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 6 05:21:23 2026 Auto Mode Machine = Linux oleg640-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-oleg640-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 2459 4503 484710 571375 64 8 1881 20732 186698 615952 64 16 5109 21933 1049372 789967 64 32 7782 60955 1163036 886494 64 64 2317 85006 156448 1163036 128 4 4493 9120 586868 474349 128 8 3231 17266 821147 566435 128 16 11189 32569 731625 870405 128 32 9692 68893 1162547 940549 128 64 19578 61562 1306873 1363288 128 128 3896 59199 1487977 511887 256 4 9033 13792 522551 323630 256 8 14098 10734 850956 162324 256 16 11351 14862 1057034 1089202 256 32 7755 26595 562520 977189 256 64 9712 48780 1286217 1027695 256 128 14357 49014 725106 1163562 256 256 23871 101991 1814348 802014 512 4 6814 9276 154264 502946 512 8 5959 12052 802555 710192 512 16 10872 38516 1030064 451170 512 32 20428 39230 615359 847532 512 64 16812 80112 773364 285235 512 128 22049 94114 816594 950295 512 256 23248 98180 395644 1112797 512 512 25312 83359 1729323 2105777 1024 4 8369 5590 202013 565737 1024 8 20085 10336 561668 538094 1024 16 30094 21746 307688 997019 1024 32 23715 23407 1383774 575902 1024 64 37618 35688 551711 1120580 1024 128 31053 39040 1278338 372768 1024 256 35466 98103 1044799 1450117 1024 512 25613 38533 294341 522450 2048 4 6071 11583 268060 399145 2048 8 10926 8872 436862 424806 2048 16 11915 26803 249759 169467 2048 32 23426 27583 190934 379668 2048 64 36441 48290 866287 583325 2048 128 29808 100857 1176412 1153196 2048 256 21353 57418 809774 220549 2048 512 46477 53308 724656 1576480 4096 4 8739 7593 317764 213176 4096 8 10782 13807 428716 390586 4096 16 19058 29784 789813 732498 4096 32 27658 33142 1003156 846265 4096 64 39093 57549 652016 1084464 4096 128 35917 51713 998260 809309 4096 256 32607 48628 515868 530573 4096 512 35832 60414 780200 450858 8192 4 6809 7827 405062 344300 8192 8 13874 15696 371168 384423 8192 16 20298 30304 466167 481371 8192 32 19069 35187 857069 350310 8192 64 22468 40102 607214 579179 8192 128 38225 60677 1130224 999125 8192 256 39796 83159 757543 356082 8192 512 28324 58384 786177 527363 16384 4 7665 9573 349339 283220 16384 8 12608 15152 401922 300381 16384 16 22103 30720 405966 728139 16384 32 41133 51469 569861 380943 16384 64 45830 58758 625559 635239 16384 128 47212 69073 1065834 812538 16384 256 56046 97605 1657136 803964 16384 512 71605 73817 898789 1060996 32768 4 11413 9464 453172 259875 32768 8 13392 16047 441136 399609 32768 16 26213 29815 526038 352954 32768 32 28487 39843 491870 421096 32768 64 35155 48869 806657 906022 32768 128 38669 62237 1010299 868164 32768 256 46194 58954 928692 692782 32768 512 50961 75655 751970 580007 65536 4