Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 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, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Wed Jul 8 22:05:52 2026 Auto Mode Machine = Linux oleg252-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg252-client.virtnet/iozone-file 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 4 7333 9756 688639 492717 64 8 13900 20088 831569 1163036 64 16 6963 64515 1188789 852702 64 32 12580 58017 1255511 1119387 64 64 8192 108642 1255511 451299 128 4 6512 19701 1185654 360605 128 8 9835 24358 1521718 978253 128 16 15278 55843 735635 859260 128 32 12324 86371 1281909 1217930 128 64 17508 98530 1391557 1196221 128 128 18427 133490 1231904 2920861 256 4 10219 12905 944525 533190 256 8 7084 20065 257318 644965 256 16 18330 39226 1312954 331524 256 32 31932 38049 1262029 1099237 256 64 20707 59481 928195 555248 256 128 41510 135167 1455317 1479379 256 256 46444 98311 1471270 2000242 512 4 9770 12441 562638 358822 512 8 13692 28731 689222 756474 512 16 30013 53550 462042 1140576 512 32 48196 53422 1060063 754083 512 64 35558 64949 541773 1242177 512 128 39309 118850 836636 1336492 512 256 35834 129649 1734911 1589779 512 512 55502 91970 1492545 2256220 1024 4 11566 13892 881415 286277 1024 8 25001 26142 365193 312775 1024 16 32350 31200 963255 922695 1024 32 46385 71763 1466957 1219189 1024 64 37370 83435 1097669 820463 1024 128 51714 121111 1129123 993330 1024 256 57261 168365 1166221 862650 1024 512 55085 88414 1514549 1872419 2048 4 10905 10875 468223 222971 2048 8 20297 29152 788950 959682 2048 16 26255 45090 663889 338242 2048 32 37687 54012 1224194 641192 2048 64 58578 53192 320342 1381061 2048 128 41263 86366 1130283 1140942 2048 256 60265 107953 1770096 932593 2048 512 51845 113506 1754908 1647536 4096 4