On Jul 6, 2010, at 11:56 AM, Brian Bockelman wrote: > HDFS does not support the full set of POSIX semantics. I suspect bonnie++ is > exercising things which HDFS doesn't support (such as writes to a file which > is already closed or seeks during writes).
In fact, I think the last time this came up a year or two ago, the
stack trace showed that iozone was blowing up on a call to truncate(), which is
definitely not supported.
