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: Sat Aug 15 09:36:27 2026 Auto Mode Machine = Linux oleg631-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-oleg631-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 1543 2716 587635 290890 64 8 1649 4190 126274 673098 64 16 4047 13928 913649 666414 64 32 1979 21087 1101022 763021 64 64 3989 42923 1599680 1484662 128 4 4238 7723 168413 587511 128 8 5654 12894 770474 684081 128 16 8286 14608 1022989 141289 128 32 5449 20826 1133103 1007629 128 64 2755 47389 1142750 1000121 128 128 8858 75735 1467639 1827299 256 4 3449 4771 604991 140822 256 8 2633 7067 836374 593947 256 16 5612 9433 189747 802614 256 32 6286 26602 1023775 111155 256 64 13186 44107 1422540 1347557 256 128 4263 27910 1231629 1254656 256 256 4584 30295 519266 1938842 512 4 5202 3390 144341 94482 512 8 5784 8466 270198 416921 512 16 11135 23483 590648 362089 512 32 12944 32076 943200 388487 512 64 7912 31752 688118 1062161 512 128 18411 46643 1273106 453840 512 256 8880 39084 349479 1560891 512 512 17807 60533 1422357 370204 1024 4 5719 3026 146202 211524 1024 8 6885 7388 127444 177040 1024 16 7271 10569 851195 400657 1024 32 8610 31382 807505 224458 1024 64 15204 38855 848337 336495 1024 128 20962 21956 1324460 970437 1024 256 25725 68102 738245 761950 1024 512 18182 43485 844168 223245 2048 4 6683 3920 74985 169157 2048 8 4909 5531 297540 127205 2048 16 11930 16930 543948 360879 2048 32 25600 23473 1408461 280160 2048 64 21684 35282 1441311 1284033 2048 128 19324 28413 761869 1206823 2048 256 30678 42071 706420 579820 2048 512 16941 27780 1359854 726494 4096 4 6603 6335 111350 389250 4096 8 13236 8988 486519 466200 4096 16 12854 18354 691292 668846 4096 32 20822 15373 278731 239337 4096 64 19290 33030 431559 441190 4096 128 22315 28621 331153 179941 4096 256 23634 25968 533954 566304 4096 512 1220 45611 1237492 928350 8192 4 3978 4642 382553 323103 8192 8 7731 11570 453218 511840 8192 16 11099 18111 451900 325494 8192 32 16544 13714 332049 283097 8192 64 15846 35469 350911 339242 8192 128 28444 32220 674410 502976 8192 256 31877 35308 334421 584261 8192 512 44639 48095 728179 590162 16384 4 4292 6265 446651 356181 16384 8 5826 5483 388892 396007 16384 16 9721 13081 194707 211232 16384 32 15072 29938 857751 430614 16384 64 12433 26596 345668 343991 16384 128 28813 55148 986926 864996 16384 256 26696 33287 394595 1077398 16384 512 39666 96011 619525 291774 32768 4 4714 7079 187083 472877 32768 8 9321 12488 455788 660301 32768 16