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: Thu Jul 30 01:32:21 2026 Auto Mode Machine = Linux oleg256-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-oleg256-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 2866 8416 397796 511494 64 8 2081 24510 659861 727850 64 16 3583 39309 955947 780776 64 32 6130 34935 203236 1734015 64 64 1820 24501 1087638 1648808 128 4 1503 3271 586868 179267 128 8 5012 14642 881842 718889 128 16 7332 22091 414314 656477 128 32 3867 60692 1032829 1093856 128 64 6570 71508 870405 1082825 128 128 3648 80553 1332828 1294270 256 4 2515 4706 480463 549283 256 8 4178 6753 524593 729045 256 16 3164 12984 768712 678807 256 32 5559 19785 1278559 659625 256 64 4748 52829 1219045 709299 256 128 6066 94537 321209 1471270 256 256 10946 25628 1610276 886067 512 4 2696 5219 113672 425935 512 8 4664 4087 227035 714207 512 16 7715 14280 332232 190399 512 32 17961 25270 693675 669247 512 64 14787 30994 1344020 1073309 512 128 20939 59528 1375881 369122 512 256 29056 51185 618371 1413929 512 512 11999 42363 911184 1889050 1024 4 3902 3667 597036 68793 1024 8 15128 14098 213820 205995 1024 16 18480 32754 805688 242245 1024 32 7095 14561 1053512 448569 1024 64 9565 19157 1197435 301786 1024 128 36270 59903 1383774 379554 1024 256 36009 32547 1584972 1278338 1024 512 16908 55051 1469467 744774 2048 4 6796 6195 354080 178957 2048 8 4841 5344 249028 257092 2048 16 12725 5955 1193576 342763 2048 32 15545 19228 595373 242915 2048 64 37063 36650 811457 643835 2048 128 20137 23311 1462911 1262704 2048 256 12977 39900 352497 432441 2048 512 22250 23688 1523901 126583 4096 4 3967 3142 259782 102308 4096 8 4996 6107 238222 272053 4096 16 738 12639 248767 351435 4096 32 22705 30611 554031 515791 4096 64 33455 27943 360620 222621 4096 128 40429 38500 997564 358947 4096 256 26626 37160 685527 201890 4096 512 21185 53212 662042 652735 8192 4 5510 4628 321492 234117 8192 8 5515 4900 234956 211547 8192 16 6698 8598 285912 176483 8192 32 11876 15307 738414 589352 8192 64 14497 17659 209771 392410 8192 128 28408 33013 310420 292957 8192 256 26251 23480 402179 448041 8192 512 20982 22009 368343 390669 16384 4 3010 3245 190030 137695 16384 8 7969 9320 322666 341234 16384 16 10761 6085 230274 181494 16384 32 8924 20958 238195 247578 16384 64 10793 15014 573729 477404 16384 128 12494 19360 390503 212175 16384 256 17075 21427 350070 289321 16384 512 16077 23377 253917 249569