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: Wed Aug 26 18:04:10 2026 Auto Mode Machine = Linux oleg203-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-oleg203-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 3385 6368 598110 576282 64 8 2483 20056 852702 476959 64 16 4251 42128 1066042 592827 64 32 2212 34205 1304314 952555 64 64 2456 53829 1526887 1599680 128 4 2404 10488 561107 387686 128 8 3914 5274 680612 633995 128 16 4564 29753 1032829 859260 128 32 5401 41039 1048974 628061 128 64 6313 25858 2098744 1319723 128 128 9603 42881 589446 1911894 256 4 9103 11953 535583 318447 256 8 9938 22719 807442 664935 256 16 9202 27544 1093639 937924 256 32 15200 40018 1292410 1062263 256 64 16242 61346 1117543 288577 256 128 12839 49756 1437779 1487577 256 256 19897 119839 1662639 463858 512 4 6843 8410 513530 553502 512 8 7000 18342 862164 784094 512 16 17225 31301 871966 1010197 512 32 8123 28897 828247 1125040 512 64 26069 56084 1418599 920953 512 128 26090 113672 2057359 998455 512 256 23084 61399 2039772 1619757 512 512 26130 93499 595397 850554 1024 4 6837 9062 543267 473650 1024 8 8810 16813 184168 573671 1024 16 18446 32890 1055843 623289 1024 32 10253 42719 672369 616844 1024 64 32909 55597 1058706 772781 1024 128 23575 57149 1446211 979734 1024 256 44928 60966 705271 844334 1024 512 22219 86906 2211841 1213334 2048 4 10284 9075 187341 424806 2048 8 28105 15620 721673 475190 2048 16 18461 15720 450990 707934 2048 32 13365 23005 640762 234002 2048 64 16931 23005 299542 1258634 2048 128 21449 25883 1568134 454787 2048 256 15819 95803 1689998 1000015 2048 512 29314 35894 994112 1565847 4096 4 3353 4850 217376 128107 4096 8 12621 18507 555698 341930 4096 16 17656 38371 1137453 1041468 4096 32 40285 65098 695659 1144728 4096 64 37919 36928 426576 732998 4096 128 41439 54976 800933 674677 4096 256 50503 56546 582155 235363 4096 512 36471 72935 1304093 514956 8192 4 6924 8338 181500 221860 8192 8 5258 7811 451224 547663 8192 16 11045 12418 280460 195303 8192 32 23160 18487 615801 752318 8192 64 29898 51450 1490544 523546 8192 128 29654 29474 705599 1009369 8192 256 39456 39259 1169581 645401 8192 512 34304 60009 836944 749430 16384 4 6669 6762 231523 191410 16384 8 10394 15396 457834 426167 16384 16 17001 19484 850711 526986 16384 32 26021 26378 519387 636917 16384 64 30630 25540 565528 436544 16384 128 28160 38158 838954 685120 16384 256 36265 52624 928644 370108 16384 512 36558 68058 1146953 879060 32768 4 7936 8384 220585 289270 32768 8 11317 12455 981813 374012 32768 16 26760 25519 447417 730417 32768 32 20554 31780 307328 288590 32768 64 23565 49790 675698 346549 32768 128 21754 31009 452347 371540 32768 256 21440 24745 495434 722272 32768 512 31106 86351 1756704 882473 65536 4