Why Do Investors Love Amazon?

What’s happening at Amazon isn’t suppose to happen in modern finance. Shares are rising as profits are falling:

Amazon shares are up around 150 percent since mid-2010, which perhaps not coincidentally was the last time the company had sizable profits. In other words, investors really decided they loved the company only when net income began to slide.

Any fool can run a profitable company but it takes a gutsy person to build the world’s largest retailer….

[New York Times - All Amazon Is Missing Is a Profit]

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Fido Learns A New Trick

I use Mondoarchive to create Linux recovery disks. Each server writes ISO images to a shared volume on a weekly basis. If any file inside that directory is older than seven days, then a server failed to create an ISO. In order to monitor this directory for failure, I added a new feature to fido. Exciting!

Starting with version 1.1.0 (click to download), fido can monitor a file or directory to see if it — or any file inside it — is older than a user configurable period of time. If fido discovers a file whose modification date exceeds the configured time, it fires an alert.

The following example illustrates how to configure the use case above:

/export {
  rules = exceeds 8 days
  exclude = ^\.|^lccns178$|^lccns179$|^lccns335$|lccns336$
  throttle = 12 hours
  action = /etc/fido/notify.sh
}

This file block applies to “/export” which is a directory. Since it’s a directory, the rules apply to every file inside it. In this case ‘rules’ is pretty straight forward. We’re looking for files that exceed eight days in age. This rule will always follow this format: exceeds [int] [modifier]. The modifier can be seconds, minutes, hours or days. If you take the long view — if you’re concerned about events far into the future — then you’ll have to do some math. We don’t designate years so you’ll have to use 1825 days if you want to be alerted five years out.

We also find a new feature inside this block. ‘exclude’ takes a regular expression and tells fido which files to ignore. Currently, ‘exclude’ only works inside a file block with an exceeds rule but I plan to make better use of it.

Finally we notice one final feature that we’ve never seen before. The ‘throttle’ directive tells fido how long to wait between alerts. In this scenario, fido will trigger an alert the second it finds a file which exceeds 8 days. If the problem is not addressed within twelve hours, it will fire another alert. Alerts will continue in twelve hour intervals until the problem is corrected.

I hope you enjoy these features. If there are enhancements you’d like to see, feel free to contact me either in the comments or by email.

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Gub’mint (IT) Mule

bureaucratsSean Gallagher has an interesting piece on (ars)technica. He asks, “Why do government IT projects fail so hard and so often?” Gallagher provides several reasons, most of which are symptoms of a large organization. Let’s examine that list.

1. The government uses antiquated technologies. Its bureaucracy is slow to move and slow to adapt. Older technologies remain long after their life cycle expires largely because the approval process for new ones is long and arduous. You can imagine many frustrating meetings that end with, “Fsck it. We’ll put it on XP.”

2. Its user base is really large. Gallagher cits as one example a DOD email rollout that touched 1.5 million users. That’s an astonishing number for an in-house IT department. Certainly there are web companies with more users — there are 425 million GMail accouts, for instance — but Google does web for profit. The army’s IT department is an expense.

3. Flawed metrics. Gallagher notes that many government IT dashboards are filled with nice metrics that contain a lot of nines. Unfortunately, those nines have little bearing on end user experience. If department CIOs measured things that mattered, they’d be filled with zeros.

I’m sure these are valid criticisms but how do they vary from other large organizations? I work for a large corporation and this week my company finally moved my laptop off Windows XP. There’s no way the entire organization will be XP-free by end-of-life-cycle. It took a Great Recession to convince management that Linux was a viable alternative to HP-UX.

Our user base is 15,000 and every internal roll-out contains some glitches or problems. The army rolls out applications to a user base that is two orders of magnitude larger than ours. Where we roll out in a carefully controlled environment, they have to provide service to all corners of the world. Some of those corners are pre-fab barracks on an Afghanistan mountain top.

I’m yet to meet a person in my company who likes our out-sourcing partner. The bean counters like how little they cost, but they’re not happy with their services either. Yet if you look at this partner’s dashboard, you’ll find it’s filled with as many nines as those government CIOs. Faulty metrics aren’t limited to the public sector.

The Affordable Care website famously crashed during its rollout. Yet on the surface it wasn’t subject to many of government IT’s shortcomings. Most of the work was handled by a private partner. They used apache webservers on Linux. The site was fronted by the Akamai CDN which greatly reduces load by moving content close to the users. Most importantly, the site wasn’t tied to antiquated government infrastructure. Yet it failed. Why?

When you examine the site you find it’s simply not optimized for heavy traffic. The pages are too heavy and they contain too many elements. Fifty-six javascript files? Really? Then we learn the system was tested under load that was an order of magnitude less then what they received on October 1st. The site was basically slash-dotted.

Certainly there are good failures and bad failures. Collapsing under the weight of your own popularity is a good one. Still, with better planning and better coding the Affordable Care site could have experienced a more successful roll-out. Those operations require a high level of expertise which brings us to what I suspect is the real reason government IT projects fail: constrained by the tax payer’s dime, government can’t attract the talent necessary to service a very large user base. In other words, we get what we pay for.

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Siege 3.0.4 Becomes Part of the Problem

Siege 3.0.4 was just released. It contains a feature that I’ve added with a certain amount of reluctance. To understand the feature and the reason for my trepidation, let’s visit RFC 2616 and read what it has to say about Location headers:

For 3xx responses, the location SHOULD indicate the server's
preferred URI for automatic redirection to the resource. The 
field value consists of a single absolute URI.
    Location = "Location" ":" absoluteURI
An example is:
    Location: http://www.w3.org/pub/WWW/People.html

That’s pretty clear, right? The value of a location header must be an absolute URI. Yet a large number of developers ignore that directive. Here’s the response from a server running SquirrelMail, a popular web-based email program:

     HTTP/1.1 302 Found
     Date: Tue, 17 Sep 2013 16:50:52 GMT
     Server: CERN/1.0A
     X-Powered-By: PHP/5.2.5
     Location: src/login.php
     Content-Length: 0
     Connection: close
     Content-Type: text/html; charset=WINDOWS-1251

Although that Location header violates RFC 2616, nearly every web client will follow it to SquirrelMail’s intended destination. I say “nearly every client.” Until version 3.0.4, siege wouldn’t have followed it any where. It would have scratched its head and said, “Fsck it. Next URL.”

It is with some reluctance that I’ve included siege in the community of clients that allow developers to circumvent established standards. This convention has created a slew of bad coding practices on the world wide web. Didn’t close a table with an end tag? That’s okay, M$ will close it for you. Used a relative URI in a Location header? Don’t worry, siege will normalize it for you.

Ironically, version 3.0.4 includes one other feature enhancement. Its default User-agent is now in full compliance with RFC 2616. You win some, you lose some. And so it goes….

Posted in Applications, Siege | 5 Comments



Siege 3.0.3 and URL Encoding

URL encodingURL encoding aka URL escaping aka percent encoding is a mechanism for converting URL characters into a format that can be transmitted by HTTP. Reserved characters are replaced by a hexadecimal value preceded with a ‘%’ which is an escape character. If a URL contains a space, for example, it must be encoded for transmission. Your browser takes a space and reformats it as %20.

Siege, on the other hand, does nothing. It expects you to encode your own damn URLs … that is, until now! Percent encoding is available in siege starting with version 3.0.3-beta2. When it emerges from beta, the first stable version to support this feature will be 3.0.3.

Really? Siege has been around since 1999 and you’re only now adding this feature?

Well, you guys never asked and I haven’t had much need for it. Lately, however, I’ve noticed many of you are asking about json. I suspect URL escaping will be helpful to those folks. Consider this:

siege -g ‘http://www.joedog.org/siege/echo.php?q={ “Hello” : “world” }’

 GET /siege/echo.php?q=%7B%20%22Hello%22%20:%20%22world%22%20%7D HTTP/1.0
 Host: www.joedog.org
 Accept: */*
 User-Agent: JoeDog/1.00 [en] (X11; I; Siege 3.0.3-beta2)
 Connection: close

Booya! Just make sure you single quote the URL like in the example above.

Since URL escaping is in its early stages, I’ve provided a mechanism for disabling it. Inside $HOME/.siegerc add the following: url-escaping = false The default value is true.

Anything else in version 3.0.3-beta2 that we should know about?

Why yes! We changed behavior for -g/–get. When you retrieve a page using -g/–get, siege sets its protocol to HTTP/1.0 so the page is human readable. We don’t need to read chunked encodings and neither do you.

 

H/T: Your JoeDog would like to give a shout out to the folks at wget from whom he completely stole most of the code necessary to implement URL escaping. Cheers.

 

Posted in Applications, Siege | 1 Comment



Programmers – Can’t Live With ‘em…

slotnikA programmer’s wife sends him on an errand with the following instructions: “Run to the store and get a loaf of bread. If they have eggs, get a dozen. He returned with 12 loaves of bread.

So she sends him back with revised instructions: “Go to the store and get some bread. While you’re there, pick up some eggs.” The programmer never returned….

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Notions To Ponder

Fast Company provides a glimpse into the current state of American management:

Several studies in recent years have shown a remarkable number of people believe they work for a bad boss. As evidence of how deeply this affects engagement, 35% of U.S. workers polled by Parade magazine last summer said they’d willingly forgo a substantial pay raise in exchange for seeing their direct supervisor fired.

[Fast Company]

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I’m Speed Racer And I Drive Real Fast

When it comes to supercomputing Linux is king. The top forty-three fastest supercomputers in the world run Linux. The forty-fourth fastest, which does weather forecasting in Europe, runs IBM’s AIX.  How does Windows fare in the world of supercomputing? Not well. Just three of the boxes classified as supercomputers run Microsoft Windows. The fastest of these is in Shanghai. It ranks 187th in the world….

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US Sperm and World Reports

Here’s something you may not know: The United States is the world export leader of human sperm. It’s true! Our neighbors to the north — what are you guys called again: Canada? — are net importers. And now you know….

(I kid you, Canada. I love you like the cranky neighbor upstairs who’s always stomping on my ceiling just as the party gets going….)

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What are worse: Fanboys or Trolls?

Martin Gräßlin, a KDE Window Manager maintainer, posts an interesting article about his experiences inside the free software community. Those experiences would eventually cause him to alter his political views. Gräßlin initially viewed any infringement on freedom as problematic. Freedom of speech, he thought, was democracy’s most important right. Yet now he thinks some forms of censorship should be encouraged. This one-time orthodox liberal now finds himself occasionally deleting comments. What caused this change of heart? “The answer is simple: Fanboys and trolls.”

Of the two, he thinks fanboys are worse….

NOTE: for those unfamiliar with German, ß is shorthand for “ss” and ä can be represented as “ae” so we could Anglicize Martin’s last name as “Graesslin.” And now you know…

 

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