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 Aug 31 14:05:06 2026 Auto Mode Machine = Linux oleg627-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-oleg627-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 2296 3497 460591 561808 64 8 1904 6041 603489 769584 64 16 2706 26668 1143223 955947 64 32 6518 31462 1336792 1279447 64 64 2801 21769 1304314 2006158 128 4 1653 4630 678033 401307 128 8 2274 18343 739689 761728 128 16 2529 5884 841746 990891 128 32 9958 50615 876086 940549 128 64 7803 82306 1319723 1007629 128 128 9853 46766 1467639 2066432 256 4 3367 4647 719277 418971 256 8 8846 8756 465466 492360 256 16 14347 21357 873809 168408 256 32 11502 43331 592309 901693 256 64 17750 53577 1168627 1304976 256 128 17916 67672 476624 1673001 256 256 15552 48976 622890 579209 512 4 7595 4961 499553 458002 512 8 9147 15279 484890 424504 512 16 15126 14664 1130370 1051242 512 32 15116 44245 1196499 321008 512 64 19083 25371 460852 409605 512 128 25728 79764 658978 1630828 512 256 18576 62590 1740536 1594501 512 512 22297 76079 1778004 1130370 1024 4 5776 10088 628212 368609 1024 8 12004 11017 725280 538364 1024 16 24167 31775 350214 610965 1024 32 18395 18545 455708 588851 1024 64 15337 63816 807657 985580 1024 128 18726 23040 582146 1515083 1024 256 21629 63039 915028 258580 1024 512 36830 88919 1087111 149834 2048 4 6991 8168 149687 211502 2048 8 13678 16766 236274 228117 2048 16 13235 15823 669320 371074 2048 32 20895 43597 439185 1151341 2048 64 32776 52207 1467159 547171 2048 128 23957 67143 1046556 442351 2048 256 26596 26497 1433135 1566989 2048 512 34907 76693 418882 481530 4096 4 6798 7129 373517 218013 4096 8 12868 15346 425467 327967 4096 16 22196 21709 382337 532514 4096 32 16313 29143 342530 443193 4096 64 34824 36656 544894 522044 4096 128 29265 73869 499272 811105 4096 256 38866 57445 1723189 551931 4096 512 37281 52626 778115 616035 8192 4 6560 6053 272294 283262 8192 8 8484 8936 230293 363119 8192 16 12851 15369 475423 375726 8192 32 2438 23315 571587 183763 8192 64 22416 36529 584351 1089374 8192 128 21120 33331 629382 818053 8192 256 33363 45493 944317 1356762 8192 512 36444 50761 781972 649021 16384 4 5083 6427 233266 188568 16384 8 11044 8520 320864 336054 16384 16 13046 15018 390969 403945 16384 32 15347 21645 515220 487172 16384 64 26711 24450 686351 645982 16384 128 25899 41039 895451 375539 16384 256 23785 42562 612556 831383 16384 512 31955 47797 1130313 900426 32768 4 5531 5889 338943 245352 32768 8 10689 10156 642472 275000 32768 16 14827 18041 673975 510493 32768 32 21301 26346 803690 683205 32768 64 26397 35631 542165 804716 32768 128 29677 35703 939581 691426 32768 256