You might post this same question to mapred-user@hadoop. I know Owen and Arun have done a lot of analysis of these kinds of things when optimizing the terasort. Others may have valuable feedback there as well.
Alan. On May 22, 2012, at 12:23 PM, Jonathan Coveney wrote: > I've been dealing some with the intermediate serialization in Pig, and will > probably be dealing with it more in the future. When serializing, there is > generally the time to serialize vs. space on disk tradeoff (an extreme > example being compression vs. no compression, a more nuanced one being > varint vs full int, that sort of thing). With Hadoop, generally network io > is the bottleneck, but I'm not sure of the best way to evaluate something > like: method X takes 3x as long to serialize, but is potentially 1/2 as > large on disk. > > What are people doing in the wild? > Jon
