Ben Kudria - Weblog

SC08 Wrap-up

Ben — Fri, 21 Nov 2008 01:01:03 -0600

SC08 is over for this year. The competition ended oﬃcially 4PM Friday. We ended up stopping the RAxML job we were running for 40 straight hours; it didn’t look like it was going to ﬁnish at all. In the end, we didn’t complete a single dataset.

The Taiwanese team from Tsing Hua University did help us improve our HPC score signiﬁcantly, though. Some of their team captains came over and helped us tweak our build scripts, and, after rerunning the benchmark, our GLOPS improved from 16 to 205. That’s a huge improvement for some minor tweaking, but you have to know exactly what to change. The Taiwanese team had the expertise, and our team was very grateful to them for it.

After the competition ended, the organizers took us to a bowling alley/arcade/Laser Tag/rock climbing place. Laser Tag was fun (our team won!) but the rock climbing was the best.

We spent Thursday hanging out in our booth, explaining our setup to anyone who wandered past, and generally beginning to pack up. The Purdue team had Lance Armstrong’s team power their cluster with bikes while they ran a computation, but I slept through it.

The awards ceremony started at 1:30. I predicted the Taiwanese team would win, but the combined Indiana University and Technische Universität Dresden team won - big congrats to them. They spent a lot of time carefully tuning their applications, and they were very well prepared.

After some great BBQ tonight, we’re on our way home tomorrow morning - overall, it’s been a fun week. Austin is a really fun city, and the weather down here is excellent. SC09 is in Portland, Oregon, next year, perhaps I’ll be there as well.

SC08 - Day 2

Ben — Mon, 17 Nov 2008 10:59:11 -0600

After setup yesterday, we returned to the Hotel at 2AM. I slept for 3.5 hours, and then went back to the convention center for the start of the competition. We’re having some network trouble, but not anything that would be unworkable.

Our situation is much worse than last year.

A couple of months ago, one group from MIT asked if I wanted to assist their team in the competition. They had some plans for using GPUs from ATI to build a cluster. I wasn’t so sure about that idea, but of course I was open to helping. A bit later, the ﬁrst person I spoke to connected me with our current advisor, Kurt. Kurt told me the GPU thing fell through, and they were going to go with a similar conﬁguration to the one that Stony Brook had last year at SC07. I agreed, I never liked the GPU idea.

MIT also agreed to cover everything for two more non-undergrad advisors from Stony Brook (only undergrads can compete). We also had minimal remote access to the similar hardware - we were only given hardware the morning we arrived.

At our arrival in Austin, we discovered the entire MIT team had bailed. There were some politics involving a $30 billion NSF grant, the GPUs, and what seems like inter-research group politicking at MIT. As a result, I was the MIT team. Our two SBU advisors would have to leave the booth once the competition started.

Fortunately, we able to snag two members from our team from last year; they were at the conference to help organize and assist in other parts, but we were able to have them join the team. So, I’m not the only MIT team member any more, but the entire MIT team is composed of SBU students. The only MIT person here is our advisor. In fact, the team is almost the same team we had last year.

We are not doing to well on the hardware front either. Last year, we had 12 nodes with dual quad-core Xeons. This year we have 4 nodes with dual quad-core Opterons. This is about a third of the conﬁguration from last year. the other teams have crazy setups that far outpower ours. All this, combined with a prep time of exactly one day (compared to the Indiana + Dresden teams’ 4 months) we aren’t likely to accomplish much this time around.

Bummer.

I am looking forward to all the post-competition parties, though.

SC08 in Austin, Texas

Ben — Sat, 15 Nov 2008 06:40:13 -0600

I’m leaving my comfy abode for Austin, Texas this morning, to help the MIT team with their cluster in the SC08 Cluster Challenge. Stony Brook isn’t participating this year but a couple of months ago the MIT team contacted me about the possibility of helping this year. I’ll be taking photos and writing more as more interesting things happen: stay tuned!

Re-evalution on the political compass

Ben — Thu, 30 Oct 2008 00:14:56 -0500

The recent kerfuﬄe with the economy, as well as that election everyone is speaking about, prompted me to do some more serious think on my own political stances. I recently re-evaluated myself on the Political Compass, and my positions seemed to have shifted slightly. About 1.5 years when I started this site, I was Libertarian Left (i.e. a social Libertarian and Left economically) but retaking the test has put me slightly into the right on the economic scale, and slightly more Libertarian socially. So I’ve updated the About page to re-classify myself as Libertarian Right. Perhaps in a year or so I’ll re-evaluate again and see how I shift.

Visiting Boulder, Colorado

Ben — Tue, 28 Oct 2008 02:04:45 -0500

Several hours from now I will ﬂy out of JFK Airport, destination, Boulder, Colorado. I’m visiting Boulder for a few days courtesy of all the companies listed over at Boulder.me. A group of companies out in Boulder pooled their funds to sponsor 100 developers for an all-expenses paid visit to Boulder. I plan on exploring Boulder and meeting with all the companies listed, hopefully securing some oﬀers for a summer internship for 2009. I have my eyes on Gnip, but a few of the other companies look interesting too.

I plan on taking plenty of pictures of beautiful Boulder, so stay tuned and watch my Flickr feed.

(There are also some rumors ﬂoating around about SC08. More on those later!)

About My Summer at The New York Times

Ben — Thu, 11 Sep 2008 21:22:32 -0500

I spent this summer programming for the New York Times. The experience was valuable in quite a number of ways, and I really enjoyed myself. Here’s how it went down.

Sometime in March, I saw a post on the Times’ Open Blog, a blog dedicated to technical topics, and written by developers - not suits. The post I noticed explained how the development group in the Times was looking for several technical interns for the summer. I decided to apply, and I emailed the provided address with my resume and some more information. The blog post explained that, in order to help the recruiting team decide on a candidate, any applicants should provide a short explanation of a new idea the Times might implement. My submission is reproduced below.

One thing that I think has been lost in the transition from print newspapers to online news is the collection of newsboys on city streets shouting the headlines of breaking news. However, blasting breaking news to everybody is crude, annoying, and expensive - with the Internet, we can do better. I’d love to be able to subscribe to some sort of SMS service, Twitter bot, or somesuch to deliver breaking news directly to me, as it happens, unobtrusively.

Problems include:

obtaining feedback for training the relevancy ﬁlter

determining which is breaking news (“beta” users get news ﬁrst?)

infrastructure (how can we decentralize?), and

revenue model (if any).

Current trends include:

the ‘breakingnews’ Twitter bot

Google News’s analysis, and

RSS readers of all kinds.

Personalization options:

the aforementioned relevancy ﬁlter

personal stock alerts

keyword alerts, and

presence management.

I think this is a relatively unexplored area, an interesting problem, and a useful tool for news consumers and producers/creators/publishers.

Unfortunately, I didn’t get to work on anything related to this at all.

I had applied to several other companies, but after a pretty technical phone interview from my future boss Elizabeth Baron, the Times made me an oﬀer.

I had several reasons for accepting the oﬀer from the Times. First, the Times has a very large and performant website, and I was intrigued about how they solve their scaling problems (a CDN, internal load balancers, plenty of hardware, a MySQL access layer, and some other things). Second, the technologies used by the Times (Linux, Apache, MySQL, PHP, SVN, and other Free/Open Source software) were a perfect match to my expertise, and I had a very easy time getting started. Finally, I was impressed by the freedom given to developers at the Times. In retrospect, the Times seems to have an eﬃcient development group for its size, and at the start of the summer I noticed several signs that clued me in to this (Agile/XP practices, an SCM system, generous use of external libraries and software, and transparency of development with, e.g. the Open blog).

So, what did I work for 3 months? Nominally, one REST API and an application that uses it, but, in reality, several things. My (and my fellow interns’) main project was to create an online submission form for Wedding Announcements to be published in the Style Section of the Sunday Edition. In addition to the public-facing submission form, there was a back-end database and ﬁle storage infrastructure, a REST service that re-exposed the information internally, and an internal application that allowed editors, reporters, writers, fact-checkers, and a myriad of other people to collaborate and collectively create a story about the wedding.

The project was written in PHP, with the data stored in MySQL, cached in memcached, and photos were stored on the ﬁlesystem. However, over the course of the project, I ended up using Amazon’s S3 an EC2 Web Services as well. I had never worked with AWS before, and I was amazed at how easy it was to have my managers agree to oﬄoad a pretty signiﬁcant part of our functionality to Amazon’s servers. I ended up learned a lot about S3 and EC2!

Another valuable learning experience came from creating the REST API. Our API implemented all the details of REST (as opposed to being a simple read-only API) and combined textual data as well as binary photos. Building this API forced me to learn about all the implementation issues with REST, and I actually had the opportunity to make some improvements to the internal REST framework used by all the NYTimes.com APIs. I wasn’t given direct commit access, but my patches were reviewed and incorporated quickly after they were ready.

I also got a chance to hack on some other cool things. For example, I installed a Jabber server on an internal box, and I wrote a small Ruby bot that would let all the interns and other people working on the Weddings project know whenever there was a commit made to our module. That was a fun little script to hack on!

The development team is pretty well structured at the Times. Everyone I interacted with knew their domain quite well, and there was plenty of communication between teams. My meetings were informative and short, and I had no problems getting my questions about the internal setup answered. My boss and the other managers were helpful in connecting me to the people I needed to talk to, and guiding the scope of the project. Our team met once a week and reviewed all the tasks that we had worked on, and an internal install of XPlanner helped keep us all on task. Most everyone in the department simply used GMail, Google Calendar, and AIM or Jabber/Google Talk to communicate, so I ﬁt right in.

The working environment was top-notch - mostly because I simply provided most of it myself. I brought in my laptop every day, and I used my own keyboard (the excellent Das Keyboard, much better than the ﬂimsy mushy Dell keyboards that are provided by default). I could have of course used the provided PC, but working on my laptop (with their external monitor) was much better for me, and I didn’t have to install Linux on their desktop machine.

By the end of the summer, I was reluctant to leave (the Times and my East Village apartment paid for by the Times), but I was grateful for the incredible learning experience. I learned all about S3 and EC2, all the intricacies of REST, and more about the internal quirks of PHP than I ever wished to know. I helped build an application and API that utilized all the internal infrastructure of the Times, including the Linux servers, the database access layer and caching mechanism, the web server, and the PHP libraries, so I became familiar with the total infrastructure used to serve the extremely popular NYTimes.com. All the technologies and techniques I learned were helpful and interesting.

I look forward to applying everything I learned in future internships and jobs, and I consider this summer spent in New York City one of the funnest experiences I’ve had.

This post has also been cross-posted at the Open blog: “Summer Internship Wrap-up”.

Quick Shell Tip: Find empty lines after closing PHP tags

Ben — Thu, 17 Jul 2008 16:52:21 -0500

If you’re using PHP to output XML, and you have empty lines outside of your <?php and ?> tags, you may insert empty lines before your opening XML tag - a big no-no. Apparently, that invalidates XML.

To detect this, use this Bash code in a directory of PHP ﬁles:

for file in `find -type f -name "*.php"`; do lines=$((`wc -l ${file} | cut -d' ' -f1`+1)); pos=`grep -Hn '?>' ${file} | cut -d: -f2`; `(($lines != $pos ))` && echo $file ; done

Disclaimer: I wrote this code while in an unnatural state (who ever is?). It may break your code, impregnate your cat, cause your baby sister to fall madly in love with your microwave, or really, anything else. It even might (deﬁnitely) fail to check for newlines before you opening <?php tag! And it’ll complain if you don’t have a closing ?> tag (you’d be surprised how … inconsistent people may be). Anyway, don’t complain to me.

The Death of Postmodernism And Beyond

Ben — Tue, 24 Jun 2008 09:35:00 -0500

“In postmodernism, one read, watched, listened, as before. In pseudo-modernism one phones, clicks, presses, surfs, chooses, moves, downloads. There is a generation gap here, roughly separating people born before and after 1980. Those born later might see their peers as free, autonomous, inventive, expressive, dynamic, empowered, independent, their voices unique, raised and heard: postmodernism and everything before it will by contrast seem elitist, dull, a distant and droning monologue which oppresses and occludes them. Those born before 1980 may see, not the people, but contemporary texts which are alternately violent, pornographic, unreal, trite, vapid, conformist, consumerist, meaningless and brainless (see the drivel found, say, on some Wikipedia pages, or the lack of context on Ceefax). To them what came before pseudo-modernism will increasingly seem a golden age of intelligence, creativity, rebellion and authenticity. Hence the name ‘pseudo-modernism’ also connotes the tension between the sophistication of the technological means, and the vapidity or ignorance of the content conveyed by it – a cultural moment summed up by the fatuity of the mobile phone user’s “I’m on the bus”.”

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Tags: for:blog, philosophy, post-modernism, modernism, psuedo-modernism, realism

Hosting Git repositories, The Easy (and Secure) Way

Ben — Tue, 10 Jun 2008 09:30:00 -0500

How to host Git repositories on your Linux server, easily, with the gitosis tool. Good guide, and thorough walkthrough.

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Tags: git, repository, host, linux, debian, ubuntu, server, for:blog

Quality Without A Name

Ben — Sun, 08 Jun 2008 23:07:00 -0500

Excellent piece on the proper way to design software.

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Tags: quality, design, software, programming, for:blog

No More TrackBacks

Ben — Wed, 04 Jun 2008 16:22:45 -0500

I’ve turned oﬀ trackbacks for the site. I was getting large amounts of spam, and very little signal. Although my blog is pretty unknown, and doesn’t have a lot of visitors, the amount of spam was monumental - I don’t want to have to deal with it in the future. Also, the value was not very helpful. I have a couple of RSS feeds tracking mentions of my name and blog, so I’ll deﬁnitely know when someone writes about me. Like SMTP, TrackBacks are inherently broken - both were not designed with Evil in mind. So, until something better comes along (because, the idea is great) your only method of replying is by either composing an entry on your own blog, and leaving a comment here with a link (preferred) or, simply, leaving a comment with your reply. Whatever ﬂoats your boat.

10 Examples of Beautiful CSS Typography and how they did it…

Ben — Wed, 04 Jun 2008 15:14:00 -0500

Excellent detailed analysis and description of CSS and type design techniques used to create some great web type.

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Tags: css, type, design, web, font, times, for:blog

21 Ruby Tricks You Should Be Using In Your Own Code

Ben — Tue, 27 May 2008 13:41:00 -0500

A whole bunch of cool Ruby tricks I didn’t know. Deﬁnitely worth a read!

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Tags: ruby, tricks, idiom, programming, for:blog

The New York Times and The Death Of Old Media

Ben — Mon, 26 May 2008 19:35:47 -0500

Seeing as how I’m going to be working for the Times this summer, I’ve put in a bit of thinking about the role of news, newspapers, and journalism in today’s hyperconnected world. The death of paper newsletters has been predicted for a while now, but strangely enough, they are still around. Wired Magazine, in their 15-year anniversary retrospect, highlighted one of their unfulﬁlled visions: “The Death of Media”. Wired called for the death of “Old Media” over and over again, but Old Media is still around, and rumors of their death are exaggerated…for now.

The physical medium of a newspaper is convenient for a lot of people - mostly the older generation that is used to physical paper. But, as the younger generation takes control, the physical medium, I think, will die a quick death. Then, what is a newspaper, without the paper? Well, a team of trained journalists and editors who provide really high quality content, and some more.

Well, what, exactly? When any blogger can provide “news”, the Times does have some competition. What can their team of reporters and editors accomplish? That sort of concentrated talent can really focus on all eight of the “Better Than Free” generatives listed by Kevin Kelly (founding editor of Wired). At this point, the paper version of the Times already provides:

Interpretation - The Times always has excellent commentary by informed experts.
Authenticity - Who are you going to trust more: Joe Schmoe Blogger, or, the Times? No contest.
Findability - Any edition of the Times is packed with content you probably aren’t interested in, but there are certainly gems you don’t know you care about. Finding those is really valuable.
Embodiment - Some people will pay for a thick heavy paper copy of the Sunday Edition, so they can lounge around all day, and just work their way slowly through all the stories. Let them eat cake.

What about the other four? Well, the online version of the Times, nytimes.com, fulﬁlls these, but there is room for improvement:

Personalization - my.nytimes.com covers this, although I’m not quite satisﬁed with the implementation. This is a Hard Problem however, so I can’t fault them.
Accessibility - This is a relatively simple solution with the appropriate technologies, and a proper API (see below)
Patronage - Don’t mistake this for a subscription. If the content is free, but readers have the opportunity to pay a small amount after reading a story they really enjoyed, the feeling is completely diﬀerent. And the Times gets real, valuable feedback, to boot.
Immediacy - no argument: nytimes.com can present news a lot faster than a dead-tree edition. Not just over the Web to your computer, but to your phone, or to any other systems where you need it.

What caught my eye recently is the announcement that the Times will provide an API - a programmatic way to get access to their stories, ratings, and other structured content. This is a great move, because it allows anyone to use the free data, and it proves the Times gets it - anyone should have access to the data, because only the Times can provide the added value of Kelly’s generatives.

(Strangely enough, I couldn’t ﬁnd an oﬃcial announcement for the API - not on open.nytimes.com, not on code.nytimes.com, and not on Google: “nytimes api” leads back to the ReadWriteWeb article.)

What would really rock my boat is for the Times to integrate Reuters’ OpenCalais semantic web application - giving access to the data to programmers (via the API) is a good thing, but the machines need access too. OpenCalais takes unstructured text (such as a Times article) and returns RDF-structured semantic data consumable by web crawlers and information agents.

All this progress is exciting, and I hope to get a glimpse of more eﬀorts this summer. I start next week, and while I may be working on something else, I’ll keep a close eye on anything going on in this space.

Semester close, and Summer Internship

Ben — Wed, 21 May 2008 01:03:07 -0500

Whew! My ﬁnal exam (Algorithms) is done, and the semester is over! It was lots of fun, (except for Physics) and lots of work (mostly, Physics), and I’m glad it’s over. Next semester promises to be lots of fun: highlights include Artiﬁcial Intelligence, Communication and Networks, and Software Engineering. That last one might be interesting. While I’ll have to draw endless UML diagrams, the Professor will also let use something other than Java (ﬁnally!) to write our web app, so I plan on using the opportunity to learn Ruby on Rails. About time. Anyway, looking forward to next semester, but until then, I have the whole summer.

So, a while back, I applied to a couple of places, in search of a summer internship. I spoke with VMWare, Google, The New York Times, and a few lesser-known places. I applied to the Times’ Summer Internship Program, and after a great interview, I accepted - dropping midway out of the VMWare interview, and turning Google away outright (I might have went to Google if they hadn’t lost my ﬁrst application, and the second later oﬀer was as attractive as the ﬁrst). So, this June and July I’ll be working with some talented people on the Platforms team for NYTimes.com, working on … something. They haven’t told me what, exactly, yet. But, I’m convinced it’ll be fun. As a perk, they are even paying for a place for me on Manhattan, in some NYU dorms. Future things I’m allowed to reveal about the internship and The Times will be found on the NYTimes topic page.

Distributed programming with Jabber and EventMachine

Ben — Tue, 06 May 2008 03:09:00 -0500

Hooking up Jabber and EventMachine for remote command queuing, IPC, and other distributed programming hijinks. Crazy, and cool.

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Tags: ruby, jabber, xmpp, smpp4r-simple, eventmachine, distributed, for:blog

Learning Perl

Ben — Tue, 06 May 2008 00:27:11 -0500

I’m back to posting here after a long hiatus, mostly because I have something interesting to report. I’ve been avoiding/neglecting this site because I’ve been incredibly busy with schoolwork, but everything is getting more leisurely in a calm-before-the-ﬁnals sort of way.

Anyway, I have in front of me the thick (1k pages) 3rd edition of O’Reilly’s “Programming Perl”, graciously lent, because at some point, that’s what I hope to do. In preparation for this summer (more on that later) I hope to work my way at least partly through this tome, and in the process, hopefully post some reactions to the language as I go.

I guess I’d better be upfront about my prejudices and preconceptions: from what I’ve seen, I don’t think I’ll like Perl. I have a distaste for extraneous punctuation (eg, I try to leave parens and such oﬀ as much as I can when coding in Ruby, and I consider Ruby’s @variable an oﬀense to the eye and sensibilities), and from what I’ve seen from Perl, it has plenty of extra $(%]&*# to annoy the hell out of me. I imagine I won’t like the lack of turtles-all-the-way-down OO that Ruby has, and I think the general lack of cohesiveness and cobbled-together inelegant TMTOWTDI messiness won’t sit with me well either. But hey, I’d love to be shown wrong – two favorite languages are better than one!

So, in general, expect some more activity at this place, and especially some more Perl posts.

Luminaries look to the future web

Ben — Mon, 05 May 2008 19:58:00 -0500

BBC interviews 10 prominent web community individuals for their reaction on the past 15 years, and their predictions for the next 15.

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Tags: web, www, internet, semantic web, for:blog

Up or Out: Solving the IT Turnover Crisis

Ben — Thu, 01 May 2008 02:01:00 -0500

Applying the Cravath System to the IT Industry

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Tags: it, it industry, turnover, google, cravath system, cravath, for:blog

Drupal Modules - Search, Rate, and Review Drupal Modules

Ben — Tue, 18 Mar 2008 09:20:00 -0500

A third-party front-end to the huge collection of Drupal modules out there, with ﬁne-grained ratings, reviews, and more. About time!

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Tags: drupal, modules, drupal module, rating, review, for:blog, via:bmoreinis

UNIX tip: chmod's +X option

Ben — Mon, 17 Mar 2008 20:11:52 -0500

UNIX tip: from chmod(1): “The letters ‘rwxXstugo’ select the new permissions for the aﬀected users […one option is:] execute only if the ﬁle is a directory or already has execute permission for some user (X)”. That is, when, for whatever reason, you’ve got a whole tree of ﬁles and directories, and you can’t enter some number of sub-directories because their execute bit isn’t set, you can either execute chmod -R u+x my_dirs, or, you can (now) execute chmod -R u+X my_dirs. The former will make all the ﬁles executable (Bad™) while the latter will make only directories enterable (or, otherwise-executable ﬁles executable for you). Handy to know.

Programming Languages study

Ben — Fri, 14 Mar 2008 01:03:00 -0500

A survey of quite a number of programming languages, includes analysis of classiﬁcation, syntax, and scriptability. Extensive.

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Tags: programming, code, languages, programming languages, syntax, survey, for:blog

A better backup system based on Git

Ben — Fri, 07 Mar 2008 00:09:00 -0600

“A fast, powerful backup system built upon Git and eﬃcient, compact tools written in OCaml (faster than the C counterpart with 1/5th of the code :)”

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Tags: ocaml, git, backup, eigenclass, for:blog

Pi is wrong

Ben — Sun, 02 Mar 2008 20:39:00 -0600

Interesting paper on the error of assigning π to it’s current value. Abstract: “Mathematicians often stress the importance of clear, evocative, natural, succinct notation for important concepts. Most of our uses of π are in the combination 2π, by which we are repeatedly saying ‘twice half the circumference of the unit circle.’ By associating the primary symbol for such an important mathematical concept with the correct value in the ﬁrst place, a lot of unusually meaningless ink would have been saved, and quite a bit of additional clarity would have been achieved.”

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Tags: pi, math, article, interesting, for:blog

Consumer Reports' Secret Shoppers Have Lots of Explaining to Do

Ben — Thu, 28 Feb 2008 04:06:00 -0600

“Working as a secret shopper for Consumer Reports requires not only persistence and attention to detail, but also a knack for creative explanations to eyebrow-raising purchases.” An examination of CR’s “secrte shoppers” - reviewers require to purchase items in bulk without exposing their goal. Imagine trying to explain buying 5 diﬀerent washing machines at once.

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Tags: consumer reports, wired, cr, review, secret shopper, for:blog

GitTorrent Protocol RFC

Ben — Thu, 28 Feb 2008 02:35:00 -0600

Cool: “This document describes the GitTorrent Protocol version 0.1, referred to as “GTP/0.1”. The GitTorrent Protocol (GTP) is a protocol for collaborative git repository distribution across the Internet. It is best classiﬁed as a peer-to-peer (P2P) protocol, although it also contains centralized elements.”

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Tags: git, bittorrent, p2p, decentralization, repository, scm, torrent, for:blog