Hey Keith, The new API is still unstable, and we continue to support the 0.19 stable (old) API even in 0.23, but here is a good guide: http://www.slideshare.net/sh1mmer/upgrading-to-the-new-map-reduce-api [The first part, from Owen]
On Wed, Feb 8, 2012 at 3:20 AM, Keith Wiley <kwi...@keithwiley.com> wrote: > Would anyone recommend a good book or online resource that specifically > teaches the .20 API as opposed to the .19 API? It's several years old and > I've really dropped the ball on this one. > > As a followup...I'm mildly curious whether later versions (it's up to .23 I > believe) offer substantial differences in the Java (nonstreaming) coding > environment. Since the majority of my Hadoop heavy-lifting has used > streaming, I've never really honed my Hadoop Java skills. > > I say "mildly" because I'll probably be using Cloudera's distribution which > is .20, but I'm still curious how far behind my Hadoop skills are. As I've > admitted here, I've never really made a push to jump the .19/.20 divide. I'm > wondering if future chasms lie ahead as well. > > Thanks. > > ________________________________________________________________________________ > Keith Wiley kwi...@keithwiley.com keithwiley.com > music.keithwiley.com > > "What I primarily learned in grad school is how much I *don't* know. > Consequently, I left grad school with a higher ignorance to knowledge ratio > than > when I entered." > -- Keith Wiley > ________________________________________________________________________________ > -- Harsh J Customer Ops. Engineer Cloudera | http://tiny.cloudera.com/about
