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Scaling Stateful Network Devices

One of the premises of #SDN and #cloud scalability is that it's easy to simply replicate services - whether they be application or network focused - and distribute traffic across them to scale infinitely. In theory, this is absolutely th... Read more
0 Reviews

Web 2.0 Killed the Middleware Star

Pondering the impact of cloud and Web 2.0 on traditional middleware messaging-based architectures and PaaS.   It started out innocently enough with a simple question, “What exactly *is* the model for PaaS services scalability? If based... Read more
0 Reviews

Load Balancing Fu: Beware the Algorithm and Sticky Sessions

The choice of load balancing algorithms can directly impact – for good or ill – the performance, behavior and capacity of applications. Beware making incompatible choices in architecture and algorithms.   One of the most persistent... Read more
0 Reviews

20 Lines or Less #47: Cross-Service Persistence, Auth, and Exemptions

What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week for the devcentral community, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be... Read more
0 Reviews

Amazon Makes the Cloud Sticky

Stateless applications may be the long term answer to scalability of applications in the cloud, but until then, we need a solution like sticky sessions (persistence) Amazon recently introduced “stickiness” to its ELB (Elastic Load Balancing)... Read more
0 Reviews

Load Balancing on the Inside

Business critical internal processing systems often require high-availability and fault tolerance, too. Load balancing and application delivery is almost always associated with scaling out interactive, web-based applications. Rarely does anyone... Read more
0 Reviews

20 Lines or Less #28

What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week for the devcentral community, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be... Read more
0 Reviews

20 Lines or Less #25

What could you do with your code in 20 Lines or Less? That's the question I ask (almost) every week, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting in over your... Read more
0 Reviews

Five questions you need to ask about load balancing and the cloud

Whether you are aware of it or not, if you’re deploying applications in the cloud or building out your own “enterprise class” cloud, you’re going to be using load balancing. Horizontal scaling of applications is a fairly well understood proc... Read more
0 Reviews

Cloud Computing: Is your cloud sticky? It should be.

Load balancing an application should, by now, be a fairly routine scaling exercise. But too often when an application is moved into a load balanced architecture it breaks. The reason? Application sessions are often specific to an application... Read more
0 Reviews

Understanding network-side scripting

We all understand the lines in the sand (or the architectural diagram) that separate client-side scripting from server-side scripting. It's very clear that client-side scripting, e.g. JavaScript, VBScript, ActionScript, executes on the client... Read more
0 Reviews

Why you still need layer 7 persistence

Tony Bourke of the Load Balancing Digest points out that mega proxies are largely dead. Very true. He then wonders whether layer 7 persistence is really all that important today, as it was largely implemented to solve the pro... Read more
0 Reviews

The third greatest (useful) hack in the history of the Web

Developers have an almost supernatural ability to workaround restrictions, even though some of the restrictions on building applications delivered via the web have been akin to a kryptonite. Like Superman fighting through the debilitating effects... Read more
0 Reviews

DevCentral Top5 7/11/2008

After a Friday off for the holiday here in the states, we're back at it again, and DevCentral is as busy as ever.  There's been some great content and some really fantastic banter alike on the site this week. Today we'll dive into... Read more
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Persistent and Persistence, What's the Difference?

The English language is one of the most expressive, and confusing, in existence. Words can have different meaning based not only on context, but on placement within a given sentence. Add in the twists that come from technical jargon and suddenly... Read more
Average Rating: 4.9
4 Reviews

20 Lines or Less #10

What could you do with your code in 20 Lines or Less? That's the question I ask every week, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting in over your head.With... Read more
1 Review

Sessions and Cookies and Persistence, oh my!

At some point (you hope!) it becomes necessary to implement load-balancing for your applications. So you went out and got one, either from a hardware vendor or maybe downloaded a solution, and put it into place. Now you're ready to go,... Read more
Average Rating: 4.9
5 Reviews

20 Lines or Less #6

What could you do with your code in 20 Lines or Less? That's the question I ask every week, and every week I go looking to find cool new examples that show just how flexible and powerful iRules can be without getting in over your head. ... Read more
0 Reviews

Podcast Links (17April 2008)

Podcast: 17 April 2008 My Tech Tip for this week: LTM: Dueling Timeouts Learn about setting appropriate connection timeout combinations for LTM. Forums posts I mentioned: GTM DNS responses not reflecting pool availability Customer was... Read more
0 Reviews

"Our code is so crappy, thank God for F5!"

I had an interesting conversation with a customer last week, and that there is a direct quote. Read more
0 Reviews

I haven't gotten out much lately...

... because I've been singularly focused on DevCentral content since I joined the group.  Which is my only excuse for not having any brill comments or astounding insights on goings-on elsewhere in the world of technology. But since... Read more
0 Reviews