Author: Vikas Hazrati

Combining CEP with Grid Computing

Vikas HazratiArchitecture, Java, , ,

In the last few posts, we have talked about Complex Event Processing (CEP), have gone through a simple case of CEP and have also looked at Grid Computing with GridGain. In this post, we are going to see how you can integrate both the paradigms together. There are 2 ways to look the combination of CEP and Grid. 1) CEP does its job and passes Continue Reading

CEP with Esper

Vikas HazratiArchitecture, Java

In the last post we looked at the basics of Complex Event Processing (CEP). In this post we are going to give that a try using the community edition of Esper which is an open source event stream processing (ESP) and event correlation engine (CEP). Let us assume a simple scenario. Say you want to go from Foster City to Redwood city on US 101. Continue Reading

Complex Event Processing

Vikas HazratiArchitecture, Java, ,

In the last post, we saw the difference between a Rule Engine, Event Stream and Complex Event Processing. In this post, we would try to dig a bit deeper into what is CEP. There are a lot of events happening in the enterprise. If these events are routed through an intelligent system that can find the correlation between the events and then take proactive action Continue Reading

Comparing Event Processing and Rule Engines

Vikas HazratiArchitecture, , ,

Recently, there has been a lot of talk about CEP and the benefits that it can bring to the industry. CEP is the analysis of event data in real-time to generate immediate insight and enable instant response to changing conditions. Likewise, a seemingly similar concept is that of Business Rule Engines. These again work in enterprises and help in triggering actions on the basis of Continue Reading

Let Us Grid Compute

Vikas HazratiArchitecture, Java, , ,

Since early times oxen were used for heavy pulling. Sometimes the logs were huge and an oxen could not pull it. The smart people from the earlier times did not build a bigger ox. Instead they used two or three together. Simple, isn’t it? It is the same concept which has gone behind the use of multiple commodity hardware linked together to provide super processing Continue Reading

Role of an Agile Architect

Vikas HazratiAgile, Architecture, , ,

This post is a reproduction of my article which has been published on Agile Journal by the name The Shiny New Agile Architect. You can download the pdf here. Recently there has been a lot of talk on whether we need an Architect on agile teams or not. There have been never-ending discussions on various forums both inside organizations and out in the public questioning Continue Reading

Don’t Judge an Application by the Looks

Vikas HazratiAgile, Architecture, , ,

We have heard a lot of times that for the end user, the UI is the system. Well, in my view the answer is partially correct. Agreed that the UI gives a pleasant feeling and makes you stay on the site for  longer. But would you stay on the user cool looking site if the pages were taking 30 seconds to load? Probably not. The Continue Reading

What Does 99.99% Availability Mean?

Vikas HazratiArchitecture

Availability is defined by uptime. I.e. the time between failures. It is dependent upon Downtime and Recovery Time Downtime is the amount of time that the system is unavailable due to either failures or scheduled maintenance. Recovery time is the average time it takes to recover from failures. This includes time for detection, isolation and resolution. Hence to have high availability, you must have low Continue Reading

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