performance degradation

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A Framework for Measuring and Predicting the Impact of Routing Changes

Routing dynamics heavily influence Internet data plane performance. Existing studies only narrowly focused on a few destinations and did not consider the predictability of the impact of routing changes on performance metrics such as reachability. This paper proposes an efficient framework to capture coarse-grained but important performance degradation as a...

Tags: Performance, University Of Michigan, Performance Degradation, Performance Management, BGP, Human Resources, Workforce Management, Networking

White papers 2009-01-01

Applications will perform exactly as before in a virtual environment

I've been reviewing some of the points of discussion in recent conversations with Kusnetzky Group clients in recent posts. This post focuses on how virtualization impacts application performance. Some suppliers are downplaying the impact their technology has on application performance and yet adding another layer of software...

Tags: Software, Application, Monitor, Performance, Environment, Clustering, Application Performance, Clustering Monitor, Performance Degradation, Performance Management, Human Resources, Workforce Management, Dan Kusnetzky

Blog posts 2007-10-04

TCP-Planet: A Reliable Transport Protocol for InterPlaNetary Internet

The space exploration missions are crucial for acquisition of information about the space and the universe. The entire success of a mission is directly related to the satisfaction of its communications needs. For this goal, the challenges posed by the InterPlaNetary Internet need to be addressed. Current TCP protocols have...

Tags: Georgia Institute Of Technology, Internet, Performance, Performance Degradation, TCP, Space Exploration Mission, Tcp/Ip, Performance Management, Networking, Human Resources, Workforce Management

White papers 2007-01-01

A Symbol Estimation Scheme for Alamouti Coded OFDM Systems

In Alamouti coded OFDM systems, the simple decoding at the receiver relies on the assumption that the subchannels are flat fading, decoupled, and quasi-static so that each subchannel does not change over an Alamouti codeword period two consecutive OFDM symbol periods. When the channel is fast fading, however, these assumptions...

Tags: Performance, Performance Degradation, University Of Texas, OFDM, Performance Management, Wireless, Human Resources, Workforce Management

White papers 2006-06-20

Additional Resources

NetGear WNHDEB111 HD Gaming Wireless N Networking Kit

Editors' note: As the NetGear WNHDEB111 HD Gaming Wireless N Networking Kit is a gaming networking accessory, we didn't put it through the same testing process we use for wireless routers.While home wireless products continue to invade the marketplace, the demand for high-speed wireless performance increases. At this point,...

Tags: Routers & switches, Network technology, NETWORKING, Ethernet, Wi-Fi, Wireless and Mobility, Wi-Fi Protected Setup, Netgear Inc., router, wireless, network

Product reviews 2009-11-05

Application performance can't be maximized in the dark

When optimizing and managing how applications perform ? from the eyes of the user ? IT teams need light shed onto the actual trouble spots says OpTier's Motti Tal. Commentary - Sometimes, when end users experience application trouble, response times degrade slowly. Other times, applications seem to turn off...

Tags: Performance, Monitoring, Application Performance, Response Time, Storage, Hardware, applications, database, Motti Tal OpTier, Special to ZDNet, Motti Tal OpTier, Special to ZDNet

News items 2009-10-20

Bose SoundDock 10

Believe it or not, iPod speakers were once rare objects--and Bose's SoundDock was one of the first to hit the market back in 2004. Since then, the company has followed up with the SoundDock II ($299) and the SoundDock Portable ($399), even as the iPod speaker category has become completely...

Tags: Corporate communications, Digital music, Digital media, Smart phones, Bose, Apple iPod, video

Product reviews 2009-10-02

WavPack 4.60 (Windows)

WavPack is a completely open audio compression format providing lossless, high-quality lossy, and a unique hybrid compression mode. Although the technology is loosely based on previous versions of WavPack, the new version 4 format has been designed from the ground up to offer unparalleled performance and functionality. In the default...

Tags: Archiving, Microsoft Windows, Mode, WavPack, Compression Ratio, Business Intelligence, Enterprise Software, Software, Data Management

Software downloads 2009-09-27

Logitech Anywhere Mouse MX

Not to be outdone by Microsoft and its BlueTrack laser tracking technology, Logitech recently introduced the Anywhere Mouse MX with Logitech's new Darkfield laser sensor. Darkfield tracks on almost all surfaces, including nonmirrored glass--a surface where even Microsoft's BlueTrack doesn't work. The mouse also uses the company's new Unifying technology...

Tags: Mice, mouse, Logitech, Unifying, Mouse MX

Product reviews 2009-09-21

BCube: A High Performance, Server-Centric Network Architecture for Modular Data Centers

This paper presents BCube, a new network architecture specifically designed for shipping-container based, modular data centers. At the core of the BCube architecture is its server-centric network structure, where servers with multiple network ports connect to multiple layers of COTS (commodity o-the-shelf) mini-switches. Servers act as not only end hosts,...

Tags: Data Center, Network, Network Architecture, High Performance Server, BCube, Data Centers, Networking, Servers, Storage, Hardware, Data Management

White papers 2009-08-21

Juniper offers up white paper on energy efficiency for networks

The efforts of Cisco and IBM to extend the energy efficiency debate out of the data center and out into the network have been highly publicized, but I've made a pledge to myself to actively explore what other networking equipemnt providers are doing in this area. (Note to any networking...

Tags: Energy Efficiency, Network, Juniper Networks Inc., Networking, Heather Clancy

Blog posts 2009-08-10

Setting the record straight: SAN defrag is vital to storage performance.

Data volumes continue to grow. More companies are consolidating and virtualizing their IT infrastructures and far more demand is placed on storage performance. But one aspect that often gets overlooked is the role SAN disk defragmenting plays in improving performance. In particular, companies overlook the performance degradation due to file...

Tags: Performance, SAN, Diskeeper Corp., Storage Area Networks (SAN), Performance Management, Storage Management, Storage, Hardware, Human Resources, Workforce Management

White papers 2009-08-03

Setting the record straight: SAN defrag is vital to storage performance

Data volumes continue to grow. More companies are consolidating and virtualizing their IT infrastructures and far more demand is placed on storage performance. But one aspect that often gets overlooked is the role SAN disk defragmenting plays in improving performance. In particular, companies overlook the performance degradation due to file...

Tags: Performance, SAN, Diskeeper Corp., Storage Area Networks (SAN), Performance Management, Storage Management, Storage, Hardware, Human Resources, Workforce Management

White papers 2009-08-03

Just-in-Time Intelligence Helps Comic Relief Boost Donations 25% While Reducing Failure Risk

Comic Relief wanted to calculate real-time online donations for broadcast during Red Nose Day 2009, a seven-hour, live, televised fundraising event and identify the clips that generate the highest emotional response from the public and result in high levels of donations so that they can be re-run throughout the event...

Tags: Oracle Corp., JIT, Databases, Disaster Recovery, Quality, Storage, Enterprise Software, Software, Data Management, Business Operations, Hardware

Case studies 2009-08-01

Linksys WRT160N Wireless-N broadband router

If you're looking for a simple workhorse Wireless-N router, you'll be happy with the WRT160N, especially considering you can get it online for $80 or less. Overall, the WRT160N is much like Linksys' WRT320N router, minus the support for the 5Ghz band and Gigabit Ethernet. Nonetheless, it retains...

Tags: Routers & switches, Network technology, NETWORKING, Home networking, broadband router, broadband, Linksys WRT160N, router, Linksys Inc., network

Product reviews 2009-07-21

Linksys WRT160N

If you're looking for a simple workhorse Wireless-N router, you'll be happy with the WRT160N, especially considering you can get it online for $80 or less. Overall, the WRT160N is much like Linksys' WRT320N router, minus the support for the 5Ghz band and Gigabit Ethernet. Nonetheless, it retains...

Tags: Routers & switches, Network technology, NETWORKING, Home networking, Linksys WRT160N, router, Linksys Inc., network

Product reviews 2009-07-21

MultiCore AntiVirus & AntiSpyware 2.001.00036 (Windows)

A new unique MultiCore AntiVirus & AntiSpyware product reliably defends PC against computer malware and on-line threats at unsurpassed, highest security levels. Nowadays traditional security solutions cannot provide sufficient protection of computers against continuously increasing amount of malware code. Antivirus labs of individual vendors are just unable to handle with...

Tags: Antivirus, Malware, Microsoft Windows, Multi-core, NuWave Software, MultiCore AntiVirus & AntiSpyware Product, Underlying Software Technology, Spyware, Adware & Malware, Cyberthreats, Viruses And Worms, Security

Software downloads 2009-06-25

iBoss Home Parental Control Wireless-N router

Priced at an affordable $40, the iBoss Home Parental Control Wireless-N is, however, not an affordable choice, thanks to its $59 annual cost that accrues after the first month of use. Over time, this fee could make it one of the most expensive Wireless-N routers on the market; and the...

Tags: Routers & switches, Network technology, NETWORKING, router, iBoss Home Parental Control Wireless-N, Wireless-N Router, computer

Product reviews 2009-06-05

Poor economy saves Mac community from clone crap

Poor economy saves Mac community from clone crapRE: Poor economy saves Mac community from clone crapOh you'll enjoy my response to this, David. :)Can you point me to the reliability data you used......in order to reach the conclusion Psystar computers were more failure prone than Apple computers. Thanks.RE: Poor economy...

Tags: Desktops, Apple Inc., Apple Macintosh, Mac Community, Poor economy, Dell Computer Corp.

Discussion threads 2009-05-27

Nvidia: We're ready for Microsoft this time (no, really)

Nvidia: We're ready for Microsoft this time (no, really)The Windows video driver model was changedThis is one big reason video drivers were a hassle when Vista came out. But since that wasn't the case with the release of Windows 7, nVidia's boasting is full of hot air. I'm sure it...

Tags: Microsoft Windows Vista (Longhorn), Apple Mac OS X, Operating systems, Microsoft Corp., Microsoft Windows 7, NVidia Corp., Adobe Systems Inc., Quark Inc., Microsoft Windows Vista, Microsoft Windows

Discussion threads 2009-05-07