Matt Williams

Author's details

Name: Matt Williams
Date registered: August 9, 2008
URL: http://matt@matthewkwilliams.com

Biography

Matt Williams lives in Columbus, OH, in a house filled with computers, cats, books and fiber. Pursuing the goal of being a modern Renaissance person, he plays with his daughter, cooks, roasts coffee, reads, weaves, studies, and hacks, including crazy ideas like a Cloud in a Box. Docker has been an especial passion since June of 2013.

Latest posts

  1. Weaving with Light Pt. 1 — August 31, 2016
  2. Abusing HAProxy: Stupid Simple Easy Dashboards — June 24, 2016
  3. Rules for Operations — April 25, 2016
  4. DevOps Creed (Work in Progress) — April 24, 2016
  5. I am not a Mindreader: a mini-saga — April 11, 2016

Most commented posts

  1. Swarming Raspberry Pi – Part 1 — 13 comments
  2. Docker, Cgroups, Memory Constraints, and Java: A Cautionary Tale, or Here be Reapers (sometimes) — 9 comments
  3. Shrinking Docker Images — 7 comments
  4. Rails & JRuby in a Jar — 7 comments
  5. rspec, restful_authentication, and login_required — 6 comments

Author's posts listings

Jan 23

Prawn’d by Scruffy, Gruff

Categories:

jruby, ruby

by

I’ve been putting together an automated report for my team, and decided to give prawn and scruffy a try.  I ended up using Gruff, but here are some of the lessons along the way: Scruffy has issues with bar charts and values from 1-3 (actual values were [1,3,1]).  I was able to get around this …

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2 comments

Jan 14

SSL and Java Keystores

Categories:

gotchas, tips

by

If you happen to change a machine’s name, be sure to delete the previous definition from the keystore.  Otherwise it will complain mightily and, indeed, fail when you attempt to add in the pem file.

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Dec 17

JBoss and Sesame Street’s Count

Categories:

jboss, tips

by

One, One database record! Two, Two database record! Muahahaha! By default, when using datasources with JBoss, it does a count to validate a connection, both on creation and when it is requested from the connection pool.  It looks something like: select count(*) from x Now, this can take take a while when working with tables …

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Dec 02

The “A” stands for Asynchronous

Categories:

javascript, web

by

So, I have a piece of code which goes out and updates a list.  I’m using Ajax.Updater from Prototype.js, to get data back from the server. In my javascript, however, I’m immediately after kicking off the Ajax.Updater, doing processing based on the results from the update. And they’re out of sync, of course. It just …

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Nov 25

Upgrading rubygems on Ubuntu

Categories:

ruby, tips

by

Maybe it’s me.  Maybe it’s a feature of ubuntu, but on two separate systems, when I went to upgrade rubygems to the latest via gem update –system it didn’t work for me.  So, I had to go the more extreme route of: gem install rubygems-updateupdatee_rubygems This is mostly for my own reference, it’s not the …

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2 comments

Nov 18

Signs I’ve not had enough sleep

Categories:

idiocy

by

I just named a rails controller class ElmoController, because it gets invoked by a tickler…

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Nov 14

Concatenation Note to Self

Categories:

gotchas

by

To concatenate in PHP you use a ‘.’, not a ‘+’.  Likewise, you don’t use ‘.’ to reference an object’s members, you use ‘->’.  Move along, nothing to see.

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Nov 12

DIY Maps and Linux Firefox/Flash Quirks

Categories:

gotchas, javascript

by

First off, let me say that I really like DIY Map. It’s quick, and responsive, with an easy to use interface, as well as allowing you to make changes on the fly easily. That said, I discovered lastnight / this morning that there are some quirks with its updating through the Flash JavaScript Integration Kit. …

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Nov 11

YUI Datasources

Categories:

gotchas

by

Been a while since I’ve written.  I’ve been sick and working on a side project.  That said, I’ll be writing more…… Today’s note/reminder is a gotcha about YUI datasources.  If you have JSON feeding the datasource and you’re getting back more fields in the results than you’re expecting, the datasource will not behave properly.  For …

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Oct 20

New Favorite Pencils

Categories:

life hacking, miscellany, tools

by

I’m a stationary supply junkie.  I admit it.  I love pens, papers, notebooks….  I’ve just found a new favorite pencil.  Barnes & Noble has a small section of art supplies in a local store and one of the items they have are graphite stick pencils.  At first grasp, they feel a little heavy — about …

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