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: Thu Jun 11 22:21:55 2026 Auto Mode Machine = Linux oleg226-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-oleg226-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 1193 4852 418250 388021 64 8 3582 15841 710511 560635 64 16 4503 22931 216339 743988 64 32 6254 59312 1204796 608965 64 64 3694 66529 998622 942521 128 4 2552 7019 446348 484625 128 8 6987 5354 962469 659704 128 16 5395 21658 659704 743788 128 32 7799 27729 1123617 934004 128 64 7118 32720 1185654 1133103 128 128 4727 112485 1377278 1539168 256 4 5979 7639 335564 341324 256 8 9132 15964 431775 611189 256 16 9341 16802 842278 958864 256 32 12210 66630 1142514 690151 256 64 12506 20743 86986 48594 256 128 7267 36782 1376935 499227 256 256 15246 109489 727070 766517 512 4 7397 5195 593915 314474 512 8 5441 13950 451170 688118 512 16 13248 27942 772252 552790 512 32 20067 46327 624485 737762 512 64 22634 45717 1187895 1171691 512 128 10159 63991 1326585 1306409 512 256 35804 52652 1599251 1009722 512 512 44168 83755 1282994 920953 1024 4 11429 11396 214761 541213 1024 8 11215 18287 215040 708646 1024 16 10688 35585 1068983 526227 1024 32 22711 13187 1062372 338511 1024 64 10157 27484 1274922 1001903 1024 128 21328 41967 522133 837910 1024 256 27945 49566 769320 1014925 1024 512 26241 69180 1319577 917570 2048 4 8616 8861 286113 291532 2048 8 10834 10338 815928 286275 2048 16 16922 11507 1056727 930068 2048 32 32757 18165 326070 494077 2048 64 27908 16222 705723 1157703 2048 128 21150 64604 583642 710334 2048 256 20445 63762 239816 1423162 2048 512 18315 66620 1418228 1330781 4096 4 6704 11778 236585 180512 4096 8 4754 8759 400829 357074 4096 16 9040 12856 183232 455158 4096 32 25699 20938 470207 482041 4096 64 16944 29658 1133400 328337 4096 128 23531 56814 514755 617985 4096 256 29780 59700 1036379 310684 4096 512 16504 40812 508117 434682 8192 4 3031 1589 274641 465586 8192 8 5887 7145 173835 177162 8192 16 7211 12442 478642 667207 8192 32 9445 12630 472598 576256 8192 64 33068 21248 725657 478056 8192 128 39880 65455 571188 939000 8192 256 28949 33169 380756 349295 8192 512 16177 24391 296200 160993 16384 4 6131 4793 232506 100574 16384 8 9974 10058 657094 569186 16384 16 13832 19409 776343 504619 16384 32 16277 27084 532173 476170 16384 64 23072 32254 702180 337605 16384 128 20898 25542 461313 362173 16384 256 27361 41545 889079 636322 16384 512 32422 38460 828186 660644 32768 4 4438 5033 272387 232288 32768 8 10469 14949 627449 496297 32768 16 22154 17449 347434 706863 32768 32