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 Sep 8 03:13:56 2026 Auto Mode Machine = Linux oleg443-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-oleg443-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 2245 5728 474430 496362 64 8 2392 6470 789967 666414 64 16 4112 17348 1070292 863676 64 32 4251 39875 1255511 1013707 64 64 4214 59707 1690338 1518251 128 4 1884 2722 627328 455822 128 8 7004 21515 743788 684081 128 16 4660 19959 370050 921183 128 32 9356 62312 1243315 770474 128 64 4236 49327 1373754 1269781 128 128 8782 38741 1705404 1487977 256 4 7445 10801 639967 356156 256 8 11142 23479 980760 235324 256 16 14185 33639 664935 850956 256 32 14893 47024 744204 1169901 256 64 5834 47137 951219 319204 256 128 11960 63318 1286217 1405778 256 256 8223 75648 1122215 1942349 512 4 8023 7228 206037 263501 512 8 11301 14260 286989 342021 512 16 10824 16580 1108203 539459 512 32 18993 43360 423833 1143004 512 64 6378 27478 1480200 1312798 512 128 13046 73947 1421416 1372364 512 256 13100 55406 1700565 1580419 512 512 15144 65208 1574625 226651 1024 4 4538 6296 178334 246684 1024 8 6045 6948 719087 395382 1024 16 11178 25739 482753 682303 1024 32 23025 40618 616490 779938 1024 64 11204 32382 667977 625923 1024 128 15325 20084 1523683 893517 1024 256 23905 30252 503701 1400926 1024 512 22092 94118 1122924 282177 2048 4 5805 9655 414076 300864 2048 8 10398 12088 292107 838631 2048 16 26142 21654 1130878 543535 2048 32 24456 40380 587836 278832 2048 64 35162 68357 328363 694259 2048 128 34769 65500 423842 547136 2048 256 35437 77215 834557 1301938 2048 512 33815 33397 1157703 1064453 4096 4 5719 6930 352763 188184 4096 8 12313 13015 360408 335539 4096 16 9418 10162 416938 259437 4096 32 20734 16545 506993 271619 4096 64 24035 34003 476110 396435 4096 128 27492 54291 1600538 511933 4096 256 20121 36027 1660242 406828 4096 512 35723 75385 1761711 894933 8192 4 7008 11820 179692 276860 8192 8 9174 12103 555508 392432 8192 16 2762 23662 528653 509260 8192 32 14336 21765 402632 674794 8192 64 16041 24987 507021 1267755 8192 128 30717 62831 418726 450703 8192 256 22731 29056 435513 369476 8192 512 19119 34598 1095487 927443 16384 4 5334 10108 270149 402794 16384 8 10170 12124 169163 226643 16384 16 28334 25467 367964 702632 16384 32 27221 23784 469928 640103 16384 64 31605 25037 681809 625605 16384 128 34802 32822 1146455 518986 16384 256 49736 92606 791381 409405 16384 512 57823 38678 446564 1109796 32768 4 7087 7094 234833 301917 32768 8 11279 11313 279030 283024 32768 16 15771 16698 394804 367952 32768 32 19146 31071 867452 590117 32768 64 25029 36217 882473 568672 32768 128 30066 38294 740687 725084 32768 256 27543 44404 1123842 941151 32768 512 31433 43258 1231225 836385 65536 4