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: Fri Sep 11 21:20:19 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 2177 3742 614542 546928 64 8 1957 26533 818885 603489 64 16 2640 11749 1033216 1101022 64 32 2260 62198 1066042 1101022 64 64 3371 82676 1119387 1357066 128 4 2231 7390 496272 370816 128 8 4454 31312 584313 776042 128 16 12769 50855 1162547 1000121 128 32 6264 73991 776042 948860 128 64 16625 28763 1471662 1332828 128 128 17780 110358 1579934 2066432 256 4 10151 10121 656399 93127 256 8 5776 9424 490336 792543 256 16 8586 22067 1190657 484801 256 32 4827 24691 1213534 1108314 256 64 9207 84714 1368162 521536 256 128 9591 27303 575484 489442 256 256 9938 82979 1652404 565185 512 4 5012 4950 390820 105981 512 8 12405 15494 660803 796306 512 16 24206 36020 1053821 587738 512 32 22867 19588 1422357 1047141 512 64 14388 80566 1487377 1030064 512 128 16977 58155 802555 1193838 512 256 19108 122079 707152 1672748 512 512 27571 76762 1236455 837942 1024 4 5892 5433 447541 251405 1024 8 13164 16904 431706 309172 1024 16 26505 34795 1074599 195529 1024 32 30549 65119 922497 992412 1024 64 38473 68500 1200447 1124099 1024 128 34508 70060 691420 1161176 1024 256 45189 71274 1622698 1089317 1024 512 46507 50441 1774922 658453 2048 4 5415 8470 180060 309215 2048 8 12879 17654 356979 437151 2048 16 13765 30662 854821 369876 2048 32 18368 39827 1285570 880494 2048 64 24286 49275 1501525 422529 2048 128 15248 31030 864195 1016824 2048 256 43662 82932 1018874 453395 2048 512 27875 74205 878962 1291951 4096 4 6228 6888 230136 387651 4096 8 9144 15363 411989 245666 4096 16 15570 27452 315077 580993 4096 32 1634 28135 609262 589789 4096 64 26550 37970 277059 647495 4096 128 38699 42387 874302 1274016 4096 256 29496 52459 445214 337483 4096 512 46219 59179 725476 702572 8192 4 5747 6380 271239 305624 8192 8 9504 15811 493165 403843 8192 16 15896 18706 665038 356392 8192 32 15681 28837 919205 654261 8192 64 29916 41391 913973 623624 8192 128 27520 42131 690262 731372 8192 256 29539 63193 785207 569522 8192 512 31260 52810 1120019 652175 16384 4 6870 9000 426011 299963 16384 8 11048 10706 385661 333876 16384 16 17179 21131 853511 591482 16384 32 23567 31535 513361 632049 16384 64 28814 38446 722839 610276 16384 128 31917 49363 995922 705257 16384 256 34224 45432 1258856 790344 16384 512 63168 85885 854753 607149 32768 4 11012 9360 352818 259824 32768 8 12618 17322 425144 407856 32768 16 17791 26013 328580 264076 32768 32 19446 31613 1054620 701294 32768 64 37013 46711 684406 563304 32768 128 38653 70960 767580 596314 32768 256