Hi,
I installed a small Hadoop-Cluster with Cloudera CDH3.
2 Server are running. One is running the NameNode and DataNode. The other
server is just a DataNode.
A dedicated Client exists too.
I want to run some performance tests with bonnie++ and iozone.
bonnie++ works but when I start iozone, it interrups.
Is this a known issue?
$ mount | grep hdfs
fuse_dfs on /hdfs type fuse.fuse_dfs
(rw,nosuid,nodev,allow_other,default_permissions)
$ iozone -Rac -g 3584M -f /hdfs/testfile | tee -a /tmp/iozone_results.txt &
[1] 6283
had...@ip-10-243-13-191:/home/ubuntu$ Iozone: Performance Test of File I/O
Version $Revision: 3.308 $
Compiled for 32 bit mode.
Build: linux
Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
Al Slater, Scott Rhine, Mike Wisner, Ken Goss
Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy,
Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root.
Run began: Tue Jul 6 16:40:35 2010
Excel chart generation enabled
Auto Mode
Include close in write timing
Using maximum file size of 3670016 kilobytes.
Command line used: iozone -Rac -g 3584M -f /hdfs/testfile
Output is in Kbytes/sec
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random
bkwd record stride
KB reclen write rewrite read reread read write
read rewrite read fwrite frewrite fread freread
64 4write: Invalid argument
Error writing block 0, fd= 3
iozone: interrupted
Best Regards,
Christian
