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: Tue Apr 14 15:31:19 2026 Auto Mode Machine = Linux oleg329-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-oleg329-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 4074 9128 55213 447537 64 8 9891 18469 615952 598110 64 16 13122 33108 560635 666414 64 32 5936 31451 1421755 283217 64 64 8863 99060 1232453 1679761 128 4 10396 4884 88639 558771 128 8 5150 20638 726674 584313 128 16 8961 54817 871818 735635 128 32 24492 18534 1319723 1057236 128 64 9800 41842 1424795 493989 128 128 9817 70328 1209698 2132084 256 4 4410 7880 585845 500857 256 8 8997 37758 624339 865358 256 16 26750 21258 847597 102107 256 32 20499 83821 1036624 889002 256 64 17803 105737 1248819 464661 256 128 36326 146709 1169901 1453348 256 256 42702 122478 266119 2000242 512 4 6631 8652 417976 138602 512 8 18152 24692 584539 304400 512 16 35932 44712 756207 565156 512 32 26028 68219 1248678 917804 512 64 19371 19954 337029 572081 512 128 29366 43618 621413 516122 512 256 18066 60433 1237168 269351 512 512 21242 79814 499089 1556366 1024 4 5151 3421 485317 387289 1024 8 6876 6015 556212 709114 1024 16 22424 15089 1047091 789544 1024 32 59078 69559 811472 898189 1024 64 47219 81167 483678 413741 1024 128 26650 49124 846998 276082 1024 256 25827 84733 211660 1294520 1024 512 40756 48666 689090 206699 2048 4 9703 7704 415941 154276 2048 8 11935 17265 384323 396584 2048 16 14909 15632 456940 395743 2048 32 12365 23180 630324 256608 2048 64 17866 45100 1231566 1013345 2048 128 31324 70850 1362658 600744 2048 256 40458 22313 935233 613706 2048 512 35208 66888 315368 349073 4096 4 9120 9689 457912 189489 4096 8 28713 32495 476387 337344 4096 16 18194 24279 360779 419196 4096 32 18265 19156 974312 838336 4096 64 26598 50757 475780 508568 4096 128 36696 82535 1357683 984361 4096 256 16378 51415 1641053 1204353 4096 512 88646 81882 471290 1425146 8192 4 12274 19279 297101 191760 8192 8 22400 20780 366629 396590 8192 16 15301 14128 319575 469833 8192 32 20627 34788 577476 455084 8192 64 20426 21567 404923 183302 8192 128 32894 36502 1114569 944758 8192 256 47526 74328 1157875 733981 8192 512 61995 51579 1108528 978608 16384 4 10097 6441 618221 296666 16384 8 15935 13731 418215 216073 16384 16 18201 27650 579946 235027 16384 32 27141 40966 512354 307854 16384 64 21254 27196 739644 603953 16384 128 41315 36973 826175 534030 16384 256 70515 43279 428127 849785 16384 512 34923 65106 1077820 937307 32768 4 8293 10725 190989 133461 32768 8 14912 25925 606051 304597 32768 16 25473 27441 787449 828350 32768 32 31703 32308 700141 494052 32768 64 25957 38387 655283 408338 32768 128 43340 42766 537919 485014 32768 256 36952 54971 606286 436016 32768 512 37969 65163 442190 527554 65536 4