> Yes, iozone does support threading. Here is a test with a record size of > 8KB, eight threads, synchronous writes, and a 2GB test file: > > Multi_buffer. Work area 16777216 bytes > OPS Mode. Output is in operations per second. > Record Size 8 KB > SYNC Mode. > File size set to 2097152 KB > Command line used: iozone -m -t 8 -T -O -r 8k -o -s 2G > 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. > Throughput test with 8 threads > Each thread writes a 2097152 Kbyte file in 8 Kbyte records > > When testing with iozone, you will want to make sure that the test file is > larger than available RAM, such as 2X the size. > > Bob
OK, I ran it as suggested (using a 17GB file pre-generated from urandom) and I'm getting what appear to be sane iozone results now. Do we have a place to compare performance notes? thx jake _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
