15 G single Gzip files? Consider block sizes in 0.5 GB+. But it also depends on the processing slot-power you have. Higher blocks would lead to higher usage of processing capacity, although with higher load to the NameNode in maintaining lots of blocks (and replicas per) per file.
On Thu, Mar 17, 2011 at 2:27 PM, Lior Schachter <li...@infolinks.com> wrote: > Hi, > We plan a 100T cluster with M/R jobs running on 15G gzip files. > Should we configure HDFS block to be 128M or 256M. > > Thanks, > Lior > -- Harsh J http://harshj.com
