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Like Cars on a Highway.

Every once in a while, as the number of people following me grows (thank you, each and every one), I like to revisit something that is fundamental to the high-tech industry but is often overlooked or not given the attention it deserves.... Read more
0 Reviews

Service Virtualization Helps Localize Impact of Elastic Scalability

Service virtualization is the opposite of – and complementary implementation to – server virtualization. One of the biggest challenges with any implementation of elastic scalability as it relates to virtualization and cloud computing is... Read more
0 Reviews

They’re Called Black Boxes Not Invisible Boxes

Infrastructure can be a black box only if its knobs and buttons are accessible I spent hours at Interop yesterday listening to folks talk about “infrastructure.” It’s a hot topic, to be sure, especially as it relates to cloud computing. After... Read more
0 Reviews

It’s 2am: Do You Know What Algorithm Your Load Balancer is Using?

The wrong load balancing algorithm can be detrimental to the performance and scalability of your web applications. When you’re mixing and matching virtual or physical servers you need to take care with how you configure your Load balancer – and... Read more
1 Review

WILS: Virtual Server versus Virtual IP Address

load balancing intermediaries have long used the terms “virtual server” and “virtual IP address”. With the widespread adoption of virtualization these terms have become even more confusing to the uninitiated. Here’s how load balancing and... Read more
1 Review

Virtualization Changes Application Deployment But Not Development

Cloud computing management functionality and standards are right now laser-focused on virtual machines, and most APIs include the ability to stop,start,launch,etc…at that level of the infrastructure. This is because the application is still... Read more
0 Reviews

WILS: A Good Hall Monitor Actually Checks the Hall Pass

Are you monitoring the network, servers, stack, or the application? The answer may mean the difference between your application being available or not. One of the biggest problems with moving away from simple load balancing to application... Read more
0 Reviews

Taking Down Twitter as easy as D.N.S.

If they can take down Twitter via DNS, they can take your site, too. Everyone is talking about the DoS (Denial of Service) attack on Twitter but most of them are missing what really happened. We’re so used to defending against HTTP-based DoS... Read more
0 Reviews

I Can Has UR .htaccess File

Notice that isn’t a question, it’s a statement of fact Twitter is having a bad month. After it was blamed, albeit incorrectly, for a breach leading to the disclosure of both personal and corporate information via Google’s GMail and Apps, its... Read more
0 Reviews

An Unhackable Server is Still Vulnerable

Apparently if you’re attending the USENIX Security conference (August 12-14, 2009, in Montreal, Canada) you can participate in the Security Grand Challenge. What is that, you ask? Here’s how the organizers describe it: The concept is very... Read more
0 Reviews

Amazing Application Acceleration: Simultaneously improve productivity, efficiency, and performance

As a general rule, we spend far more time worrying about external appearances than we do internal. We are more concerned with our external web applications and how they look - and perform - than we are likely to regarding our intranet or internal... Read more
0 Reviews

Is Your Cloud Opaque or Transparent?

Cloud computing promises customers the ability to deliver scalable applications on-demand without the overhead of a massive data center. The visibility - and flexibility as well as control - you have into and over the cloud computing environment... Read more
0 Reviews
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Performance Testing Web 2.0: Don't forget the APIs

Keynote, well known for its application performance testing and monitoring services, just announced a new version of its KITE (Keynote Internet Testing Environment) that is now capable of testing Web 2.0 sites that make use of AJAX, Flash, and... Read more
0 Reviews

Honey? Does this format make my data look fat?

CNet is reporting that Google is ditching XML for a faster, more compact alternative known as ProtocolBuffers. I'm going to type this post really fast before Don finds out and starts laughing at me because he's always had this thing... Read more
0 Reviews

Layer 4 vs Layer 7 DoS Attack

Not all DoS (Denial of Service) attacks are the same. While the end result is to consume as much - hopefully all - of a server or site's resources such that legitimate users are denied service (hence the name) there is a subtle difference in... Read more
1 Review

The Disadvantages of DSR (Direct Server Return)

I read a very nice blog post yesterday discussing some of the traditional pros and cons of load-balancing configurations. The author comes to the conclusion that if you can use direct server return, you should. I agree with the author's list... Read more
1 Review

Fail Open or Fail Closed?

Bob owns a widget shop. Now this widget shop is not your ordinary widget shop, because the widgets are made from Swarovski crystal. Very expensive stuff. Bob is aware that losing any number of his widgets would be financially devastating, and t... Read more
0 Reviews