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 Sep 4 10:02:30 2026 Auto Mode Machine = Linux oleg624-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-oleg624-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 1559 5941 598110 647135 64 8 3073 17311 136413 581273 64 16 4693 38327 969761 454354 64 32 2760 12253 1163036 1066042 64 64 4225 41586 1363961 524487 128 4 2087 3055 656477 501839 128 8 5286 10874 659704 819893 128 16 9326 15957 1254941 969421 128 32 4181 60067 1185654 962469 128 64 9296 52008 1185654 1175271 128 128 9713 52999 1391557 1967960 256 4 3624 8425 562815 398153 256 8 7721 25419 455398 117814 256 16 6797 28854 644578 695516 256 32 8852 33468 714967 980760 256 64 11776 44183 1224606 1213534 256 128 8615 32778 1405778 773140 256 256 15016 78502 1570244 309542 512 4 8596 5500 293259 530006 512 8 7696 12189 232190 447131 512 16 16346 36221 892254 558832 512 32 17444 47680 743123 771143 512 64 18849 27296 333108 808904 512 128 19709 50142 922535 627587 512 256 21288 33085 520879 217868 512 512 26190 80821 120214 451075 1024 4 7499 5832 591935 150770 1024 8 10173 12803 771670 573671 1024 16 11691 12666 930894 577528 1024 32 18557 17551 246925 496596 1024 64 16839 57351 603750 203294 1024 128 28518 33345 1302766 858340 1024 256 33012 72341 1378445 137876 1024 512 15633 89990 239757 909410 2048 4 5552 5526 168572 193354 2048 8 7403 16037 584476 798409 2048 16 15199 19996 697302 724472 2048 32 28419 25798 657889 436862 2048 64 16635 50873 1296240 1185177 2048 128 29940 25199 639807 562028 2048 256 28664 34482 1447382 741226 2048 512 28655 64207 788587 403703 4096 4 6145 4849 249298 302687 4096 8 8780 12788 291907 318926 4096 16 15865 17374 337755 357729 4096 32 19520 19485 768165 403076 4096 64 24015 44668 857972 464034 4096 128 20938 19427 538523 433169 4096 256 31461 42663 592842 1234114 4096 512 34774 39274 885797 846640 8192 4 5689 6536 210434 324421 8192 8 12064 2487 502726 550647 8192 16 18473 15671 770729 476584 8192 32 19208 25807 755643 813098 8192 64 19941 27014 618172 456354 8192 128 24086 35770 587197 638694 8192 256 33363 37530 617283 516324 8192 512 31904 49494 842175 555238 16384 4 5714 7391 184977 207908 16384 8 9635 11730 577490 559601 16384 16 18628 21963 576453 494285 16384 32 22213 25670 969986 641501 16384 64 25358 30026 719321 459091 16384 128 22565 37409 387401 700534 16384 256 25963 39731 701456 538238 16384 512 27992 41394 1089439 866370 32768 4 5962 6322 257106 206284 32768 8 9701 11086 370871 313365 32768 16 12885 22566 560445 529807 32768 32 20435 26114 448894 331348 32768 64 23491 31199 533967 414506 32768 128 23732 32223 459134 375917 32768 256