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: Mon Jun 1 12:49:05 2026 Auto Mode Machine = Linux oleg150-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-oleg150-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 2081 8726 289635 503814 64 8 2399 13084 901377 789967 64 16 5889 39535 842003 1124074 64 32 8311 22702 1002351 277078 64 64 5219 55844 852702 1599680 128 4 4657 10691 659704 447838 128 8 4592 7239 847059 633995 128 16 8965 30031 367768 985435 128 32 10440 50453 2211113 1802755 128 64 7080 39901 948860 1220700 128 128 7545 129279 1377278 1778862 256 4 2762 2784 549564 579209 256 8 8354 8206 836374 500157 256 16 12827 31139 1137672 876662 256 32 8793 30910 639967 522297 256 64 9910 41931 1266495 1391207 256 128 16915 58826 1591186 1543163 256 256 14543 110822 1718521 1911233 512 4 5815 7383 581059 377028 512 8 6017 10476 904658 508423 512 16 12084 21706 1026126 885996 512 32 14648 39167 1221684 1036527 512 64 27076 24364 1555239 448719 512 128 23450 64202 1510391 1276891 512 256 11811 54649 1414860 1251589 512 512 35896 79528 416598 1575781 1024 4 4647 3791 166971 332587 1024 8 11901 8574 870694 765344 1024 16 21033 55803 862823 165721 1024 32 18871 17300 229544 1022902 1024 64 36644 48058 1135391 973296 1024 128 24291 51241 1427940 907105 1024 256 13711 34365 1438461 1163693 1024 512 14843 33920 1585557 1288307 2048 4 5664 6331 648747 168460 2048 8 8499 8890 392793 154941 2048 16 11106 19715 888141 586631 2048 32 12642 49388 1334917 1050267 2048 64 46838 31020 816238 368148 2048 128 20850 69343 1322178 557288 2048 256 41940 131264 971513 1033213 2048 512 41234 80436 821546 681751 4096 4 4178 7414 137741 182751 4096 8 9291 8449 371787 291343 4096 16 13741 25190 464034 629857 4096 32 19206 17083 1096927 549144 4096 64 34857 58953 935834 570479 4096 128 14691 22468 372255 350417 4096 256 23466 35975 1683507 586467 4096 512 38314 34615 466086 1421726 8192 4 5413 5610 216554 168182 8192 8 2299 10728 634789 548625 8192 16 13519 12958 639503 539511 8192 32 12681 46723 507590 429149 8192 64 29232 28820 674132 439811 8192 128 26163 35027 861949 661708 8192 256 27355 33356 746953 537359 8192 512 30790 43012 512160 467207 16384 4 4781 6329 245887 267839 16384 8 8652 9640 257955 280759 16384 16 11065 11082 589058 356405 16384 32 23302 22563 387530 474815 16384 64 26310 34146 891455 873862 16384 128 29760 46353 760450 485942 16384 256 25867 30535 769493 656592 16384 512 28729 34792 618287 552377 32768 4 5261 5134 242171 330946 32768 8 8339 10211 910223 365694 32768 16 12408 10718 317113 210195 32768 32