Category Archives: Technology

StackOverflow DevDays Boston 2009, Morning

Boston DevDays kicked off a month-long tour of technical talks aimed at programmers, organized by StackOverflow and Carsonified. I had the good fortune to attend, meet a few interesting people and see some fun talks. I tried to write a bit in real-time (search Twitter here) but the WiFi was pretty over-subscribed and there was no cell coverage to speak [...]

On implementing Chord

The Chord protocol dynamically constructs robust and scalable overlay networks that map a given key to an active node. The MIT PDOS Chord implementation has served as a reference implementation of Chord, and over the years has accumulated many tweaks and improvements. While the theoretical highlights have largely been documented in our publications, [...]

Mobile virtualization demonstration at VMworld

At today’s VMworld keynote, CTO Steve Herrod included a brief demonstration of the project that I have been working on at VMware since last May: the Mobile Virtualization Platform (MVP). One of the downsides of working in industry as opposed to academia is that you have to wait for big release dates such as [...]

Capacity planning for cell phone networks

The New York Times has an article today about how the inauguration crowd will test cellphone networks. They wrote:

Sprint Nextel, which said it had been planning for the inauguration since April, has also increased capacity of its cell sites and terrestrial transmission lines to prepare the network to sustain 10 to 15 [...]

Web tools I wish I had at work

Most companies keep resources associated with on-going but as-yet-unreleased projects hidden from public view. Working at a big company has made me realize that many tools for organizing various bits of data, that I took almost for granted as a grad student, are not available inside the firewall. Here are just a few:

delicious, for [...]

Twitter had no rate limit for failed authentication

Reading the Wired writeup on the Twitter password hack, I’m incredulous to read that there was no rate limiting on failed authentication. Given Twitter’s stringent rate limiting for API requests, this seems surprising. Not to mention that online password attacks are practically older than time. Fortunately,

As for addressing the security [...]

MoinMoin sub-page linking is confusing

MoinMoin supports sub-pages, which is a great thing for organizing the lots of wiki-pages. However, the way you write links violates the principle of least surprise: to specify an absolute link, you simply write the target name (e.g., HelpOnLinking), but to specify a relative link to a sub-page, you prepend the sub-page name with [...]

Porting social networks into FriendFeed

The other day, I complained on Twitter that it was impossible to check-in occasionally to see what people I know had been up to, and separate all that activity out from the prolific people that I’ve followed just because they occasionally say interesting things. And just to prove that fact, I totally missed the [...]