On Jul 7, 2010, at 2:56 AM, Christian Baun wrote: > Hi Brian, > > I wanted to test HDFS against several distributed filesystems. > > Do you know any popular performance benchmarks that run with HDFS? >
I can't think of anything off the top of my head. Any ideas out there on the list? The issue is that HDFS is not very much like a distributed file system. Maybe a good way is to do one of the MapReduce-based Test IO benchmarks on top of HDFS versus Lustre versus GPFS, etc? Brian > Best Regards, > Christian > > > Am Dienstag, 6. Juli 2010 schrieb Allen Wittenauer: >> >> 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. >
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