Will do, thanks 2012/5/22 Alan Gates <ga...@hortonworks.com>
> 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 > >
