Cloud computing is transforming the way businesses think about and leverage technology. As a result, the general understanding of cloud computing has come a long way in a short time. However, there are still many misconceptions about what cloud computing is and what it can do for businesses that adopt this game-changing computing model.
In his General Session at the 12th International Cloud Expo, Gene Eun, Senior Director, Oracle Cloud at Oracle, will discuss and dispel some of the common myth...| By Paul Hohensee | Article Rating: |
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| March 2, 2009 08:35 AM EST | Reads: |
18,001 |
Faced with the demands of mission-critical applications, many enterprise developers have pushed the Java language and the Java Virtual Machine (JVM) to the limit. The most common issue seen in transactional environments is achieving predictable response time or latency – in other words, the time it takes the system to respond to a request or to move a transaction through the IT infrastructure. In such environments, Garbage Collection (GC) moves from being a valued feature to a major headache.
Developers respond in different ways to the dilemma of GC-induced pauses. For example, a developer working for a financial services firm could set up application environments with enough memory at the beginning of each trading day to avoid encountering GC until the markets close, while another developer could create hybrid systems with non-Java technology critical sections talking to a Java software infrastructure.
In cases like these, almost all developers believe they have a performance problem and think – “if the overall system were only 10 percent faster, we’d be fine.”
Sometimes they are correct. Sometimes you do need more transaction processing in a given amount of time and speeding up the entire system will help. In most cases, however, what you really want is to prioritize your important tasks and ensure that they’ll never get interrupted or delayed by lower priority tasks. This is where a real-time Java system can help; however, to make an intelligent choice between real-time and non-real-time Java system implementations, developers must first understand more about the sources of unpredictability.
The Real-Time Specification for Java
The Java community has long recognized the need for predictability, or the ability to meet time-based requirements, within Java software applications. The thinking was that a Java technology-based system could be built that would allow both real-time and non-real-time components of industrial control and robotics applications to coexist in the same program. Thus 10 years ago, the Real-Time Specification for Java (RTSJ) was born as JSR-001.
The RTSJ includes a host of features, such as priority scheduling and asynchronous event handling, specifically targeted at control applications, but the specification in its original form didn’t contemplate the use of GC by time-critical code. Instead it defined Immortal and Scoped memory areas in addition to the Java system heap. Using Immortal and Scoped memory requires some getting used to, so a general perception developed that the RTSJ has a steep learning curve and is difficult to use.
Published March 2, 2009 Reads 18,001
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More Stories By Paul Hohensee
Paul Hohensee is a senior staff engineer at Sun Microsystems where he is the Java Platform Standard Edition JVM Technical Lead. His primary focus is JVM performance along with hardware and platform support for Java and other dynamic languages. Earlier in his career he worked on dynamic binary translation as well as optimizing compilers and libraries for the first symmetric multiprocessors.
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OpenStack Cells is one of the most anticipated features in Grizzly, the seventh release of the open source software that offers more block storage options and scalability. It has been running in production at Rackspace for more than a year.
In his session at the 12th International Cloud Expo, Wayne Walls, OpenStack Developer Advocate at Rackspace Hosting, will discuss nova cells and how it is changing the way you design your cloud applications and infrastructure. He will explain how OpenStack ...
"Since Cloud Expo is running the week of June 10, we thought it'd be a great idea to schedule our Meetup this week. That way, if you have colleagues, friends, or family in town that week for the Expo, you can invite them to join you!" With those words, the OpenStack New York Meetup Group's organizer's launched a landing page this week where anyone interested can register for the June 12 evening event.
“Open source has always provided a number of benefits, including easing adoption costs, propagating a better understanding of the technology, and allowing for faster evolution and commercialization of products and services based on it,” noted Terry Woloszyn, Founder & CEO, Leeward Security Ltd., in this exclusive Q&A with Cloud Expo Conference Chair Jeremy Geelan. “This is clearly evident with the OpenStack and CloudStack,” Woloszyn continued, “and others that have been quickly commercialized as...
SYS-CON Events announced today that OpenStack will exhibit at SYS-CON's 12th International Cloud Expo, which will take place on June 10–13, 2013, at the Javits Center in New York City, New York. OpenStack software controls large pools of compute, storage, and networking resources throughout a datacenter, all managed by a dashboard that gives administrators control while empowering their users to provision resources through a web interface.
OpenStack powers some of the most widely-used SaaS app...
SYS-CON Events announced today that BUMI (Backup My Info!), the premium provider of managed online backup and recovery solutions for small to mid-sized businesses, will exhibit at SYS-CON's 12th International Cloud Expo, which will take place on June 10–13, 2013, at the Javits Center in New York City, New York.
Manhattan-based BUMI (Backup My Info!) is a premium managed service provider specializing in online data backup and recovery. Founded in 2002, the company's data backup and recovery serv...
SYS-CON Events announced today that nfina Technologies, a provider of highly reliable cloud server products, will exhibit at SYS-CON's 12th International Cloud Expo, which will take place on June 10–13, 2013, at the Javits Center in New York City, New York.
nfina Technologies develops, manufactures, and markets highly reliable cloud server products, designed to solve the most demanding data center requirements in mission-critical cloud applications. Nfina’s staff has decades of experience in co...
In his session at the 12th International Cloud Expo, Dave Eichorn, Global Data Center Practice Head at Zensar, will share a case study describing how a utility services company handled the migration of its Microsoft platform to the cloud. Challenged with the time-consuming task of opening operations out of temporary offices, this company struggled with the need to simultaneously access data that was accumulated from a vast amount of data-intensive jobs. Zensar migrated the company’s application ...
“Social, mobile, analytics and cloud can’t be looked at as distinct technology trends; they are facets of the same movement and an everyday reality for consumers and businesses alike,” said Craig Sowell, IBM VP of SmartCloud Marketing, in this exclusive Q&A with Cloud Expo Conference Chair Jeremy Geelan. “This means that businesses need to start looking at trends as one: cloud is the delivery, analytics is the unique insight, social is a shareable service, and mobile is the ubiquitous access.”
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