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TCP Delays and Retransmissions on Illumos

The other day, I helped debug an issue on some production Joyent Cloud servers (which use SmartOS, based on Illumos, the open-source successor to Solaris). The solution turned out to be so non-obvious, and the cause pretty interesting, so I thought it was worth writing up.

The New Rubygems Index Format

This post is a part news, part technical documentation, and part request for comment. I’m going to explain the technical nitty-gritty details of the planned next generation index that allows Bundler and Rubygems to know what gems exist and how to install them.

Detached—Terminals that Don't Die when You Close them!

Detached is a tool for Macs that makes it easier to manage command-line processes running in the background. Developers spend a lot of time running commands and servers in terminal windows, but closing each window means closing the process running in it. Wouldn't it be great to be able to keep programs running even after their windows are closed?

How to be an ally

So I titled this “How to be an ally,” but that’s a lie. You can’t be an ally. No one can. Ally-ness isn’t something that you can have intrinsically, any more than you can inherently be kindness, or rudeness. You can do ally actions. So probably a better name for this is How To Do Ally Work. But I’m getting a bit ahead of myself.

Extreme Makeover: Rubygems Edition

Bundler, Rubygems, and are vital infrastructure that every Rubyist uses just about every day. Over the last year, that infrastructure has seen a huge amount of change. This is an overview of the changes, an update on where things are now, and an explanation of where we’re going soon.