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| | PHP Scales |
 | | Scalability means "How well a solution to some problem will work when the size of the problem increases" (from Dictionary.com). | | | While it is true that language syntax is irrelevant, the environments in which languages typically operate can vary drastically, and this makes a big difference. | | | Perhaps these premature optimizations even hurt scalability and performance and needlessly complicate our applications. |
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http://www.oreillynet.com/pub/wlg/5155
(2899 words)
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| | MS SQL Server Scalability |
| | Scalable systems solve the upsizing problem by giving the designer a way to grow the network, servers, database, and applications by just adding more hardware. | | | Scalable computer systems can grow an application’s client base, data base, and throughput without application re-programming. | | | Since access to data is serialized by the lock or cache manager, the shared-disk cluster has some of the same scalability limitations as shared-memory SMP systems. |
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http://www.ctlcorp.com/support/sql/scalability.html
(8509 words)
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| | Propylon - CTO Articles - Why scalability hurts so much |
| | Another problem I have with complex scalability frameworks is the ease with which your architecture can be bent out of shape to fit the framework. | | | Even if the framework is a vendor neutral one, the reality is that your applications easily become tied to a particular implementation of the framework. | | | We see numerous examples of technologies where scalability certainly does not just happen of its own accord. |
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http://www.propylon.com/news/ctoarticles/Why_scalability_hurts_so_much_20021126.html
(670 words)
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| | Scalability |
| | The computer industry is buzzing over "scalability." Put simply, scalability is a measure of how well an operating system "scales" from small to large computers. | | | The ideas that fuel scalability are changing the computer industry. | | | For large projects you load blocks like "Symmetric Multi-Processing" where Linux can use many computers tied together over a network to create one, large super-computer. |
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http://www.monolithicdome.com/edcircle/scalability
(540 words)
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| | All Things Distributed: On the Scalability of Feeds & Aggregators |
| | First some history: My 'official' area of research is scalability and reliability in mission-critical distributed systems, work that I have been doing since the late 80's, mostly in collaboration with Ken Birman and Robbert van Renesse here at Cornell. | | | Advances in how users can specify what information they would like to see, will be enablers for scalability at the human level. |
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http://weblogs.cs.cornell.edu/AllThingsDistributed/archives/000436.html
(2309 words)
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| | InformationWeek.com |
| | In theory, distributed computing and redundancy are the two concepts behind scalable solutions. | | | Scalability issues are encountered on all design levels. | | | 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. |
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http://www.informationweek.com/805/scale.htm
(855 words)
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| | Truth and lies about Linux scalability |
| | Honeyman: In many cases, developers have identified algorithms and data structures in the Linux kernel that were appropriate for certain assumptions about hardware and workload but were outpaced by external developments such as the plummeting cost of memory and disk. | | | For example, the success of Beowulf clusters has demonstrated that Linux is highly scalable for applications whose computing needs can be partitioned into 'shared nothing' parallel systems, e.g., finite-element analysis, or password cracking. | | | Currently, LSP is working on the open-source Linux client and server for NFS version 4, which is in the new Linux 2.6 kernel. |
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http://searchopensource.techtarget.com/originalContent/0,289142,sid39_gci929250,00.html
(1046 words)
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| | Scalability - Wikipedia, the free encyclopedia |
| | Scalability is a highly significant issue in electronics systems, database, routers, networking, etc. and implies performance. | | | To scale horizontally or scale out, means to add more nodes to a system, such as adding a new computer to a clustered software application. | | | 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. |
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http://en.wikipedia.org/wiki/Scalability
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| | Scalability |
| | One is implemented in hardware, slow as molasses, but its virtually impossible to issue enough queries to significantly change the throughput of all of the queries. | | | When there are 5,000,000 a single computer is probably going to thrash itself into a crash. | | | Most of the existing systems out there have been so crippled by poor algorithms (N^2 or worse) and bad code that it really doesn't matter if the underlying architecture could scale. |
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http://www.oreillynet.com/cs/user/view/cs_msg/25759?page=last
(737 words)
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| | Scalability of Email Solutions by Ascentrix |
| | Software scalability - Contrary to conventional thinking, the most common cause of a lack of scalability in computer systems is poorly written software, not hardware. | | | OpenBSD operating system and the qmail, or enhancements and add-ons developed in house have been field tested for their performance, efficiency, and frugality in resource consumption. | | | The modularization strived in the Solutions for system construction, and the high degree of compartmentalization of functionalities and system operations, and elegant simplicity in the architecture all result in clean distinction of administration tasks. |
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http://www.ascentrix.com/scalability.html
(510 words)
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| | Interface Scalability -- CMS Watch |
| | Permissions can only get you so far in presenting the content you’re likely to need in a system, and there is often a substantial amount of hunting that must go on even with permissions-based filtering in place (especially for the power user). | | | With regard to the first problem, a workflow mechanism is an absolute requirement to provide structure and ensure that everyday users interact with the content management system efficiently. | | | You don’t want finding that one piece of content in your content management system to be the same frustrating, time-consuming process as looking for your keys. |
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http://www.cmswatch.com/Features/TopicWatch/FeaturedTopic?feature_id=92
(2650 words)
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| | CITI: Projects: Linux scalability: March/April 2000 Status Report |
| | We're continuing to work with vendors such as Sun and IBM on their Linux scalability issues. | | | Randy Appleton of Northern Michigan University will join the Linux Scalability Project for the next few months to further this effort with detailed benchmarks demonstrating areas where madvise and fadvise can be most effective. | | | The threads project has presented their semester-end report describing benchmarks and improvements to the Linux scheduler. |
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http://www.citi.umich.edu/projects/citi-netscape/status/mar-apr2000.html
(672 words)
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| | Amazon.com: Books: Visual Basic .Net Scalability Handbook |
| | This could mean more users, or the same level of users demanding more and more from your application. | | | Over the years I have learned, not without great effort, to come up with some good design patterns that are universal to most languages. | | | There are many books that show how to program in VB.Net but not many that indicate how you should architect your application for a large user base. |
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http://www.amazon.com/exec/obidos/tg/detail/-/1861007884?v=glance
(730 words)
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| | What is Scalability? |
| | See "Techniques for Creating Scalable and Highly Available Sites" to learn more about different hardware and software load management solutions. | | | See "Hardware planning" and "Techniques for Creating Scalable and Highly Available Sites" to learn about the ways you can do this. | | | Load management refers to the method by which simultaneous user requests are distributed and balanced among multiple servers (Web, CFS, DBMS, file, and search servers). |
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http://bluemax.com/Service/CFSTUDIODOCS/Help/administering_coldfusion_server/admin062.htm
(922 words)
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| | ACM Queue - The Scalability Problem - How does one design today's games for high-end and low-end PCs at the same time? |
| | Whereas each component in the system—chipset, memory, hard-drive, networking, sound card, and so forth—plays a role, the two pieces of the scalability challenge that are often the most significant are the processor and the graphics subsystem. | | | In addition, other combinations of processors and graphics hardware are quite common, and game developers have to devise solutions that can give each end user the best experience possible for that user's system configuration. | | | A game must be able to run on a low-end system usually dictated by the publisher's minimum system requirements, yet innovate in some way to garner the praises of reviewers and early buyers to spark sales. |
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http://www.acmqueue.com/modules.php?name=Content&pa=showpage&pid=118&page=1
(963 words)
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| | ScalabilityTestResults by Objective Wiki |
| | I've done some scalability tests and, for certain things, my toaster is 9000 times faster than my computer. | | | One the major advantages of an RDBMS (like Oracle anyway, I don't have much experience with others) is that it can figure out the most efficient way to join data from multiple tables together. | | | I'd be more interested to see some performance results with more complex queries. |
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http://www.prevayler.org/wiki.jsp?topic=ScalabilityTestResults
(261 words)
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| | GWD: Scalability Needs |
| | This example highlights the value of directing all collaboration requests to one of many hosts so that the load is balanced and evenly distributed. | | | For larger-scale website development, however, the use of GWD can be scaled and optimized by partitioning across multiple hosts. | | | As necessary, the more resource-intensive processes, such as the collaborative environment, can have entire hosts devoted to their processing. |
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http://www.sims.berkeley.edu/courses/is206/f98/GroupE/6_scalability.html
(792 words)
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| | Larry Osterman's WebLog : Concurrency, Part 8 - Concurrency for scalability |
| | But if your application is CPU bound (for example, a database server that spends most of its time traversing indexes in database), then the obvious solution is to throw more CPUs at the problem. | | | And that means that you don't ever want to let the NT scheduler context switch away from your thread for any other reason than your quantum expiring. | | | The first is that it means that optimally, your application would only have one runnable thread per CPU core at anytime. |
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http://blogs.msdn.com/larryosterman/archive/2005/02/28/381865.aspx
(2772 words)
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| | Linux Scalability Effort Homepage |
| | This project is a community based project for all developers interested increasing the scalability of Linux to meet these challenges. | | | This project is made up of several groups interested in using Linux on larger systems and to solve larger problems. | | | In some cases, it becomes too complex to study loading different parts of the OS (imagine studying memory loading along with disk elevator performance while swapping, or some such interacting subsystem analysis), so it might make more sense throwing simpler-to-understand, aka synthetic benchmarks at the system. |
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http://lse.sourceforge.net
(454 words)
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| | CITI: Projects: Linux scalability: Accept() scalability on Linux |
| | This unnecessary awakening is commonly referred to as a "thundering herd" problem and creates scalability problems for network server applications. | | | Finally, we will benchmark the solutions and give the results and description of the benchmark. | | | In addition, we identify candidate solutions and considerations to keep in mind. |
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http://www.citi.umich.edu/projects/linux-scalability/reports/accept.html
(2506 words)
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| | Larry Osterman's WebLog : Concurrency, Part 10 - How do you know if you've got a scalability issue? |
| | You've got a scalability problem related to your locks if the context switches/second is somewhere above 2000 or so. | | | You can see that if you have an MP machine - start up a single threaded CPU bound task and look at the task manager - both CPUs will be 50% utilized. | | | Your estimate of 2000 being too many - is that per thread? |
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http://blogs.msdn.com/larryosterman/archive/2005/03/03/384458.aspx
(2607 words)
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| | ONJava.com: The PHP Scalability Myth |
| | These are all reasonable issues, and should be covered whenever you are choosing the development platform for any large project. | | | BTW, this was between 2000 and 2001 using PHP3 and the early versions of PHP4. | | | I didn't use the PHP accelerator -- I wrote well-crafted SQL statements, optimized my DB, used persistent connections to the DB, optimized code and continued review of all code. |
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http://www.onjava.com/pub/a/onjava/2003/10/15/php_scalability.html
(10274 words)
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| | scalability - White Papers, Webcasts, Product Information and Research Reports on scalability |
| | Traditional NAS appliances suffer from inherent cost, performance limitations, limited scalability, closed hardware, proprietary software and expensive high availability. | | | Four distinct attributes of SAS make it uniquely suitable for achieving optimal enterprise storage rationalization: performance, compatibility, scalability and flexibility. | | | This document describes the results of a joint MicroStrategy and Sun Microsystems benchmark test that show the MicroStrategy Business Intelligence (BI) platform's capability to support very large user populations. |
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http://www.bitpipe.com/data/search?qg=VENDOR&Search.y=0&rq=1&Search.x=0&src=bp_srslt&cr=bpres&cp=bpres&nh=25&st=1&site=bp&qp=site_abbrev:bp&src=bp_srslt&qt=scalability
(1025 words)
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| | Scalability Story |
| | For example, one of the fundamental things a version control system must do is figure out if the user has made any modifications to their local copies of the files. | | | Customers with 5,000 developers tend to have a very different class of needs. | | | Some teams lock thousands of files even if they don't plan to edit them. |
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http://software.ericsink.com/articles/Crowd_Test.html
(2212 words)
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| | Scalability |
| | First, on the control path, since the AVES-aware DNS server can be replicated easily, DNS query processing should not present scalability problems. | | | Although our software can be extended easily to support this service model, it introduces several new problems. | | | Because AVES is optimized for deployment, its scalability is a key concern. |
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http://www.usenix.org/event/usenix01/full_papers/ng/ng_html/node22.html
(307 words)
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| | K. Scott Allen : Scalability Is Passé |
| | It’s easy to catch possible bottlenecks with syntactic analysis of an application: a cursor declaration in a SQL query, a static constructor in a class. | | | Follow some guidelines and work with the framework instead of against it, and you’ll have a decently scalable system. | | | It’s easy to set performance benchmarks and measure scalability with software. |
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http://odetocode.com/Blogs/scott/archive/2004/09/28/516.aspx
(520 words)
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| | EBPP Changes the Face of Scalability |
| | The data already has been stored, so it becomes a question of how to retrieve it quickly and efficiently, and then present it to the customer. | | | A solution needs to be able to add functionality without a drop in performance. | | | sk about billing software and one of the first adjectives a vendor uses is "scalable." It's an industry buzzword that stands out when it's not used. |
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http://www.phoneplusmag.com/articles/121feat2.html
(1600 words)
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| | DSstar: Sybase Customers Win Prizes in DB Scalability Program |
| | "We're honored to be the grand prize winner of Winter Corporation's Database Scalability Program for database size on NT," said Ric Elert, vice president of Engineering. | | | "The Winter Database Scalability Program has provided us with a forum to showcase some of our most leading edge implementations," said Deborah Harrington, director, Sybase Business Intelligence Division. | | | Our program applauds both the users and the vendors responsible for these ground-breaking implementations." |
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http://www.tgc.com/dsstar/01/0327/102856.html
(567 words)
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| | DB2 UDB wins the scalability battle against Oracle and Microsoft |
| | Federated scalability: Unlike Oracle and Microsoft, DB2 delivers optimized integration with heterogeneous database systems through WebSphere Information Integrator allowing integrated, real-time access to diverse data as if it were a single database, regardless of where it resides. | | | See why and read about the DB2 Integrated Cluster Environment for Linux. | | | For more information see the Solitaire White Paper: DB2 Performance on IBM eServer pSeries and xSeries. |
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http://www-3.ibm.com/software/data/highlights/scalability.html
(286 words)
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| | Welcome to the Scalability Community |
| | This presentation details the scalability that is now possible with several of the analytic procedures as a result of parallel threading. | | | The first scenario uses MP CONNECT in a grid environment. | | | SAS 9 is a complete and flexible solution to software scalability. |
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http://support.sas.com/rnd/scalability/papers
(1221 words)
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| | USENIX ;login: - NT Scalability III |
| | Let's see how this kind of simple model can be applied to estimating the scalability of real computer systems. | | | In his opening address [3], Gray never actually defined what he meant by scalability, but one wrong impression revolved around Microsoft's cluster strategy. | | | This can often be obtained from application developers doing pilot scalability studies or systems analysts who have been tracking upgrades on production systems. |
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http://www.usenix.org/publications/login/1998-6/nt.html
(1595 words)
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| | scalability Computer Encyclopedia Enterprise Resource Directory Complete Guide to Internet |
| | In this case, the average response time probably scales linearly with the number of clients, we say it has a {complexity} of O(N) ("order N") but there are problems with other complexities. | | | scalability Computer Encyclopedia Enterprise Resource Directory Complete Guide to Internet |
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http://jaysir.com/computer-encyclopedia/s/scalability-computer-terms.htm
(95 words)
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| | Print - Scalability Politics |
| | The dark side of scalability is that if the system goes down in a large enterprise environment, you can make a lot more people angry more quickly than in a small-system environment. | | | According to Jocelyne Attale, IBM's vice president of Windows NT Marketing, IBM asked to participate in Scalability Day, and Microsoft refused permission. | | | To be truly scalable, a system needs to be optimized for total throughput, recoverability, availability, and support. |
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http://www.windowsitpro.com/Articles/Print.cfm?ArticleID=472
(922 words)
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| | Report Casts Doubt on SQL Server 2005 Scalability |
| | SQL Server 2005 will likely be a dud at delivering high-performance computing, according to a new report from Forrester Research Inc. | | | Our software tools do it for you, reliably and efficiently. | | | TPC benchmarks are one of several criteria customers use to choose a high-end, scalable database, Yuhanna said. |
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http://www.eweek.com/article2/0,1759,1776014,00.asp
(1251 words)
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| | Kerio Technologies Inc. Kerio MailServer Scalable mail server |
| | Being designed for small and medium sized businesses, it is optimized to run on a single server. | | | To help combat increasing security threats, Kerio MailServer™ offers a wide range of features to keep email from being intercepted, infected by computer viruses, or sent as spam. | | | From the system standpoint, the scalability depends on the following: |
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http://www.kerio.com/kms_scalability.html
(426 words)
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| | IEEE Network Magazine - Special Issue on Scalability in Communication Networks |
| | For a network system, scalability is dependent on the hardware architecture, application software architecture, underlying operating system, size of the data, and its communication protocols. | | | The former need to design systems, which are scalable at the application level to be provisioned by the latter in service. | | | Scalability issues in the Internet & other IP based networks |
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http://www.comsoc.org/pubs/net/ntwrk/special/scn.html
(309 words)
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| | Scalability in a real-time kernel |
| | Rich abstractions make it possible to exploit the capability of higher-end hardware platforms, and the separation makes it possible that their software functionalities are available also on low-end platforms. | | | Scalability of operating system kernels is important especially for real-time systems. | | | We introduce the separation of abstractions into software functionalities and hardware resources and their implementation by a scalable kernel architecture. |
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http://csdl2.computer.org/persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/rtcsa/1997/8073/00/8073toc.xml&DOI=10.1109/RTCSA.1997.629171
(236 words)
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| | Improving .NET Application Performance and Scalability (PAG Documentation) |
| | This part provides a series of chapters that provide deep platform knowledge across the.NET Framework technologies. | | | This section contains How To articles that provide step-by-step procedures for key tasks. | | | Use these chapters to learn about the key performance and scalability considerations for the various.NET technologies, and to improve the efficiency of your code in these areas. |
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http://msdn.microsoft.com/library/en-us/dnpag/html/scalenet.asp?frame=true
(766 words)
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| | Articles by Dr. Neil Gunther |
| | This paper shows how to apply some of the scalability concepts introduced in the previous paper to the performance analysis of real computer systems. | | | In this paper we present an introductory analysis of throughput scalability for update-intensive workloads (such as measured by the TPC-C or TPC-W benchmarks) and how that scaling is limited by serialization effects in the software-hardware combination that comprises any platform. | | | Here, you will learn how to determine value of the parameters that control scalability. |
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http://www.teamquest.com/resources/gunther/index.shtml
(706 words)
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| | Linux: Comparing Scalability Between 2.4 And 2.6 |
| | I've seen a number of benchmarks measuring how fast it takes to do a number of tasks, or that show the asymptotic behavior of certain syscalls, but I haven't noticed many that showcase how additional CPUs affect a workload. | | | The benchmarks were only testing scalability based on the number of processes running for different numbers of CPUs. | | | Its important to note we're talking about two types of scalability here, CPU scalability (how parallel the kernel is), and algorithmic scalability (O(1), O(n) algorithms, etc). |
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http://kerneltrap.org/node/view/1745
(893 words)
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| | Professional PHP » Blog Archive » PHP Scalability and Performance |
| | Switching from scalability to performance, John Lim talks about his experiences optimizing PHP code using xdebug. | | | And it often leads to code that is slower and less scalable. | | | If PHP encourages moving concurrency management to the database, then application scalability is going to become a matter of database scalability. |
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http://www.procata.com/blog/archives/2004/06/30/php-scalability-and-perforamnce
(739 words)
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| | Improving Perf and Scalability - Beta 2 |
| | Its an excellent piece of work from the patterns and practices team and I encourage you to contribute to its development. | | | This is the kind of stuff that we need to come out of Microsoft for us Architects to do our job. | | | Hope this hasn't already been blogged about (I've been out of the loop for a bit), but the “Improving.Net Application Performance and Scalability” document has recently been released in tis Beta 2 form. |
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http://weblogs.asp.net/pglavich/archive/2004/01/18/59863.aspx
(171 words)
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| | Scalability |
| | For instance, EMC Documentum has repeatedly demonstrated that performance can be constantly raised by adding CPU capacity in a server system. | | | EMC Documentum provides a completely scalable content infrastructure, developed as a result of years of technology leadership within the most demanding customer environments. | | | Additionally, EMC Documentum customers can take advantage of EMC Documentum’s horizontal scalability by leveraging the combined performance of multiple server systems running EMC Documentum software in a cluster. |
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http://www.documentum.com/products/platform/scalability?uq=False
(565 words)
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| | NEON Systems, Inc. - Shadow® Advanced Scalability |
| | Load balancing component - transparently distributes work across multiple Shadow address spaces on the mainframe and provides support for IBM's WLM feature | | | The load balancing performed by Shadow Advanced Scalability is transparent to application platform suites. | | | The load balancing capability provided with Shadow Advanced Scalability is further enhanced by support for IBM's Workload Manager (WLM) feature. |
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http://www.neonsys.com/Shadow/shadow_advanced_Scalability.asp
(378 words)
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| | All Things Distributed: Once More: Polling does not Scale. |
| | The question is how much leeway there is -- what level of expertise can we expect from an aggregator/publisher developer? | | | Werner Vogels' weblog on building scalable and robust distributed systems. | | | The developers are going to follow standards, and if those standards are built within a framework that lends itself to scalable approaches, then it will evolve to become scalable. |
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http://weblogs.cs.cornell.edu/AllThingsDistributed/archives/000511.html
(829 words)
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| | Scalability and Very Large Database (VLDB) Resources |
| | See how real-world businesses use SQL Server to rapidly adapt to a constantly changing environment. | | | Planning is essential if you want to create a highly scalable and reliable database system. | | | These resources and tools will help you determine the real-world requirements for your data and introduce technologies that can help you build scalable and reliable database applications more rapidly and easily. |
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http://www.microsoft.com/sql/techinfo/administration/2000/scalability.mspx
(376 words)
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| | Intelligent Enterprise Magazine - Scalability Information Center |
| | A membership group for organizations or individuals interested in Windows HPC and.NET solutions, provides information, seminars, and training designed to help evaluate, deploy, and manage midrange to high-end Windows systems. | | | We analyze key trends in how organizations are meeting scalability challenges. | | | Contains general information and links on clustering and scalability. |
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http://www.intelligententerprise.com/info_centers/scalability
(580 words)
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| | Designing Graphics Architectures Around Scalability and Communication |
| | 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. | | | 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. | | | We describe a new parallel graphics architecture called "Pomegranate," which is designed around efficient and scalable communication. |
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http://graphics.stanford.edu/papers/eldridge_thesis
(403 words)
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| | Scalability? |
| | Not only do they want to take over the world, but they want to do so before their technology is even in a position to do so effectively. | | | In other words, it just didn't scale to the serve the demand. | | | Just a week or two after their famed "scalability day," Microsoft has been having serious problems with its web site. |
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http://www.interhack.net/people/cmcurtin/rants/scalability.html
(117 words)
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