I will leave the discussion of ordering to others of a more architectural orientation - since to me events (streaming or otherwise) seem inherently ordered by...
Great point about the Stanford Streams project - I referred to it since I David has frequently used it as the source of confusion around the term "Stream,"...
Hi David! I am currently working on approaches to join BAM with CEP and therefor I stumbled over your paper "Why BAM must use CEP" from 2004. There you state...
Hi Chris, Oops! I hope I didn't exactly say that! I didn't mean to imply that business processes have to be stupid and stay that way. I think the idea was...
I finally got around to reading the paper "The 8 Requirements of Real-Time Stream Processing" in the Dec 2005 SIGMOD record. That's by Stonebraker and a...
The Esper open-source engine for CEP and stream analysis applications has released version 0.8.0. Any comments or feature requests are always appreciated. ...
Dear All, We are group who has been working on a CEP prototype and are currently seeking Angel Funding. Is there a group of VCs or angel investors who are ...
Sure, There are plenty of applications that can use CEP/ESP. Simple applications like: "Get the pizza-orders and their area-codes after aggregating/holding ...
Esper has released it's 0.8.5 version with new support for grouping and aggregation, as below. Esper is an open-source event stream and complex event...
Hi Gene, I heard of a company that uses ILog with the Vitria BusinessWare. The new version of Vitria offers a better Java integration. Maybe you can take a...
Hi Gene, I don't know very well JRules, but i know that it is based on the famous Rete algorithm as all production rule engines. They're not ECA rules. I am...
I can think of IBM's AmiT (commercial) and open source 'rulecore' as 2 ECA products at the moment that can be very much used for event processing applications....
Hi, I have evaluated open source Esper, Coral8 and other stream-processing engines from stanford, berkeley along with ECA based models like IBM's AMiT and...
Hi Hans: We like to do as many use cases at Coral8 as we can, so I have taken yours. Thank you for writing it up and giving me the event generator. I have...
Hi Sudeep, Nice to see your post in CEP group.So whats going on.What is the status of ECE? Hows life going on? Kabhi kabhi hame bhi yaad kiya karo dost! ...
Comments about the comparison between ECA and stream-based: First ECA usually relates to a single events, thus if multiple events are processed, I am not sure...
... Correct. My intention is to compare 2 approaches to the CEP/ESP world. And how well I am able to do that I am not sure. I wanted to highlight the...
Gene, to add to the responses you have had, there is also a product "in the works" from the IBM Software Group/ Tivoli called Active Correlation Technology...
Sudeep, thanks for bringing this ESP / CEP topic up! This is a BIG topic. A real problem in this discussion is to differentiate between (1) the WHAT and (2)the...
Chiming in on the distinction between "and ECA based approach versus a stream-based approach." I agree with Opher; I don't think there is a difference....
Yes, Mark from Coral8 agrees. There are no two separate worlds, ECA-based and stream-based. We do deal with out-of-order event clouds every day. We use ...
Hi Mark, I have a question regarding the evaluation strategy in your example. Is the join just syntatic sugar, or do you really end-up performing several...
... But, this technical document might help: http://www.cse.uta.edu/research/publications/Downloads/CSE-2004-3.pdf I found 2 approaches to the ESP/CEP thing...
Hello Sudeep. It is true that historically in the database community there were two approaches, one the "active database" approach which had ECA rules, the ...
Hi Pedro, This is a really good question. Let's think of a simple pattern: Select A.id From Stream1 A, Stream1 B Matching [10 seconds: A, B] On A.id = B.id ...
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