Links

Slide Deck Link: The Architecture of the Morrison’s OrderPad

Screenshot of slide from slide deck

http://martinfowler.com/articles/orderPad/

This is a slide deck (itself a neat little web application) detailing the architecture of a large scale web application and the design decisions made along the way.

From the slide deck

Morrisons OrderPad is a tablet web-application that helps staff in supermarkets place orders for new stock as they walk around the store. The resulting application makes a good expositional architecture for a tablet web application backed by a lightweight java server application. We highlight the separation of application control and DOM interaction on the client, using small, focused frameworks on the server, the broad-stack testing environment, and the use of a pilot project to understand what features were needed.

Link: Command-line tools can be 235x faster than your Hadoop cluster

Bash symbol

http://aadrake.com/command-line-tools-can-be-235x-faster-than-your-hadoop-cluster.html

What I find funny is how he goes from this intermediate step:

cat *.pgn | grep "Result" | sort | uniq -c

To this intermediate step in one shot.

cat *.pgn | grep "Result" | awk '{ split($0, a, "-"); res = substr(a[1], length(a[1]), 1); \
if (res == 1) white++; if (res == 0) black++; if (res == 2) draw++;} \
END { print white+black+draw, white, black, draw }'

This is what I refer to as “knowing your business”.