apache/incubator-spark — pull request #399 by pwendell (2014-01-13 03:26:50+00:00)
Title: Disable shuffle file consolidation by default

After running various performance tests for the 0.9 release, this still seems to have performance issues even on XFS. So let's keep this off-by-default for 0.9 and users can experiment with it depending on their disk configurations.