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: Sun Sep 13 07:08:56 2026 Auto Mode Machine = Linux oleg144-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-oleg144-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 2327 9177 561808 471099 64 8 2934 17659 365812 365812 64 16 1314 10557 1045286 866463 64 32 3646 8480 1304314 1168097 64 64 4784 53021 1526887 1452528 128 4 6396 7990 464097 545154 128 8 4366 15932 757430 615814 128 16 4573 30888 902598 800337 128 32 8995 26583 1111981 24371 128 64 9934 30761 27101 1123617 128 128 5192 46442 976473 1278855 256 4 4201 5051 241735 213518 256 8 3001 18388 773140 501091 256 16 4027 10985 305926 977189 256 32 9832 31272 1280084 733527 256 64 12318 38300 1376935 398153 256 128 6529 39659 1549845 1588832 256 256 11039 87461 1629830 1190657 512 4 4590 4427 472306 564561 512 8 8570 8533 870905 752761 512 16 7429 12229 1112797 284103 512 32 15789 46364 1140576 1764853 512 64 15505 38163 496091 1163439 512 128 15555 54836 1372364 1365383 512 256 13457 35302 66467 1471074 512 512 9624 49771 793657 1600443 1024 4 14156 5604 263789 127823 1024 8 10886 6965 342233 371575 1024 16 13666 23011 495393 296310 1024 32 21558 37872 1294910 771670 1024 64 27549 50450 440021 314308 1024 128 18023 51023 848337 718125 1024 256 21586 46901 1542286 208891 1024 512 29001 21379 623651 2085132 2048 4 6387 5055 65506 84880 2048 8 9125 12491 344606 297633 2048 16 9953 17797 418984 336559 2048 32 9725 31763 705955 1011436 2048 64 30246 33593 591072 662557 2048 128 19482 41020 324053 331557 2048 256 14992 25988 952024 664711 2048 512 27604 67584 971513 713816 4096 4 4520 4297 270596 265992 4096 8 7801 7868 640494 495943 4096 16 26651 16787 613812 575678 4096 32 18847 18152 1245748 610605 4096 64 21139 26122 482623 936038 4096 128 30277 36185 453895 346299 4096 256 52641 75421 1550836 918620 4096 512 18866 50384 1637768 494387 8192 4 1688 4435 253952 128469 8192 8 9874 8961 253105 262968 8192 16 15815 26673 781972 698726 8192 32 19398 25065 469505 351737 8192 64 32114 30109 243360 438240 8192 128 23062 35268 995161 946085 8192 256 36528 42525 621695 547960 8192 512 36458 54061 819693 762756 16384 4 6523 6548 335718 362917 16384 8 11593 13140 307131 298787 16384 16 11351 16542 786896 472189 16384 32 20117 23925 622369 363128 16384 64 31203 41317 562404 650833 16384 128 26594 35181 796998 927854 16384 256 36140 51147 1086099 717308 16384 512 33862 43327 1274806 867475 32768 4 6271 7242 272019 210020 32768 8 9379 11568 353637 332943 32768 16 18447 20113 800567 889924 32768 32 28639 23309 847306 573097 32768 64 24357 34253 442481 539649 32768 128 24767 40778 930302 578968 32768 256