Devops needs feminism

I just returned to Minneapolis from Velocity NY bursting with ideas as always. The program was saturated with fantastic speakers, like my new ops crush Ilya Grigorik of Google. And my favorite part, as always, was the hallway track. I met dozens of brilliant, inspiring engineers. Allspaw, Souders, and Nash really know how to throw a conference.

One exhilarating thing about Velocity is the focus on culture as a driving force for business. Everybody’s in introspection mode, ready to break down their organizational culture and work new ideas into it. It reminds me of artificial competence in genetic engineering. It’s a joy to experience.

But despite all this wonderful cultural introspection, y’know what word you don’t hear? Y’know what drags up awkward silences and sometimes downright reactionary vitriol?


As long as we’re putting our tech culture under the microscope, why don’t we swap in a feminist lens? If you question any random geek at Velocity about gender, you can bet they’ll say “Women are just as good as men at ops,” or “I work with a female engineer, and she’s really smart!” But as soon as you say “feminism,” the barriers go up. It’s like packet loss: the crowd only hears part of what you’re saying, and they assume that there’s nothing else to hear.

We need to build feminism into our organizations, and Velocity would be a great venue for that. I’m just one engineer, and I’m not by any means a feminism expert, but I do think I can shed some light on the most common wrongnesses uttered by engineers when feminism is placed on the table.

Feminism != “Girls are better than boys”

Mention feminism to a random engineer, and you’re likely to hear some variation on:

I’m against all bias! We don’t need feminism, we just need to treat each other equally.

Feminism is often portrayed as the belief that women are superior, or that men should be punished for the inequality they’ve created. Feminism is often portrayed as man-hating.

Feminism is not that. Everyone defines it differently, but I like the definition at the Geek Feminism Wiki:

Feminism is a movement which seeks respect and equality for women both under law and culturally.

Equality. Everyone who’s not an asshole wants it, but we don’t have it yet. That’s why we need a framework in which to analyze our shortcomings, conscious and unconscious. Feminism can be that framework.

Imagine hearing an engineer say this:

Our product should perform optimally! We don’t need metrics, we just need to build a system that performs well.

Would this not be face-palmingly absurd? Of course it would. Metrics let you define your goals, demonstrate the value of your goals, and check how well you’re doing. Metrics show you where you’re losing milliseconds. Metrics are the compass and map with which you navigate the dungeon of performance.

Feminism is to equality as metrics are to performance. Without a framework for self-examination, all the best intentions in the world won’t get you any closer to an equality culture.

Wanting equality isn’t enough

When feminism comes up, you might hear yourself say something like this:

I already treat female engineers equally. Good engineers are good engineers, no matter their gender.

Hey great! The intention to treat others equally is a necessary condition for a culture of equality. But it’s not a sufficient condition.

This is akin to saying:

I’m really into performance, so our site is as fast as it can be.

You might be a performance juggernaut, but you’re just one engineer. You’re responsible for one cross-section of the product. First of all, one person doesn’t constitute a self-improving or even a self-sustaining performance culture. And even more crucially, there are performance mistakes you don’t even know you’re making!

Promoting equality in your organization requires a cultural shift, just like promoting performance. Cultural shifts happen through discourse and introspection and goal-setting — not wishing. That’s why we need to look to feminism.

If you start actively working to attack inequality in your organization, I guarantee you’ll realize you were already a feminist.

Feminism doesn’t require you to be ashamed of yourself

When your heart’s in the right place and you’re constantly examining your own actions and your organization’s, you start to notice bias and prejudice in more and more places. Most disturbingly, you notice it in yourself.

Biases are baked right into ourselves and our culture. They’re so deeply ingrained that we often don’t see or hear them anymore. Think anti-patterns and the broken windows theory. When we do notice our biases, it’s horrifying. We feel ashamed and we want to sweep them under the rug.

Seth Walker of Etsy gave an excellent talk at Velocity NY entitled A Public Commitment to Performance.” It’s about how, rather than keeping their performance shortcomings private until everything’s fixed, Etsy makes public blog posts detailing their current performance challenges and recent performance improvements. This way, everyone at the company knows that there will be public eyes on any performance enhancement they make. It promotes a culture of excitement about improvements, rather than one of shame about failures.

When you notice biases in your organization — and moreover when others notice them — don’t hide them. Talk about them, analyze them, and figure out how to fix them. That’s the productive thing to do with software bugs and performance bottlenecks, so why not inequality?

Where to go from here

I’m kind of a feminism noob, but that won’t stop me from exploring it and talking about it. It shouldn’t stop you either. Geek Feminism is a good jumping-off point if you want to learn about feminism, and they also have a blog. @OnlyGirlInTech is a good Twitter account. I know there’s other stuff out there, so if you’ve got something relevant,  jam it in the comment section!

EDIT on 2013-10-21: Here are some links provided in the comments by Alexis Finch (thanks, Alexis Finch!)

Ada Initiative – focused on OpenSource, working to create allies as well as support women directly

Girls Who Code – working with high school girls to teach them the skills and provide inspiration to join the tech fields

LadyBits – adding women’s voices to the media, covering tech and science [w/ a few men writing as well]

Reductress – satire addressing the absurdity of women’s portrayal in the media [The Onion, feminized]

WomenWhoCode & LadiesWhoCode & PyLadies – if you want to find an expert engineer who happens to also be of the female persuasion [to speak at a conference, or to join your team] these are places to find seasoned tech folks, as well as for those new to tech to get started learning, with chapters worldwide. & &

Making a quick data visualization web-app with Shiny

Lately we’ve been getting concerned about our PHP error log. You know the story: errors start popping up, but they’re not causing problems in production, so you move on with your busy life. But you know in your heart of hearts that you should really be fixing the error.

The time has come for us to prune those errors, and I thought the first step should be, as always, to look at the data. Since it’s really the PHP developers who will know what to do with it, I thought it might be useful to make my analysis interactive. Enter Shiny: a web app framework that lets users interact directly with your data.

The first step was to massage my log data into a CSV that looks like this:


For each date, indicates the file and line on which the error occurred, error.count is how many times that error occurred on that date, and access.count is the total number of hits our app received on that date. With me so far?

Now I install Shiny (sure, this is artifice — I already had Shiny installed — but let’s pretend) at the R console like so:

install_github('shiny', 'rstudio')

And from the shell, I start a project:

mkdir portalserr
cd portalserr
cp /tmp/portalserr.csv .

Defining the UI

Now I write my app. I know what I want it to look like, so I’ll start with ui.R. Going through that bit by bit:

  headerPanel("PHP errors by time"),

I’m telling Shiny how to lay out my UI. I want a sidebar with form controls, and a header that describes the app.

    checkboxGroupInput("errors_shown", "Most common errors:", c(

Now we put a bunch of checkboxes on my sidebar. The first argument to checkboxGroupInput() gives the checkbox group a name. This is how server.R will refer to the checkbox contents. You’ll see.

The second argument is a label for the form control, and the last argument is a list (in non-R parlance an associative array or a hash) defining the checkboxes themselves. The keys (like davidbowie.php:50) will be the labels visible in the browser, and the values are the strings that server.R will receive when the corresponding box is checked.


We’re finished describing the sidebar, so now we describe the main section of the page. It will contain only one thing: a plot called “freqPlot”.

And that’s it for the UI! But it needs something to talk to.

Defining the server

The server goes in — surprise — server.R. Let’s walk through that.

logfreq <- read.csv('portalserr.csv')
logfreq$date <- as.POSIXct(logfreq$date)
logfreq$perthou <- logfreq$error.count / logfreq$access.count * 10^3

We load the CSV into a data frame called logfreq and translate all the strings in the date column into POSIXct objects so that they’ll plot right.

Then we generate the perthou column, which contains the number of occurrences of a given error on a given day, per thousand requests that occurred that day.

shinyServer(function(input, output) {

Okay now we start to see the magic that makes Shiny so easy to use: reactivity. We start declaring the server application with shinyServer(), which we pass a callback. That callback will be passed the input and output parameters.

input is a data frame containing the values of all the inputs we defined in ui.R. Whenever the user messes with those checkboxes, the reactive blocks (what does that mean? I’ll tell you in a bit) of our callback will be re-run, and the names of any checked boxes will be in input$errors_shown.

Similarly, output is where you put the stuff you want to send back to the UI, like freqPlot.

But the coolest part of this excerpt is the last bit: renderPlot({. That curly-bracket there means that what follows is an expression: a literal block of R code that can be evaluated later. Shiny uses expressions in a very clever way: it determines which expressions depend on which input elements, and when the user messes with inputs Shiny reevaluates only the expressions that depend on the inputs that were touched! That way, if you have a complicated analysis that can be broken down into independent subroutines, you don’t have to re-run the whole thing every time a single parameter changes.

     lf.filtered <- subset(logfreq, %in% input$errors_shown)

      p <- ggplot(lf.filtered) +
        geom_point(aes(date, perthou,, size=3) +
        geom_line(aes(date, perthou,,, size=2) +
        expand_limits(ymin=0) +
        theme(legend.position='left') +
        ggtitle('Errors per thousand requests') +
        ylab('Errors per thousand requests') +

This logic will be reevaluated every time our checkboxes are touched. It filters the logfreq data frame down to just the errors whose boxes are checked, then makes a plot with ggplot2 and sends it to the UI.

And we’re done.

Running it

From the R console, we do this:

> runApp('/path/to/portalserr')

Listening on port 3087

This automatically opens up http://localhost:3087 in a browser and presents us with our shiny new… uh… Shiny app:

Why don’t we do it in production?

Running Shiny apps straight from the R console is fine for sharing them around the office, but if you need a more robust production environment for Shiny apps (e.g. if you want to share them with the whole company or with the public), you’ll probably want to use shiny-server. If you’re putting your app behind an SSL-enabled proxy server, use the latest HEAD from Github since it contains this change.

Go forth and visualize!

Quirks are bugs

“Stop Expecting That.”

When you use a program a lot, you start to notice its quirks. If you’re a programmer yourself, you start to develop theories about why the quirks exist, and how you’d fix them if you had the time or the source. If you’re not a programmer, you just shrug and work around the quirks.

I review about 400 virtual flash cards a day in studying for Jeopardy, so I’ve really started to pick up on the quirks of the flash card software I use. One quirk in particular really bothered me: the documentation, along with the first-tier support team, claims that when cards come up for review they will be presented in a random order. But I’ve noticed that, far from being truly random, the program presents cards in bunches of 50: old cards in the first bunch, then newer and newer bunches of cards. By the time I get to my last 50 cards of the day, they’re all less than 2 weeks old.

So I submitted a bug report, complete with scatterplot demonstrating this clear pattern. I explained “I would expect the cards to be shuffled evenly, but that doesn’t appear to be the case.” And do you know what the lead developer of the project told me?

“Stop expecting that.”

Not in so many words, of course, but there you have it. The problem was not in the software; it was in my expectations.

It’s a common reaction among software developers. We think “Look, that’s just the way it works. I understand why it works that way and I can explain it to you. So, you see, it’s not really a bug.” And as frustrating as this attitude is, I can’t say I’m immune to it myself. I’m in ops, so the users of my software are usually highly technical. I can easily make them understand why a weird thing keeps happening, and they can figure out how to work around the quirk. But the “stop expecting that” attitude is wrong, and it hurts everyone’s productivity, and it makes software worse. We have to consciously reject it.

Quirks are bugs.

A bug is when the program doesn’t work the way the programmer expects.

A quirk is when the program doesn’t work the way the user expects.

What’s the difference, really? Especially in the open-source world, where every user is a potential developer, and all your developers are users?

Quirks and bugs can both be worked around, but a workaround requires the user to learn arbitrary procedures which aren’t directly useful, and which aren’t connected in any meaningful way to his mental model of the software.

Quirks and bugs both make software less useful. They make users less productive. Neglected, they necessitate a sort of oral tradition — not dissimilar from superstition — in which users pass the proper set of incantations from generation to generation. Software shouldn’t be like that.

Quirks and bugs both drive users away.

Why should we treat them differently?

Stop “Stop Expecting That”ing

I’ve made some resolutions that I hope will gradually erase the distinction in my mind between quirks and bugs.

When I hear that a user encountered an unexpected condition in my software, I will ask myself how they developed their incorrect expectation. As they’ve used the program, has it guided them toward a flawed understanding? Or have I just exposed some internal detail that should be covered up?

If I find myself explaining to a user how my software works under the hood, I will redirect my spiel toward a search for ways to abstract away those implementation details instead of requiring the user to understand them.

If users are frequently confused about a particular feature, I’ll take a step back and examine the differences between my mental model of the software and the users’ mental model of it. I’ll then adjust one or both in order to bring them into congruence.

Anything that makes me a stronger force multiplier is worth doing.