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Topic: Scalability


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In the News (Tue 18 Sep 18)

  
  Scalability - Wikipedia, the free encyclopedia
In telecommunications and software engineering, scalability is 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, a scalable online transaction processing system or database management system is one that can be upgraded to process more transactions by adding new processors, devices and storage, and which can be upgraded easily and transparently without shutting it down.
A routing protocol is considered scalable with respect to network size, if the size of the necessary routing table on each node grows as O(log N), where N is the number of nodes in the network.
en.wikipedia.org /wiki/Scalability   (590 words)

  
 Achieving Massive Scalability with SQL Server
In addition to not adding any benefit in performance or scalability, MSCS can take an embarrassing 1 to 5 minutes to transfer its resources to the backup server and complete the failover process, during which time the database is down.
A clever way to achieve scalability when certain parts of a client or server application only require read access to the database, is to point those applications to a copy of the database on a separate database server.
Scalability comes from each Access server in the cluster only processing a much smaller load of operations, which it is capable of, and backup and recovery exists on account of having multiple separate live copies of the data —- better than failover.
www.sql-server-performance.com /dk_massive_scalability.asp   (1873 words)

  
 PHP Scales - O'Reilly ONLamp Blog
Scalability means “How well a solution to some problem will work when the size of the problem increases” (from Dictionary.com).
If you have read The PHP Scalability Myth or think that scalability is a measure of performance (or both), please take the time to read what Harry has written.
In terms of scalability, PHP has an advantage, but it loses a few features that some developers miss (which is why there are efforts to create application servers for PHP).
www.oreillynet.com /onlamp/blog/2004/07/php_scales.html   (2547 words)

  
 All Things Distributed: A Word on Scalability
Scalability is frequently used as a magic incantation to indicate that something is badly designed or broken.
If scalability is used in a positive sense it is in general to indicate a desired property as in “our platform needs good scalability”.
A service is said to be scalable if when we increase the resources in a system, it results in increased performance in a manner proportional to resources added.
www.allthingsdistributed.com /2006/03/a_word_on_scalability.html   (1329 words)

  
 Scalability
Scalability in MPEG-4 natural audio largely relies on difference encoding, either in time domain or, as in the case of AAC layers, of the spectral lines (frequency domain).
If, for instance a scalable coder using a CELP core coder would be used to encode musical material, the output of the CELP coder may be able to help the enhancement layers in terms of getting an easier signal to encode.
For scalability spanning a wider range of bitrates (from speech quality to CD quality), it is not recommended to run the core coders at the same sampling frequency as the enhancement layer coders.
www.chiariglione.org /MPEG/tutorials/papers/icj-mpeg4-si/09-natural_audio_paper/scalability.html   (1313 words)

  
 Designing Graphics Architectures Around Scalability and Communication   (Site not responding. Last check: 2007-10-17)
The basic unit of scalability is a single graphics pipeline, and up to 64 such units may be combined.
Pomegranate's scalability is achieved with a novel "sort-everywhere" architecture that distributes work in a balanced fashion at every stage of the pipeline, keeping the amount of work performed by each pipeline uniform as the system scales.
The use of one-to-one communication, instead of broadcast, as well as a carefully balanced distribution of work allows a scalable network based on high-speed point-to-point links to be used for communicating between the pipelines.
graphics.stanford.edu /papers/eldridge_thesis   (403 words)

  
 Interface Scalability -- CMS Watch   (Site not responding. Last check: 2007-10-17)
This type of scalability is undeniably critical when implementing a web content management system and certainly a topic worthy of much discussion.
Such bulk operation issues are a classic example of an interface scalability issue because they typically remain invisible to everyone until large amounts of data need to be loaded into the system.
It is very difficult to find a CMS on the market in the last 18-months that does not have at least simple workflow (which allows for currently assigned tasks to be visible) and permissions (which allows unnecessary features to be hidden).
www.cmswatch.com /Features/TopicWatch/FeaturedTopic/?feature_id=92   (2618 words)

  
 ONJava.com -- The PHP Scalability Myth   (Site not responding. Last check: 2007-10-17)
Scalability is mainly about the architecture of the application layer, and there is no one true panacea architecture that will work for all application architectures.
Scalability means buying more servers, and designing applications with dedicated servers in mind, one for one purpose, and another server for another purpose.
Scalability is a buzzword which seeks to place a spin on this impact and disquise the additional cost.
www.onjava.com /pub/a/onjava/2003/10/15/php_scalability.html   (12031 words)

  
 What is scalability? - a definition from Whatis.com - see also: scalable   (Site not responding. Last check: 2007-10-17)
Another example: In printing, scalable fonts are fonts that can be resized smaller or larger using software without losing quality.
For example, an application program would be scalable if it could be moved from a smaller to a larger operating system and take full advantage of the larger operating system in terms of performance (user response time and so forth) and the larger number of users that could be handled.
It is usually easier to have scalability upward rather than downward since developers often must make full use of a system's resources (for example, the amount of disk storage available) when an application is initially coded.
searchdatacenter.techtarget.com /sDefinition/0,,sid80_gci212940,00.html   (370 words)

  
 Digg PHP's Scalability and Performance - O'Reilly ONLamp Blog
My background is heavy in the architecture and development of highly scalable applications in Java, but I realized there were enough substantial differences between Java and PHP to cause me concern.
Scalability is the ability of the application to maintain good performance under heavy load with the addition of resources.
I don't doubt that PHP is scalable or capable of performing well at the 2 million hits per month range on a simple web application, but I do have concerns when it comes down to the available tool sets to handle enterprise level problems in PHP versus J2EE.
oreillynet.com /onlamp/blog/2006/04/digg_phps_scalability_and_perf.html   (3205 words)

  
 Scalability   (Site not responding. Last check: 2007-10-17)
Scalability is the capability to increase resources to yield a linear (ideally) increase in service capacity.
The key characteristic of a scalable application is that additional load only requires additional resources rather than extensive modification of the application itself.
Although raw performance makes a difference in determining the number of users that an application can support, scalability and performance are two separate entities.
msdn.microsoft.com /library/en-us/vsent7/html/vxconscalability.asp   (287 words)

  
 Welcome to the Scalability Community
Scalability is all about reducing the time-to-solution for your critical tasks.
Scalability involves making choices between investing in SMP hardware, upgrading I/O configurations, making use of networked machines, reorganizing your data, and how much you are willing to modify your application.
Achieving true scalability is a balancing act involving the choice of scalable hardware along with the right software that is specifically designed to leverage it.
support.sas.com /rnd/scalability   (324 words)

  
 LWN: Kernel Summit 2006: Scalability
Scalability work has transformed the Linux kernel over the past years.
If the initialization work could be parceled out, such that each processor (or, at least, one processor on each node) locates its own memory and devices, the boot process would be sped up considerably.
There are occasional scalability problems encountered on systems with more than 64 processors.
lwn.net /Articles/191929   (504 words)

  
 freshmeat.net: Tutorials - The Scalability of Ruby
I don't mean scalability in the performance sense, but in regards to how you can code simple Ruby macros to solve small problems and also use Ruby in its object oriented form to support very large or complex applications.
The scalability of a language is a critical factor in understanding how broad of a range of applications it can support.
A scalable language reduces the barriers to scaling an application from 10 lines to 15,000 lines.
freshmeat.net /articles/view/433   (4758 words)

  
 All Things Distributed: A Word on Scalability (via CobWeb/3.1 planetlab2.cs.virginia.edu)   (Site not responding. Last check: 2007-10-17)
This is often an indication that developers are running into situations where the architecture of their system limits their ability to grow their service.
An always-on service is said to be scalable if adding resources to facilitate redundancy does not result in a loss of performance.
I can have a perfectly scalable system but if no resource is maxed out before I add new resources, it is unlikely that I will see any performance improvement.
www.allthingsdistributed.com.cob-web.org:8888 /2006/03/a_word_on_scalability.html   (1339 words)

  
 Scott Sanders :: blog :: Scalability is not the only concern (via CobWeb/3.1 planetlab2.cs.virginia.edu)   (Site not responding. Last check: 2007-10-17)
When we were hit ’suddenly’ by scalability issues, we knew it would happen sometime and dealt with it accordingly.
Since we have finally chosen to go out as a web service, scalability to many thousands of users is a very important requirement, but only now.
And yes, scalability is a feature, but not one that should be the major focus in incubation.
dotnot.org.cob-web.org:8888 /blog/archives/2005/12/05/scalability-is-not-the-only-concern   (1342 words)

  
 InformationWeek.com
Scalability issues are encountered on all design levels.
Redundancy means having two elements that provide the same feature within the same system, one of which is designated as a backup to the first.
Companies need to bring redundancy and distributed computing into play to create scalable solutions--unfortunately, this is just a small piece of what's needed.
www.informationweek.com /805/scale.htm   (928 words)

  
 What is scalable? - A Word Definition From the Webopedia Computer Dictionary
For example, a scalable network system would be one that can start with just a few nodes but can easily expand to thousands of nodes.
Scalability can be a very important feature because it means that you can invest in a system with confidence you won't outgrow it.
For example, a font is said to be scalable if it can be represented in different sizes.
www.webopedia.com /TERM/s/scalable.html   (152 words)

  
 Scalability (IIS 6.0)   (Site not responding. Last check: 2007-10-17)
Scalability is the capability of a piece of hardware or software to easily expand to meet future computing needs.
Administrators can dramatically improve the scalability of their IIS server environment with careful planning and assessment of their infrastructure, which includes hardware, distributed applications, and custom components.
For information about monitoring IIS performance and scalability, including which counters to use, the tools available, and how to collect useful performance data, see Optimizing IIS 6.0 Performance.
www.microsoft.com /technet/prodtechnol/WindowsServer2003/Library/IIS/325ddb37-8c91-4fc6-9fbc-03c09a20dfdd.mspx   (135 words)

  
 ScalabilityExperts.com - Scalability Experts Releases SQL Server Upgrade Assistant
Scalability Experts has used Upgrade Assistant to accelerate upgrades to SQL Server 2005 while conducting application compatibility upgrade labs worldwide for partners participating in the Microsoft Touchdown program.
Scalability Experts is a SQL Server solution provider focused on delivering scalable solutions to medium business and enterprise customers and offers a full range of services for customers looking for assistance in upgrading to SQL Server 2005.
By combining our consulting methodologies, education services and our distinctive technologies, we are able to offer a unique “end to end scalable solution” that allows customers to dramatically increase productivity of their current and future SQL Server implementations.
www.scalabilityexperts.com /?action=article&ID=326   (276 words)

  
 epowiki: Scalability
Scalability is the ability to keep solving a problem as the size of the problem increases.
In this class of scalability problem you have a fixed set of resources yet you have to deal with ever increasing loads.
In this class of scalability problems you have the ability to add more resources to handle more work, in general this is called horizontal scaling.
www.possibility.com /epowiki/Wiki.jsp?page=Scalability   (536 words)

  
 Friendster goes PHP   (Site not responding. Last check: 2007-10-17)
Scalability of a PHP app is pushed down to the shared datastore, whatever that might be.
Or in other words, scalability is done through systems that have been architected to solve that very problem, not through the programming language.
Although language doesn't define scalability, Friendster has made it clear that a good PHP architecture is better than a bad JSP architecture.
troutgirl.com /blog/index.php?/archives/22_Friendster_goes_PHP.html   (13288 words)

  
 Scalable VPN Solution
In technology and product selection, scalability is the issue that differentiates large businesses from small ones.
Any solution that offers to save as much as 90% of a corporation’s long distance carrier charges will be considered, inevitably, for wider use in the corporation.
Ideally, a VPN should be made with scalable components that meet a variety of specific needs while integrating seamlessly into a company-wide communication framework.
www.vpn-technology.com /VPN_scalability.htm   (882 words)

  
 Scalability | Union Square Ventures: A New York Venture Capital Fund Focused on Early Stage & Startup Investing   (Site not responding. Last check: 2007-10-17)
Posted by evbart, August 11, 2006 11:27 AM It seems that many internet companies consider themselves "scalable", simply because they are web-enabled and thus able to server a wide geographic area.
This in naive in my opinion, because true scalability requires not just a website, but a business complete with the infrastructure (sales team, customer service...) necessary to serve diverse geographies...and many times by doing just that, and building out the business, you loose the efficiencies you once had in a confined goegraphy.
The same applies to scalability in numbers, as handling 10,000 users is infinitely easier and less complex than 1,000,000 users.
www.unionsquareventures.com /2006/08/scalability.html   (1173 words)

  
 SWAD-Europe Deliverable 10.1: Tools for Semantic Web Scalability and Storage: Survey of Free Software / Open Source RDF ...
This report is part of SWAD-Europe Work package 10: Tools for Scalability and Storage and addresses the scope, features and purpose of developer tools for providing semantic web data storage using existing systems that are licensed as Free Software or Open Source.
Using the network to fetch and store triples also impacts scalability, bringing in the issues of timeliness, caching and general problems from a distributed system that can fail or be delayed.
Scalability and performance were also required and thus the need for highly optimized structures for inference engines.
www.w3.org /2001/sw/Europe/reports/rdf_scalable_storage_report   (8309 words)

  
 ScalabilityExperts.com - Scalability Analysis   (Site not responding. Last check: 2007-10-17)
The scalability analysis recommendations are separated into short and long term.
Scalability Experts works with you to leverage the scalability analysis to provide the performance you want, balanced with the available time and resources.
Scalability Analysis can also provide specific focus on areas within the SQL Server ecosystem.
www.scalabilityexperts.com /default.asp?action=article&ID=87   (185 words)

  
 Confirma - Computer Aided Detection for MRI   (Site not responding. Last check: 2007-10-17)
CADstream is scalable and can be customized to fit any workflow and economic scenario.
Scalability is based on your site's equipment, volume and readers.
Scalability and flexibility enables CADstream to integrate into any breast MRI program.
www.confirma.com /products_cs_scalability.html   (116 words)

  
 NEON Systems, Inc. - Shadow® Advanced Scalability
The load balancing performed by Shadow Advanced Scalability is transparent to application platform suites.
When Shadow Advanced Scalability is implemented, Shadow Server instances are automatically deployed on the z/OS images with the greatest available resources.
The VCF component of Shadow Advanced Scalability significantly increases the number of client connections possible.
www.neonsys.com /Shadow/shadow_advanced_Scalability.asp   (361 words)

  
 Scalable Business Intelligence and Reporting - Scalability Resource Center
A scalable BI architecture supports large numbers of users with minimal hardware investments and IT support.
While scalability doesn't sound glamorous, it has major implications for a business intelligence (BI) and reporting strategy.
If a BI system technically can't reach thousands of users inside the enterprise and beyond, it's impossible to deliver the kinds of high-value solutions that enable organizations to better motivate employees, renovate their business processes to reduce cost, and innovate to provide competitive advantage and improved responsiveness to customers and partners.
www.informationbuilders.com /solutions/scalability.html   (301 words)

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