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: Fri Aug 14 19:32:32 2026 Auto Mode Machine = Linux oleg639-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-oleg639-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 3427 6253 204474 503814 64 8 2911 6523 829001 789967 64 16 2161 10028 1083249 1045286 64 32 2156 27849 99097 1279447 64 64 4564 49048 1392258 557144 128 4 3354 10119 659704 601330 128 8 5809 16082 513847 710329 128 16 8649 26358 1009524 739689 128 32 7758 27856 1319723 249497 128 64 4890 57475 1377278 1009524 128 128 3357 17733 1196221 2132084 256 4 5220 3480 611189 569079 256 8 7485 11080 1023775 675391 256 16 9586 20848 1122215 1075025 256 32 13406 38507 1347557 757326 256 64 14524 75229 1463250 1422540 256 128 13351 37752 1729594 1549845 256 256 12121 101942 1718521 1952947 512 4 2747 4026 317402 95364 512 8 12981 18736 428485 446758 512 16 18320 27648 308999 930530 512 32 16347 18210 537299 726285 512 64 21943 36842 1438555 527273 512 128 13650 62961 1610042 1177473 512 256 16310 84613 1801873 1207940 512 512 25967 49411 1718254 843537 1024 4 4827 3858 318409 262371 1024 8 7118 7695 418131 778101 1024 16 20591 22378 1052480 1017811 1024 32 21887 17836 762491 198292 1024 64 16499 44193 437199 426350 1024 128 11402 30349 402346 599537 1024 256 25777 57057 838728 984450 1024 512 10396 28707 1789714 257217 2048 4 4989 5312 403628 421823 2048 8 8012 8689 534472 581312 2048 16 14240 21557 636819 1026055 2048 32 14708 15120 1355348 1137768 2048 64 22859 29533 590706 1226992 2048 128 28323 48863 1584915 431160 2048 256 37509 73412 1068824 1478778 2048 512 38837 48513 831165 383243 4096 4 8199 5908 328281 218757 4096 8 8815 9899 590966 250717 4096 16 12509 12436 463146 322168 4096 32 27383 43869 714969 528923 4096 64 22996 26572 1165937 402284 4096 128 22714 38373 501531 573679 4096 256 39145 49693 1813981 1181412 4096 512 56166 68994 851213 837968 8192 4 5000 6209 239524 272331 8192 8 10249 8990 322264 316744 8192 16 2675 16301 895488 554039 8192 32 18481 26731 748336 715338 8192 64 27953 31836 524858 450213 8192 128 38012 52151 472488 572463 8192 256 35715 50769 1014465 596256 8192 512 28299 36682 1394367 957661 16384 4 5192 5941 392158 338960 16384 8 9823 9466 383368 680398 16384 16 15411 15593 355332 555125 16384 32 21265 24000 547278 552674 16384 64 27049 29394 538170 886384 16384 128 26745 37496 646973 552465 16384 256 24994 41820 631028 605982 16384 512 40926 53174 1114475 966670 32768 4 5937 6468 454947 312008 32768 8 10174 9175 251747 336946 32768 16 16470 21924 477035 768533 32768 32 21058 25487 496799 668513 32768 64 25727 30098 811089 693181 32768 128 31565 32042 660006 658296 32768 256 28266 37401 519359 430371