HTTP session management is a function offered by Java Enterprise Edition
(JEE) application servers. It allows JEE applications to store state
information about a given user across many HTTP requests. The JEE
specification provides an API to store and retrieve information specific to
the given user. WebSphere application servers and other competing products,
provide session replication functionality. This is normally done either by
writing to a database or through memory-to-memory replication technology.
These approaches while extensively used today, have operational challenges
and cost implications. HTTP session replication enables for seamless session
recovery, in event of an application failure, but we currently do not have a
reliable, predictable and cost effective solution to handle session recovery
in event of a data center failure. Until now we have discourag... (more)
As the IT operations continue to evolve and transform the business towards
agility and adaptability to ever changing rules of marketplace, the
efficiency of any IT operation is of paramount significance. The phrase
‘time to market' has a completely new meaning in today's dynamic business
environment where the only constant is change. This rapidly changing
environment has lead the IT and business leaders alike to re-think the
‘procurement to provisioning' process with one goal in mind - Efficient use
of resources. These resources include IT assets such as hardware an... (more)
What is a cloud computing platform? Is it simply automated provisioning
systems coupled with a resource virtualization, where the workload is policy
driven, and resources over committed and any resource contention handled by
policy driven resolution? As it turns out technologies that provide
provisioning, virtualization and policy enforcement form the building blocks
of a true cloud computing platform, but not any one technology is a cloud
offering in and of it self. IBM’s CloudBurst family attempts to provide a
single cloud solution with an appliance form factor. This paper will... (more)
Fundamentals: How does WXS solve the Scalability problem?
In understanding the scalability challenge addressed by WebSphere eXtreme
Scale, let us first define and understand scalability.
Wikipedia defines scalability as a "desirable property of a system, a
network, or a process, which indicates its ability to either handle growing
amounts of work in a graceful manner, or to be readily enlarged. For example,
it can refer to the capability of a system to increase total throughput under
an increased load when resources (typically hardware) are added."
Day and day out, we see every technology vendor attempting to position
themselves in the cloud realm and struggling to find a niche in this 'cloudy'
1. Virtualization and Automation are the building blocks of the cloud
computing platform. They alone will not solve any problems.
2. Cloud computing is based on the premise that it is a new model that
accommodates a new services delivery and consumption model. Now the term
'service' is very elusive, and I think this is what it is exploited by every
vendor trying to find that 'fit'.
3. Without a vision and a set expe... (more)