Feeds

ESP and CEP...what's the difference?

Patterns and exceptions

Top 5 reasons to deploy VMware with Tegile

Comment If you talk to some vendors you could be forgiven for thinking that ESP (event stream processing) and CEP (complex event processing) are one and the same.

Indeed, I have previously suggested that CEP is a misnomer because the events in event processing are actually quite simple entities. This is true, but it is not the whole truth.

A typical ESP application is one such as algorithmic trading (stock tick information comes in, you apply calculations and rules and decide on whether to buy or sell). That is, you have an event, a condition and an action. The event, in this case, is very simple. Similarly, RFID inputs are simple events.

However, CEP is about what we might call über-events or, more specifically, patterns of events. In fraud detection, for example, the fraud "event" may in fact be made up of a sequence of inter-related events which, while simple on an individual basis, are complex when combined. Further, the individual events that make up such a complex event may be spread out over time, so a CEP engine needs to be able to handle long running processes. Moreover, the sequence in which these events can appear may vary so CEP needs to be able to handle non-linear events.

To cut a long story short, CEP is a superset of ESP.

The fact that CEP handles processes raises another question: couldn't you do all of this using business process management (BPM) or, for that matter, a rules engine? No, actually you couldn't.

AptSoft, which is a CEP vendor, has a particularly good user story that illustrates why and where CEP works and BPM and rules engines don't. Its customer is an airport and its application is baggage handling (not baggage tracking, which is an RFID application).

Now, in essence, this is quite simple: luggage goes from baggage handling to a plane, or from a plane to a plane, or from a plane to baggage handling. Clearly you could model this using a BPM process. However, what you would be modelling is a perfect day. And we all know that airports don't have perfect days - planes are delayed all the time, the luggage ramp breaks down, whatever - so the key to baggage handling is dealing with exceptions. Further, the exceptions are always different and have to be managed in real-time, which is why you need a CEP engine that has been designed specifically for this sort of (or any similar) scenario.

Going back to our original discussion point, it is worth noting that AptSoft does not compete in the ESP market. It is confident that it could do, say, algorithmic trading but as there are various companies already addressing this market it feels it is better placed in focusing on truly complex environments where its technology gives it an edge.

Copyright © 2006, IT-Analysis.com

Remote control for virtualized desktops

More from The Register

next story
PEAK APPLE: iOS 8 is least popular Cupertino mobile OS in all of HUMAN HISTORY
'Nerd release' finally staggers past 50 per cent adoption
Microsoft to bake Skype into IE, without plugins
Redmond thinks the Object Real-Time Communications API for WebRTC is ready to roll
Microsoft promises Windows 10 will mean two-factor auth for all
Sneak peek at security features Redmond's baking into new OS
Mozilla: Spidermonkey ATE Apple's JavaScriptCore, THRASHED Google V8
Moz man claims the win on rivals' own benchmarks
Yes, Virginia, there IS a W3C HTML5 standard – as of now, that is
You asked for it! You begged for it! Then you gave up! And now it's HERE!
FTDI yanks chip-bricking driver from Windows Update, vows to fight on
Next driver to battle fake chips with 'non-invasive' methods
DEATH by PowerPoint: Microsoft warns of 0-day attack hidden in slides
Might put out patch in update, might chuck it out sooner
Ubuntu 14.10 tries pulling a Steve Ballmer on cloudy offerings
Oi, Windows, centOS and openSUSE – behave, we're all friends here
prev story

Whitepapers

Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.