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 Jul 13 15:04:24 2026 Auto Mode Machine = Linux oleg302-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-oleg302-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 2207 8861 524487 524487 64 8 3788 6910 681644 367817 64 16 3191 26609 929467 789967 64 32 3367 17453 1143223 942521 64 64 2561 52074 1421755 1163036 128 4 2793 10040 539674 44293 128 8 5946 9431 919605 680612 128 16 6039 28368 1015251 684081 128 32 6529 36363 1032829 703810 128 64 9042 38519 1217930 1175271 128 128 4715 28628 205398 1802755 256 4 8577 9489 149696 59150 256 8 9477 17378 762164 660030 256 16 6081 5995 1080434 612235 256 32 8441 35481 876662 807442 256 64 19903 28209 1168627 1185399 256 128 17100 27565 1369908 53792 256 256 7657 123919 1523457 468922 512 4 3556 8342 134210 234753 512 8 8467 17957 374530 120585 512 16 12647 22711 632765 520879 512 32 25477 32225 345487 814117 512 64 14756 19375 514144 592604 512 128 19812 21524 228047 504482 512 256 6647 81258 1674052 798972 512 512 18807 29008 1657257 757541 1024 4 4536 8326 288043 233678 1024 8 6691 11897 192990 219693 1024 16 13860 30340 985580 289168 1024 32 12292 37615 232994 623199 1024 64 17601 21007 368736 1058967 1024 128 13725 25295 159801 179774 1024 256 33009 47627 459560 1365299 1024 512 38308 68144 1594978 519292 2048 4 4988 4951 262964 165535 2048 8 5614 7096 605743 527838 2048 16 11165 11520 1152422 438467 2048 32 15066 24291 440626 306042 2048 64 25319 26399 807870 525127 2048 128 28304 41919 1436250 747158 2048 256 31004 59370 770549 553517 2048 512 23887 42240 435268 298108 4096 4 4801 5527 267067 265906 4096 8 1276 8232 498605 449807 4096 16 13943 17930 708015 556761 4096 32 18303 24900 452842 308503 4096 64 12641 24478 518609 309810 4096 128 22038 31073 619768 693777 4096 256 26358 35103 903974 830996 4096 512 29971 47837 1563397 516908 8192 4 5420 6366 234197 227127 8192 8 8973 7671 204621 270880 8192 16 15983 15825 569871 510342 8192 32 20677 26225 487152 394378 8192 64 18937 37553 604437 749283 8192 128 31070 46153 834383 353499 8192 256 27506 43580 1005146 998544 8192 512 32398 72844 781368 680339 16384 4 5310 7035 210941 264637 16384 8 9317 12647 304191 346150 16384 16 13862 21424 697930 330630 16384 32 19086 30667 560692 372058 16384 64 25899 40462 424116 778639 16384 128 28987 39032 706875 573647 16384 256 31723 46906 760846 759534 16384 512 45024 96405 876146 828097 32768 4 5577 5785 287473 297431 32768 8