "throughput" and "latency" discussions in another thread. Thank you, Brian ... -- Brian...
Hi Richard, Sorry for the typo (was on the phone in a telecon) My reply / query should read: "In your opinion, is it possible for out-of-sequence events to...
Hi Brian! Hope you are doing well! What happened was this: The good folks putting together DEBS 2007 asked me if I would do a talk in Toronto and were kind...
Tim, so I have to confess that I'm still not completely clear what's meant by ESP. I have a general idea of the differences between various products, but I...
Hi Tim, Your title may be ambiguous. Is it your intention to discuss (a) what subset of CEP is needed to do event stream processing? Or are you discussing (b)...
Hans : two short comments to what you have written: 1. I agree with your classification of programming styles --- SQL extensions, rules and scripts. However...
... Hi Hans! Here are two links to articles that discuss CEP v. ESP. Together, ... What's the Difference Between ESP and CEP? 1st August 2006 by Dr. David...
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