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 Dec 3 02:02:38 2025 Auto Mode Machine = Linux oleg432-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-oleg432-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 10832 19104 260160 192730 64 8 13637 41664 727850 402569 64 16 14571 64779 565358 561808 64 32 15278 70091 942521 587635 64 64 14063 98011 789967 1002351 128 4 11251 22788 211216 210553 128 8 16241 36972 589446 627328 128 16 25220 65274 670413 561107 128 32 20375 85559 927549 546819 128 64 30097 102971 1093856 1111981 128 128 18664 115834 2211113 1424795 256 4 16169 18859 302223 329894 256 8 19753 40615 379842 501794 256 16 26941 55945 651223 368881 256 32 26430 90103 934659 530031 256 64 37371 122842 1071806 992545 256 128 29592 135799 1729594 1292410 256 256 46460 188779 1445521 1740810 512 4 17119 19668 346379 350907 512 8 25744 34808 447877 392966 512 16 36078 54538 682649 610287 512 32 49397 99744 853257 1103647 512 64 39984 109987 1227971 1273106 512 128 52892 157685 1207940 1546280 512 256 46410 137194 1391933 1239310 512 512 61406 198147 1380303 1797349 1024 4 18327 19156 290322 249565 1024 8 27588 36968 452682 451683 1024 16 40310 56168 622115 582462 1024 32 53894 80749 854752 744774 1024 64 59586 104789 1020956 1023145 1024 128 64637 121847 1131503 1116792 1024 256 68348 122798 1418508 1349428 1024 512 68601 146747 1738286 1638796 2048 4 17536 19713 263917 256356 2048 8 29509 33004 508195 537246 2048 16 44982 57286 756835 686546 2048 32 58504 96942 1191423 952024 2048 64 71244 144020 1161617 1166349 2048 128 82444 143851 1498120 1183870 2048 256 88535 149499 1545562 1332432 2048 512 84061 159813 1952344 1699696 4096 4 19492 20632 294423 336841 4096 8 29113 37489 495885 513340 4096 16 49195 58243 853836 760648 4096 32 73410 81634 1285167 958120 4096 64 93712 119222 1174627 1098119 4096 128 87149 110116 1258800 1088794 4096 256 83487 135164 1521580 1442740 4096 512 103943 133507 1606825 1387061 8192 4 18584 20336 310501 288267 8192 8 30317 36395 514184 444396 8192 16 50312 63849 737478 810126 8192 32 70313 79959 1214347 852264 8192 64 83516 120488 1401305 1302797 8192 128 100019 139888 1601867 1246688 8192 256 100604 155475 1565449 1315769 8192 512 101958 157417 1850799 1478168 16384 4 19803 20890 301242 272101 16384 8 31908 36276 415909 546373 16384 16 49833 56496 758796 783620 16384 32 71538 95385 1079802 935801 16384 64 85458 112862 1378558 1203898 16384 128 96487 145311 1408537 1170693 16384 256 94103 146969 1657976 1287440 16384 512 106697 168611 1969671 1409982 32768 4 19891 20953 350827 320535 32768 8 33612 37304 656751 542516 32768 16 54680 65287 962128 965949 32768 32 75961 87931 1134904 1020494 32768 64 89895 119419 1313034 1165005 32768 128 102400 147279 1643735 1325942 32768 256 103793 139575 1678688 1297428 32768 512 101906 154456 1673293 1398431 65536 4