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Posts Tagged "Network performance"

In the sequel of this blog, learn why cloud performance must be verified using the intended workload, what tools exist for evaluating the performance impact of cloud updates for a specific workload, and how to adjust cloud resourcing after changes to infrastructure to maintain performance levels.

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Based on our experience working with leading providers deploying carrier-Wi-Fi, we have developed the following best practice recommendations: 1) Go beyond the Access Point, 2) Be proactive, not passive, 3) Measure what matters, 4) Go 24/7, 5) Get to the root of the issue.

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The demands for increased bandwidth in the data center are driving the creation of a new generation of data center switch platforms. These platforms, whether they are top-of-rack (ToR) or aggregation switches, are designed to support hundreds of gigabits/sec per slot—even terabits. 

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As Nemertes Research, voke’s ITO (Infrastructure Test Optimization), and Gartner research notes, and numerous other sources observe, implementation of IT initiatives such as data center network design, consolidation, and virtualization represent significant infrastructure and budget commitments that carry considerable risk.

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A diverse array of component devices and applications in a unified architecture may cause network failure.

While individual devices and applications may work as planned, the complexity of an entire network, however, with configurations and associated firmware out of synch, can create a critical potential vulnerability that must be tested for defects that can bring down your network.

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Simply put, the network failure threshold is the point at which your network breaks under real-world applications and user bandwidth. So is it better to know that before or after you launch your IT initiative?

To put it another way, from Nemertes Research’s perspective (from their classic issue paper Strategic IT Initiatives need Strategic Testing): “Without proper testing, such strategic initiative can fail with serious unforeseen consequences, including significant hard dollar and opportunity costs.” They also observed the gains expected from an IT initiative can be minimized or erased if the testing is not implemented before an initiative goes live.

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As is the case with all marketing collateral, a company puts the best face on the product they want you to buy. In network equipment, part of that includes stating the capabilities of device, backed up by testing against particular requirements. While the device will likely perform exactly as described in the environment established by the vendor, how it performs in your network with your devices and your requirements is an entirely different proposition. “Results may vary.” Indeed.

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The crucial nature of testing the success of any data center initiative is widely recognized, but all testing is not created equal. Proper testing is required and is a critical element of ensuring this success. The set of industry best-practices described below were identified and defined after numerous data center testing engagements, across lines of business and around the globe, by Spirent’s team of Professional Services engineers.

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According to Network Computing and the Meta Group, the hourly cost of an hour of downtime ranges from $90 thousand for media to $6.48 million for a brokerage service, with telecom hitting in the middle at $2 million.* You don’t have to look far to find dramatic examples of the consequences of inadequate testing, or perhaps no testing at all.

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OFELIA, a pan-European environment for the research community, is conducting experiments in an OpenFlow-enabled wide-area network. OFELIA is based on a set of ten “islands” that create a diverse OpenFlow infrastructure that allows experimentation on multi-layer and multi-technology networks provided by the different islands.

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