How to Modify Machine.config on Windows Azure Web Roles

Earlier this week I spent some time helping a company troubleshoot some performance issues with Windows Azure – their ASP.NET request queue was growing longer than the maximum amount of queued requests supported by default in IIS (5000) during bursts of high activity, so I had to help them find a way to empty the queue faster.

One way to do this is to modify the number of max/min IO and worker threads available to any web role instance, and these values can only be modified through machine.config settings.

As you know, Windows Azure VMs are not persistent so you can’t modify machine.config and save it to file system like how you might if you were hosting IIS on your own local box.

Thus, I crafted a solution using AppCmd and Windows Azure startup tasks.

Here’s some of the code below:

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How to Migrate Data between On-Premise SQL Server 2008 R2 and SQL Azure Without Getting a Migraine

I love my job at Microsoft, but there are some times when we simply make it really damn hard for people to do business with us. Migrating data from an on-premise SQL Server to SQL Azure is sadly one of those lapses where, for whatever reason, we’ve left people who aren’t full time SQL Server DBAs totally lost in the wilderness with a set of poorly documented and often dysfunctional tools.

After spending a couple of hours shaving yaks myself tonight trying to move a ~250mb data set (small, but not trivially small) from one SQL Azure database to another, I thought it would be best if I documented what I did to make it work.

Scenario: I needed to download an expensive dataset on one SQL Azure account and migrate it to another on a different SQL Azure subscription, but I needed to make and test some schema changes...

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Rise of the Popped Collar Programmer

I am frankly disturbed by a trend that I’ve seen both in-person and all over Hacker News / Reddit through the past year, and I am going to finally give it a name: “popped collar programming.”

Popped collar programming is the hipsterization of software development, and it’s happening in a co-working space, unprofitable venture-backed startup, or coffee shop near you.

A popped collar programmer’s life begins like this:

  1. [New Technology X] is released and offers a new and interesting view of how to perform [programming chore Y];

  2. Reddit / Hacker News announces the release of  [New Technology X] and is greeted with tons of enthusiasm and applause;

  3. Curious developers check [New Technology X] out – it’s an early release and thus they discover [New Technology X] is missing [Critical Features 1….N] and has [Stability Issues 1…N]; most of the early adopters utilize the technology...

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How to Use Dependency Injection (Ninject) with WCF Services

I spent a lot of time late last week trying to figure out exactly how to set up dependency injection for a WCF service I was developing on Windows Azure; there’s some documentation out there on how to do it, but it’s not nearly as helpful as I would like it. Thus I decided to document how I made WCF and Ninject play nice with each other, and I even provide a sample template you can use yourself.

Step 1 – Install Ninject.Extensions.WCF via NuGet

The developers who maintain Ninject were kind enough to put together a set of extensions for working with WCF applications specifically, and we can install this via NuGet (install it from CodePlex.)

Simply type this into the “package manager console” in Visual Studio: install-package Ninject.Extensions.Wcf

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New Open Source Project: MVC.Utilities

I announced this on Twitter late last week, but I open-sourced a number of common helpers and service interfaces that I use throughout all of my production ASP.NET MVC applications and wrapped it into a project I call MVC.Utilities.

MVC.Utilities has a number of helper classes for the following:

  1. Encryption;
  2. Caching;
  3. Authentication;
  4. Routing;
  5. Security for user-uploaded files;
  6. and display helpers for things like Hacker News-style datetimes.

 

If you want more details and examples of what the library does exactly, be sure to check out the MVC.Utilities Wiki on Github. All of these services are meant to be Dependency-Injected into ASP.NET MVC controllers and are designed as such.

The library has a lot of room to expand and grow, and I encourage your ideas and contributions to the project! Just create a fork of MVC.Utilities on Github and send me a pull request; props to...

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How to Recruit a Technical Co-Founder for Your Startup

The LA startup scene is fascinating, having lived and worked in it for a year now - it's a scene teeming with brillaint people with big ideas, and it's starting to attract some major capital from the Bay Area. It has one major issue: a big shortage of technical co-founders.

As a result, people like me get approached fairly regularly by companies that are either trying to recruit me or recruit through me - the vast majority of the time it's a pair of non-technical co-founders looking to third founder aboard, a technical cofounder, to build the MVP prior to raising some money. In my personal experience, the majority of pitches I've received have been poorly calculated and in need of much improvement.

Speaking as a former and future technical founder, I wanted to share my perspective on what non-technical (and technical, for that matter) founders could do differently to...

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MongoDB vs. SQL Server 2008: A .NET Developer’s Perspective

One of the first projects I put together this year was Captain Obvious, a nifty little application that runs off of AppHarbor and ASP.NET MVC3. What made Captain Obvious special for me was that it was my first time using something other than a relational database[footnote: typically I’ve only used SQL Server / MySQL in the past] in production – I chose MongoDB because it stands out to me as a lightweight, easy-to-work with store that’s easier to use for most CRUD applications. Since then I’ve gone on to build other projects which depend on Mongo.

What I’ve learned since is that MongoDB and SQL Server are tools that aren’t 100% interchangeable and are more situational than dogmatists make them out to be.

My goal in writing this is to help inform you on how you should decide to judge these two technologies as options for...

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How to Securely Verify and Validate Image Uploads in ASP.NET and ASP.NET MVC

One of the more interesting things I had to do as part of building XAPFest was handle bulk image uploads for screenshots for applications and user / app icons. Most of the challenges here are UI-centric ones (which I resolved using jQuery File-Upload) but the one security challenge that remains outstanding is ensuring that the content uploaded to your servers is safe for your users to consume.

Fortunately this problem isn't too hard to solve and doesn't require much code in C#.

Flawed Approaches to Verifying Image Uploads

Here's what I usually see when developers try to allow only web-friendly image uploads:

  1. File extension validation (i.e. only allow images with .png, .jp[e]g, and .gif to be uploaded) and
  2. MIME type validation.

So what's wrong with these techniques? The issue is that both the file extension and MIME type can be spoofed, so there's no guarantee that...

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How I Built CaptainObvio.us

Captain Obvio.us - a place to share ideasI made a tiny splash on Hacker News a month ago when I asked for feedback on my newest side project, CaptainObvio.us – a simple portal for sharing ideas and soliciting feedback from a community of peers. The idea was popular and I’ve received a ton of feedback – I’ve implemented most of the Hacker News community’s suggestions but haven’t had the chance to do another round of customer development.

What I wanted to share in this blog post was some of the secret sauce I used for creating CaptainObvio.us – I originally created it mostly to learn MongoDB, and learned way more than that along the way.

Webstack: ASP.NET MVC3 on AppHarbor

I used ASP.NET MVC3 as my webstack of...

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Announcing XAPFest – A Massive Windows Phone 7 Hackathon in Santa Monica, CA on June 4th 2011

xapfest_black_logoI am pleased to announce something very exciting that Microsoft is doing in my neighborhood of Santa Monica, California: we’re putting together XAPFest, a massive Windows Phone 7 hackathon aimed to bring together startups and mobile developers of all skill levels for a day of creativity and competition.

XAPFest is going down on Saturday, June 4th at the Loews Santa Monica Beach Hotel (directions) – doors open at 9:00am and will close at approximately 10:00pm. There will be opportunities for individuals and teams of developers to win prizes, eat great food, and have fun hacking down by the beach.

XAPFest is free to attend, and anyone can register for XAPFest if they wish to participate.

...

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