El 5/7/2011 8:53 PM, [email protected] escribió:
Hi guys,I have a cluster of 16 machines running Hadoop. Now I want to do some benchmark on this cluster with the "nnbench" and "mrbench". I'm new to the hadoop thing and have no one to refer to. I don't know what the supposed result should I have? Now for mrbench, I have an average time of 22sec for a one map job. Is this too bad? What the supposed results might be? For nnbench, what's the supposed results? Below is my result. ================ Date& time: 2011-05-05 20:40:25,459 Test Operation: rename Start time: 2011-05-05 20:40:03,820 Maps to run: 1 Reduces to run: 1 Block Size (bytes): 1 Bytes to write: 0 Bytes per checksum: 1 Number of files: 10000 Replication factor: 1 Successful file operations: 10000 # maps that missed the barrier: 0 # exceptions: 0 TPS: Rename: 1763 Avg Exec time (ms): Rename: 0.5672 Avg Lat (ms): Rename: 0.4844 null RAW DATA: AL Total #1: 4844 RAW DATA: AL Total #2: 0 RAW DATA: TPS Total (ms): 5672 RAW DATA: Longest Map Time (ms): 5672.0 RAW DATA: Late maps: 0 RAW DATA: # of exceptions: 0 ============================= One more question, when I set maps number to bigger, I get all zeros results: ============================= Test Operation: create_write Start time: 2011-05-03 23:22:39,239 Maps to run: 160 Reduces to run: 160 Block Size (bytes): 1 Bytes to write: 0 Bytes per checksum: 1 Number of files: 1 Replication factor: 1 Successful file operations: 0 # maps that missed the barrier: 0 # exceptions: 0 TPS: Create/Write/Close: 0 Avg exec time (ms): Create/Write/Close: 0.0 Avg Lat (ms): Create/Write: NaN Avg Lat (ms): Close: NaN RAW DATA: AL Total #1: 0 RAW DATA: AL Total #2: 0 RAW DATA: TPS Total (ms): 0 RAW DATA: Longest Map Time (ms): 0.0 RAW DATA: Late maps: 0 RAW DATA: # of exceptions: 0 ===================== Can anyone point me to some documents? I really appreciate your help :) Thanks, stanley
You can use these resources: http://www.michael-noll.com/blog/2011/04/09/benchmarking-and-stress-testing-an-hadoop-cluster-with-terasort-testdfsio-nnbench-mrbench/ http://answers.oreilly.com/topic/460-how-to-benchmark-a-hadoop-cluster/ http://wiki.apache.org/hadoop/HardwareBenchmarks http://www.quora.com/Apache-Hadoop/Are-there-any-good-Hadoop-benchmark-problems Regards -- Marcos Luís Ortíz Valmaseda Software Engineer (Large-Scaled Distributed Systems) University of Information Sciences, La Habana, Cuba Linux User # 418229 http://about.me/marcosortiz
