Learn F5 Technologies, Get Answers & Share Community Solutions Join DevCentral

Filter by:
  • Solution
  • Technology

Articles

Sort results

The Colonial Data Center and Virtualization

No, not colonial as in Battlestar Gallactica or the British Empire, colonial as in corals and weeds and virtual machines I was out pulling weeds this summer – Canada thistle to be exact – and was struck by how much its root system reminded me of... Read more
0 Reviews

Integration Topologies and SDN

The scalability issue with the #SDN model today isn’t that the data plane that won’t scale …it’s issues with the control plane. Reading “OpenFlow/SDN Is Not A Silver Bullet For Network Scalability” brought to light an important note that must be... Read more
0 Reviews

Applying ‘Centralized Control, Decentralized Execution’ to Network Architecture

#SDN brings to the fore some critical differences between concepts of control and execution While most discussions with respect to SDN are focused on a variety of architectural questions (me included) and technical capabilities, there’s another... Read more
0 Reviews

Cyclomatic Complexity of OpenFlow-Based SDN May Drive Market Innovation

#openflow #sdn Programmability and reliability rarely go hand in hand, especially when complexity and size increase, which creates opportunity for vendors to differentiate with a vetted ecosystem I’m reading (a lot) on SDN these days. That means... Read more
0 Reviews

F5 Friday: Ops First Rule

#cloud #microsoft #iam “An application is only as reliable as its least reliable component” It’s unlikely there’s anyone in IT today that doesn’t understand the role of load balancing to scale. Whether cloud or not, load balancing is the key... Read more
0 Reviews

F5 Friday: Killing Two Birds with One (Solid State) Stone

Sometimes mitigating operational risk is all about the hardware. MTBF. Mean Time Between Failure. An important piece of this often-used but rarely examined acronym is the definition of “mean”: The quotient of the sum of several quantities... Read more
0 Reviews

When Black Boxes Fail: Amazon, Cloud and the Need to Know

If Amazon’s Availability Zone strategy had worked as advertised its outage would have been non-news. But then again, no one really knows what was advertised… There’s been a lot said about the Amazon outage and most of it had to do with cloud... Read more
0 Reviews

Reliability? We've got your reliability right here...

When talking about IT performance and rating "must haves", data center reliability is often right near the top of the list, and for good reason. Performance and scalability, features and  functionality don't matter much unless... Read more
0 Reviews

Data Center Feng Shui: Reliability is not the Absence of Failure

But rather it is the ability to compensate for it. Redundancy. It’s standard operating procedure for everyone who deals with technology – even consumers. Within IT we’re a bit more stringent about how much redundancy we build into the data... Read more
0 Reviews

The Number of the Counting Shall be Three (Rules of Thumb for Application Availability)

Three shall be the number thou shalt count, and the number of the counting shall be three. If you’re concerned about maintaining application availability, then these three rules of thumb shall be the number of the counting. Any less and you’re... Read more
0 Reviews

Single Point of Failure Is Not Just a Hardware Issue

As those of you close to me know, I have an interest in historical military firearms. As a veteran, I of course have an interest in the M-16, since I used it, but otherwise my tastes run more to World War II era weapons of all countries... Read more
0 Reviews

Dear Developer: Step Away from the Keyboard

When it comes to availability, coding a solution is just delaying the inevitable Jonathan Howell, in Five Things That Will Kill Your Site – an excellent read, by the way, for all web application developers – asserts that there are several ways... Read more
0 Reviews

Scalability Only One Half the Reliability Equation

Without availability scalability is irrelevant I really enjoyed Jeff Atwood’s recent blog on Scaling Up vs Scaling Out, which includes a fairly detailed comparison of the costs associated with each approach to scalability. I enjoyed it because... Read more
0 Reviews

Virtual Network Infrastructure: Virtually Good Enough?

Two steps forward, three steps back Every time there is a major shift in technology thought about architecture the question of how it will and should impact infrastructure arises. When SOA was the “next great thing” there was a spate of... Read more
0 Reviews

Cloud outages don’t bother Stanley

Cloud may change the definition of “business critical” applicationsGoogle outages are rapidly becoming as passé as earthquakes to native Californians; unless it’s a really big one, no one really pays much attention. So it shouldn’t be... Read more
1 Review

Greedy (IT) Algorithms

Greedy algorithms can result in the right solution in the end, but rarely do Don and I were having a discussion with our oldest son the other night about writing a chess program. There are myriad options for implementing the learning aspects of a... Read more
0 Reviews

Cloud computing is not Burger King. You can’t have it your way. Yet.

Don’t confuse computing services with infrastructure services. We aren’t there yet. The subtext to the cloud computing discussion is subtle, as is the wont of subtext. But it is clear that underlying all the concerns about cloud computing is a... Read more
0 Reviews

Can the Cloud survive regulation?

One of the greatest strengths of the Cloud is that, like the Internet, it knows no boundaries. It crosses industry and international boundaries as if they do not exist. But as is often the case, your greatest strength can also be your greatest... Read more
0 Reviews

How Obama's Blueprint For Change Impacts IT

While doing some research on a related topic I dug into the technical aspects of Obama's Blueprint For Change. The plans around technology are fairly nebulous, with a few exceptions, such as those related specifically to broadband... Read more
0 Reviews

Building an elastic environment requires elastic infrastructure

One of the reasons behind some folks pushing for infrastructure as virtual appliances is the on-demand nature of a virtualized environment. When network and application delivery infrastructure hits capacity in terms of throughput - regardless of... Read more
0 Reviews

The Three "Itys" of Cloud Computing

No matter where you deploy it, it's still your application Related Reading Everyone's talking about cloud computing and cloudware (applications in the cloud) services and pointing to th... Read more
0 Reviews

Damned if you do, damned if you don't

There has been much fervor around the outages of cloud computing providers of late, which seems to be leading to an increased and perhaps unwarranted emphasis on SLAs the likes of which we haven't seen since...well, the last time the IT saw... Read more
0 Reviews

Reliability does not come from SOA Governance

An interesting InformationWeek article asks whether SOA intermediaries such as "enterprise service bus, design-time governance, runtime management, and XML security gateways" are required for an effective SOA. It further posits that SOA... Read more
0 Reviews

What OS Virtualization and Christmas Lights Have in Common

Anyone who's listened to Bob Rivers' Twisted The Twelve Pains of Christmas can probably relate to the angry husband screaming, "When one light goes out they all go out!" because, yeah, we've all been there. Imagine now, if... Read more
0 Reviews

Performance vs Reliability

Our own Deb Allen posted a great tech tip yesterday on conditional logic using HTTP::retry with iRules. This spawned a rather heated debate between Don and myself on the importance of performance versus reliability and application... Read more
0 Reviews