Using two or more computer systems that work together. It generally refers to multiple servers that are linked together in order to handle variable workloads or to provide continued operation in the event one fails. Each computer may be a multiprocessor system itself. For example, a cluster of four computers, each with four CPUs, would provide a total of 16 CPUs processing simultaneously.
Clustering
A cluster of servers provides fault tolerance and/or load balancing. If one server fails, one or more additional servers are still available. Load balancing distributes the workload over multiple systems.
Clustering
A cluster of servers provides fault tolerance and/or load balancing. If one server fails, one or more additional servers are still available. Load balancing distributes the workload over multiple systems.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Terracotta buys Quartz
- Open source Java clustering software developer Terracotta announced its intent to buy an open source job scheduler known as Quartz. The integration of Quartz into Terracotta's platform will ease high availability job scheduling and scaling applications to multiple nodes, the company said. Quartz is currently integrated into...
- Blog posts 2009-11-19
- NMath Stats 3.1 (Windows)
- NMath Stats contains a data table class with functions for computing descriptive statistics, such as mean, variance, standard deviation, percentile, median, quartiles, geometric mean, harmonic mean, RMS, kurtosis, skewness, and many more; PDF, CDF, inverse CDF, and random variable moments for a variety of probability distributions, including normal Gaussian, Poisson,...
- Software downloads 2009-11-17
- Understanding Enterprise 2.0 Tolerances & Scale
- We're at an interesting intersection in the collaboration world where projects both large and small tend to be discussed with the same terms. This can be very confusing to the lay person since it's hard to know what sort of scale is being described. ...
- Blog posts 2009-11-14
- Rackspace adds Windows Server support to its cloud
- That is pretty awesome. Just goes to show how viable of a platform Microsoft Windows really is. Its a very robust operating system and scales well.RE: Rackspace adds Windows Server support to its cloudI see 3 possibilities in this; which one do you think this is?1. RackSpace has received...
- Discussion threads 2009-11-12
- Yes, Red Hat Enterprise Virtualization 3.0 will run on Linux
- This solidifies my decisionI currently have a cluster of a dozen RHEL 5.3 Cluster Suite servers. They have been a nightmare to use, maintain, and keep working right. Red Hat's clustering software is horrendously buggy. I never have gotten virtualization to work properly with the whole mess.After...
- Discussion threads 2009-11-11
- Windows Server 2008 R2 finally gets its day in the sun
- I'd like to know more....about when respective updates to SBS and EBS solutions will be coming.EBS, SBSHi. stay tuned for the next post. you aren't going to like the non answer. MJEasy Migration from Windows Server would be greatThat would be the best feature!!!!Use RHEL or somethingPeople do not understand...
- Discussion threads 2009-11-09
- EMIC extends open source clustering to Tomcat, JBOSS, and JOnAS
- gsd MKV Convert for Mac RE: EMIC extends open source clustering to Tomcat, JBOSS, and JOnAS MKV Converter for Mac
- Discussion threads 2009-11-03
- Amazon launches relational database service: Think MySQL in the cloud
- Three reasons this is a bad paradigm...Security, security and...let's see, what was that other thing...oh yeah, security. The comment "enterprise customers are likely to take their time moving sensitive data into Amazon?s RDS effort" should be nominated for the understatement of the year award. What's more likely is...
- Discussion threads 2009-10-27
- R for Mac OS X 2.10.0 (Mac)
- R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of...
- Software downloads 2009-10-26
- KnowledgeMiner (yX) for Excel 2.0 (Mac)
- 2 data modeling applications, yX for Excel and KnowledgeMiner 6.0 both in one download. yX has 3 main differences from KnowledgeMiner. 1. yX works in Microsoft Excel and can export models back to Excel. 2. yX contains a subset of the features in KnowledgeMiner. 3. yX Is...
- Software downloads 2009-10-19
- Live Webcast: Deliver Continuous Data Protection
- Can you really afford any downtime in times like these? In today's tough economic and competitive climate, businesses and organizations need to protect themselves from unplanned downtime that affects their sales, service, customer satisfaction, employee productivity and reputation. Besides business continuity BC, they also need to have a plan and...
- Webcasts 2009-10-19
- Survey: After Sidekick Failure Would You Buy Cloud Services?
- NoNo I would not buy from them again, I don't need a scare of all my info being deleted.http://gizmoelectronics.blogspot.com/http://www.stophighcosts.comI will never trust the cloud.I will use the cloud but not if it means I have to forgo a local copy and not if the data is private. I like Office...
- Discussion threads 2009-10-15
- iDefrag 1.7.1 (Mac)
- Advanced Mac OS X disk defragmentation and optimization. Supports the very latest features of HFS+, including journaling, case sensitive filenames and adaptive hot file clustering (which means it won't mess-up the Hot Zone).
- Software downloads 2009-10-01
- Transportation Firm to Cut Power Costs by 33 Percent With Virtualization and Clustering
- After struggling with disparate IT technologies based on Red Hat Linux, EmpireCLS Worldwide Chauffeured Services decided to transform its infrastructure using Microsoft software and HP hardware. With its new environment based on Windows Server 2008 R2, EmpireCLS has cut support calls by 75 percent and increased IT administrators' productivity by...
- Case studies 2009-10-01
- Ability Mail Server 2.70 (Windows)
- Ability Mail Server is an advanced, secure, and high performing mail server. With support for all standard mail protocols, including SMTP, POP3, IMAP4, LDAP, and WebMail, the software can meet the needs of almost any business or home user. Ability Mail Server is fully scalable with support for unlimited users...
- Software downloads 2009-09-24
- Veritas Storage Foundation for Sybase ASE Cluster Edition
- Sybase and Symantec are working together to optimize Sybase's Virtualized Resource Management™ technology framework found in ASE Cluster Edition for Veritas Storage Foundation HA. The new solution delivers a truly integrated database and storage clustering solution providing administrative efficiency, higher availability and improved performance. Learn more in an on...
- Webcasts 2009-09-17
- Doing the VMworld Dance Summary
- I found VMworld to be an excellent opportunity to meet executives of both VMware and its partners. I'm hoping to stay in touch with these companies so that I can help you stay up to date as well. Here are a few general observations about what I...
- Blog posts 2009-09-03
- Waking up to the full extent of virtualization options
- While doing my morning expedition through the wilds of news sites, blogs and, of course, comic strip sites, I came across something by Laura McCabe, a partner at Hurwitz and Associates, titled "What is Virtualization, and Why Should You Care?" While Laura's comments are useful, she didn't try to present...
- Blog posts 2009-08-18
- Will all the good open source companies be acquired?
- Another one bites the dust. Add SpringSource to the expanding list of independent open source companies that have been gobbled up by proprietary software giants. Let's consider the growing list: IBM's purchase of Gluecode, Novell's purchase of SUSE, Citrix's XenSource deal, Nokia's Trolltech buy,...
- Blog posts 2009-08-12
- Clustering and Queue Replication
- This BorderWare Technology paper details the unique, native features and functionalities that support the multiple levels of redundancy available with the BorderWare Security Platform. The BorderWare Security Platform for Email Security is a set-and-forget, all-inclusive messaging appliance that is specifically designed for enterprises to centrally control, protect and manage both...
- White papers 2009-08-01
Neighboring Terms
Premier Vendor Content Whitepapers, webcasts & resources from our Power Center Sponsors
- Learn more about tools to grow your business
-
The Business Essentials Guide provides you useful tools and templates to help grow your business and save you time with automated shipping solutions.
- Save time with the UPS Business Essentials Guide
- The best support in the Linux business
-
If Linux is going to power your mission-critical applications, you'd better have the best support known to business. Novell was rated the top provider of Linux technical support.
- Learn more >>
- Reduce risk. Reduce complexity. Increase reliability.
-
A simplified IT environment isn't just less complex. It's also more reliable. Standardize on a single Linux platform with SUSE Linux Enterprise from Novell, and get the world's most interoperable Linux
- Learn more >>
- The more you simplify, the more you save
-
When you transition from your existing Red Hat environment to SUSE Linux Enterprise from Novell, you can recognize dramatic cost savings, perhaps as much 50%
- Learn more >>
SmartPlanet
- Thought-provoking progressive ideas on diverse topics that intersect with technology, business, and life, and matter to the world at large. Visit SmartPlanet
- More from IBM
-
- Can your business work smarter? Learn more about Lotus Symphony
- Learn how to work smarter and optimize cost using the IBM Smart SOA approach Download the eBook
- Smarter ways to make smarter products Read the brief from IBM
