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Entries for December 2008

Welcome to this addition of the PowerShell ABC's where you'll find 26 posts detailing a component of the PowerShell scripting language, one letter at a time.  Today's letter is the letter "I".  For "I", I opted for a couple of operators that you might not know about, but come in very handy with PowerShell's loosely typed framework.  The word for today is "is" (with a double bonus of "isnot" and "as"). In a previous post, I talked about the PowerShell's Arithmetic Operators.  In addition to Arith...
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 head. Back with more cool examples of what iRules can do in a scant 20 lines of code, this week's 20LoL brings you three different HTTP goodies.   Fully Decode URIhttps://devcentral.f5.com/Wiki/default.aspx/iRules/FullyDecodeURI.htmlThis cool example from the wi...
articleus December 31, 2008 by Jason Rahm
The DevCentral iRules, iControl, & Advanced Design & Configuration wikis are flourishing.  However, if you are not listening to the weekly roundup podcast, you may not be aware of the excellent contributions hitting the site.  This series will highlight new and interesting contributions from you, the community! Ruby makes a splash Community member mkelly spends significant cycles in testing and developed some iControl tools to increase the efficiency of test scenario setup an...
It's probably no surprise from those of you that follow my blog and tech tips here on DevCentral that I'm a fan of Windows PowerShell.  I've written a set of Cmdlets that allow you to manage and control your BIG-IP application delivery controllers from within PowerShell and a whole set of articles around those Cmdlets. I've been a Twitter user for a few years now and over the holidays, I've noticed that Jeffrey Snover from the PowerShell team has hopped aboard the Twitter bandwagon and that got ...
Welcome to this addition of the PowerShell ABC's where you'll find 26 posts detailing a component of the PowerShell scripting language, one letter at a time.  Today's letter is the letter "H".  For "H", I'm going to talk about a feature that PowerShell Guru Jeffrey Snover loves talking about each time I see him: Here-Strings. Before we get to here-strings, it's probably a good idea to go over the different kinds of string literals in PowerShell.  There are actually 4 different kinds of string l...
articlenewstechtip December 30, 2008 by Jason Rahm
Last time, we covered the TCP Congestion Control Algorithms.  This week, we'll discuss the delayed acknowledgements, selective acknowledgements, D-SACK, and Ack on Push. Introduction The LTM TCP profile has over thirty settings that can be manipulated to enhance the experience between client and server.  Because the TCP profile is applied to the virtual server, the flexibility exists to customize the stack (in both client & server directions) for every application delive...
Welcome to this addition of the PowerShell ABC's where you'll find 26 posts detailing a component of the PowerShell scripting language, one letter at a time.  Today's letter is the letter "G".  For "G" I've picked a feature that was introduced in version 2.0 of the .NET Framework that allows for creating more generic types of objects.  So, today's word is "Generics". Generics allow you to create generic objects such as collections without being constrained to the specific type of object that it ...
articleperformanceaccelerationus December 23, 2008 by Dawn Parzych
Phew, I completed the series before I head off for almost 3 weeks (I'll be back blogging January 12th).  Below is the complete list in case you missed any of them.  A is for Asymmetric B is for Browser C is for Cache-Control D is for Dynamic Data E is for Expires F is for Firebug G is for GZIP H is for HttpWatch and HttpFox I is for Invalidation J is for JavaScript ...
Sticking with my VM/Roadwork analogy; seems to hold up rather well.  :) I've been working a good bit lately on VDI architecture in the data center.  Not so much the implementation of things like VMware View and building brokers and such, but one level up on topics like application traffic management and universal access and user policies.  Fun stuff  but I do wish I could add a few more hours in the work day so I could spend more time on these ideas - I still haven't given ThinApp the time it ...
There's an old medical adage that goes something like "When you hear hoof beats look for horses, not zebras."  Zebras are rare and exotic, while horses are much more common. It is often times best to think of common solutions first like a horse than to look for an exotic solution like a zebra.  This same adage applies to acceleration, start with the simple things first before attempting the more advanced options.   By starting with the common items you can start to see immediate benefits, the mo...
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