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bizo developer blog: November 2011

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Bizo Open Source Code. Monday, November 21, 2011. SVG Charts, Done Right. Our initial requirements for a charting library seemed pretty simple:. An api that didn't force a developer to do mental gymnastics just to load in data. An html5/canvas charting library built ontop of Raphael ( http:/ raphaeljs.com/. That includes the following features:. Great looking defaults (see example below). Easy api that allows you to pass a normal 2d Javascript array of x,y points without the need to pad your x-labels.

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bizo developer blog: August 2013

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Bizo Open Source Code. Monday, August 26, 2013. We happily used Atlassian’s hosted OnDemand service for source code management with the following setup. Subversion: source control management. FishEye: source code browsing. Jenkins (hosted on EC2): continuous integration and periodic jobs (http:/ dev.bizo.com/2009/11/using-hudson-to-manage-crons.html). We switched on a Thursday morning with minimal developer interruptions, now we're on a new setup. Bitbucket: source control management and code browsing.

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bizo developer blog: February 2013

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Bizo Open Source Code. Monday, February 18, 2013. Map-side aggregations in Apache Hive. When running large scale Hive reports, one error we occasionally run into is the following:. Out of memory due to hash maps used in map-side aggregation. Currently hive.map.aggr.hash.percentmemory is set to 0.5. Try setting it to a lower value. i.e 'set hive.map.aggr.hash.percentmemory = 0.25;'. Let’s think about what the Hadoop job looks like with the canonical word count example. Of the number of rows read, the map-...

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bizo developer blog: April 2013

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Bizo Open Source Code. Monday, April 22, 2013. Do you like command-line scripting and one-liners with Perl. For instance, here's a Ruby one-liner that uppercases the input:. Echo matz ruby -p -e '$ .tr! You like that kind of stuff? Then I offer you a hacking idea for Scala. As you may know, Scala offers similar capability with the. Using a simple bash wrapper,. Usage: scala-map MAP CODE. Scalaio.Source.stdin.getLines map { $@ } foreach println. Ls scala-map .toUpperCase. Line` is bound to the current line.

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bizo developer blog: January 2012

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Bizo Open Source Code. Monday, January 30, 2012. Work at Bizo (looking for some good engineers). We’re a small, disciplined team that gets a lot done. Our platform processes billions of page views monthly and 100s of terabytes of data so we have lots of fun problems to tackle. We believe in teamwork and communication. We have customers, are well funded and recently named the forth fastest growing private company in the San Francisco Bay Area. If you're interested, please apply on stackoverflow. The first...

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bizo developer blog: February 2012

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Bizo Open Source Code. Friday, February 17, 2012. Building a Product in Just 8 Hours. Recently at Bizo, we decided to try a new kind of hack day. Previously during hackdays our engineers worked individually on their own project(s). But on our last hack day we decided to try something new – The 8 Hour Product Challenge. We decided to build a stealth product. The system would use Bizo’s rich business data to personalize special content for visitors based on things like their industry, company siz...8211; g...

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bizo developer blog: Efficiency & Scalability

http://bizo-dev.blogspot.com/2013/04/efficiency-scalability.html

Bizo Open Source Code. Friday, April 19, 2013. Software engineers know that distributed systems are often hard to scale and many can intuitively point to reasons why this is the case by bringing up points of contention, bottlenecks and latency-inducing operations. Indeed, there exists a plethora of reasons and explanations as to why most distributed systems are inherently hard to scale, from the. To scarcity of certain resources, e.g., RAM, network bandwidth, . Is the extent to which useful. Is the abili...

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bizo developer blog: September 2012

http://bizo-dev.blogspot.com/2012_09_01_archive.html

Bizo Open Source Code. Wednesday, September 26, 2012. Grouping pageviews into visits: a Scala code kata. I thought that the problem of grouping pageviews into visits would make an interesting. Here’s the statement of the problem that I worked from:. As a starting point, I decided to take a straightforward procedural approach:. Def doingItIteratively(pageviews: Seq[Long]): Seq[Seq[Long] = {. Val iterator = pageviews.sorted.iterator. Val visits = ListBuffer[ListBuffer[Long] (). For (currentPV - iterator) {.

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bizo developer blog: January 2013

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Bizo Open Source Code. Wednesday, January 23, 2013. Asanban: Lean Development with Asana and Kanban. On Bizo's External Apps team (aka. 'xapps'), we've been using a Kanban system to manage our work. All of Bizo Engineering uses Asana to track tasks, which isn't specifically designed for Kanban. We've settled on a set of of conventions that we use in Asana which enable our Kanban system. These conventions also help us to track metrics like the average lead time from month to month. The first order of busi...