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 Apr 29 17:28:51 2026 Auto Mode Machine = Linux oleg431-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-oleg431-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 2989 5516 94927 571375 64 8 2964 23179 358006 727850 64 16 6789 22221 1421755 763021 64 32 5215 48861 1168097 1105556 64 64 5047 72553 645579 1518251 128 4 7408 3520 188256 64036 128 8 4163 14335 718889 718889 128 16 9786 47356 948860 1065630 128 32 8621 67865 1111981 990891 128 64 12290 50956 831319 1142750 128 128 5284 77439 1521718 1539168 256 4 7375 13010 641880 339061 256 8 6408 21906 399932 729540 256 16 6801 33315 605332 693718 256 32 10614 44214 1254656 876662 256 64 16802 50215 1256123 1231629 256 128 16602 64497 485678 723153 256 256 19242 80812 1673001 1148625 512 4 3618 10157 392606 509026 512 8 11377 9425 833713 714207 512 16 11628 13738 594573 594079 512 32 21985 21791 1125630 253366 512 64 29481 53355 1340664 376764 512 128 12806 38475 1480200 1279935 512 256 26733 111137 1655979 89133 512 512 22040 70126 117858 1333173 1024 4 8587 10014 493231 365566 1024 8 8638 10654 356404 712171 1024 16 17654 13977 332458 89120 1024 32 31626 59988 437600 735086 1024 64 14933 73263 289754 286755 1024 128 23931 40370 514317 376890 1024 256 25758 57158 247465 216853 1024 512 32839 70301 1456510 1427940 2048 4 6196 7238 146189 390543 2048 8 13815 13848 801912 241678 2048 16 17686 12971 367628 293624 2048 32 19461 20350 530707 310399 2048 64 24832 18479 407960 366827 2048 128 37795 45804 607328 192122 2048 256 35848 27049 1070022 1009297 2048 512 38411 72306 1673209 569858 4096 4 9482 6469 348237 159818 4096 8 8078 11962 571503 650880 4096 16 12012 15396 669498 518093 4096 32 21313 21388 201426 370177 4096 64 17583 24546 1420198 609976 4096 128 30647 29009 849109 556148 4096 256 32121 52719 1056780 767753 4096 512 45761 51392 845224 808205 8192 4 7530 7623 261575 304138 8192 8 10906 13537 356577 344172 8192 16 12538 16859 539689 527258 8192 32 23023 28400 372686 543565 8192 64 25422 44417 741169 355864 8192 128 35124 32700 468002 575638 8192 256 33366 44237 884857 680514 8192 512 40771 55649 678659 528344 16384 4 5823 6472 274829 224502 16384 8 10558 14026 417268 301508 16384 16 17267 19150 449317 376289 16384 32 25657 31087 735535 588463 16384 64 27853 38207 646365 490962 16384 128 35168 55036 424247 612648 16384 256 26569 44905 782692 683634 16384 512 31699 54071 527629 488870 32768 4 7425 8008 286526 479421 32768 8 14358 14379 471522 461286 32768 16 22179 21668 378234 344610 32768 32 22885 28469 456811 577511 32768 64 26853 47472 757782 532612 32768 128 37810 60242 686958 580078