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 May 27 04:26:24 2026 Auto Mode Machine = Linux oleg228-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-oleg228-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 4136 11753 587635 467815 64 8 3819 23046 735831 627470 64 16 4622 22842 901377 1033216 64 32 4996 27921 1163036 763021 64 64 5566 58193 1421755 1562436 128 4 4567 12099 336005 271173 128 8 5201 21056 790905 774922 128 16 8660 36929 921183 707520 128 32 6983 39432 656477 847059 128 64 7013 67481 1196221 1085013 128 128 4763 95311 2286447 1778862 256 4 7770 9223 289589 511840 256 8 6059 19194 1405778 746272 256 16 7955 15331 1003679 898674 256 32 12038 41747 1173737 1128110 256 64 11909 31192 1272498 458706 256 128 15411 41065 1686137 707430 256 256 12592 62671 1610276 1778290 512 4 7956 10459 462540 540002 512 8 5874 10265 467168 479798 512 16 9311 31488 1171052 878386 512 32 9443 25996 1190529 784094 512 64 12572 30394 582478 867738 512 128 17402 59707 982917 703215 512 256 16469 71487 681782 231664 512 512 11399 53848 1122687 1983258 1024 4 7622 5723 444070 252158 1024 8 16770 20893 1268896 498788 1024 16 19608 34564 1006836 322401 1024 32 18050 39411 671528 984450 1024 64 18907 21582 1236742 1071116 1024 128 27902 31897 434633 1214706 1024 256 21391 43912 864212 851870 1024 512 33279 57457 730460 1062110 2048 4 3858 9133 557433 219743 2048 8 10473 11484 297026 235516 2048 16 15838 30244 664505 265147 2048 32 26125 28871 210481 159938 2048 64 19410 53992 609137 733254 2048 128 56194 55510 609353 353716 2048 256 30300 36156 754574 922874 2048 512 42373 61530 900619 752987 4096 4 8038 9624 301000 466618 4096 8 14948 18358 400390 467265 4096 16 24711 26672 581485 1174627 4096 32 21514 37691 652834 770059 4096 64 29062 33741 864665 755996 4096 128 55340 64922 1430129 730256 4096 256 30124 63356 532085 1325524 4096 512 63003 55609 352163 712213 8192 4 6360 6990 252636 187920 8192 8 11419 11973 472248 491690 8192 16 16203 21730 630872 591870 8192 32 20182 24635 447061 380014 8192 64 25769 49208 860331 1057717 8192 128 36437 67417 685237 1146057 8192 256 3761 50101 873342 591778 8192 512 37129 66781 741617 1129481 16384 4 7487 8648 422660 391944 16384 8 14921 13669 429440 449938 16384 16 22704 23385 916286 1005467 16384 32 42564 34567 1210493 1463897 16384 64 36713 37511 560884 290898 16384 128 35376 55619 866283 1153227 16384 256 46114 92857 1459731 1081450 16384 512 54397 61724 778489 947765 32768 4 8557 7651 432003 418311 32768 8 16656 12763 637697 789648 32768 16 17838 20597 695253 608775 32768 32 25106 34637 711913 781232 32768 64 34190 63550 1350196 1001130 32768 128 41483 74161 1031840 772503 32768 256 44471 45926 916511 1052826 32768 512 42661 57441 883875 1042469 65536 4