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 29 20:28:31 2026 Auto Mode Machine = Linux oleg430-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-oleg430-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 4002 11598 621657 241440 64 8 4438 18315 720041 576282 64 16 4549 42274 752329 495445 64 32 2105 40846 1168097 901377 64 64 2507 60149 1452528 1392258 128 4 2013 8387 499970 432330 128 8 6894 24242 412721 615109 128 16 7940 29358 780556 786271 128 32 11960 48967 267258 695603 128 64 6919 47532 1196221 1346196 128 128 5768 67796 1306873 48949 256 4 2525 4715 131347 543720 256 8 4179 5020 513063 257257 256 16 5196 39245 621448 497147 256 32 7634 55652 1148625 861885 256 64 9111 18852 1267990 559005 256 128 8094 75542 1391207 1004618 256 256 8898 18887 853662 1561112 512 4 8553 4362 105939 572691 512 8 18935 23045 633699 158371 512 16 20552 23506 314474 259771 512 32 31706 50899 130144 419692 512 64 17870 60185 671969 1222379 512 128 27554 89308 937845 896725 512 256 28066 107611 882718 1689859 512 512 11702 121266 1463057 1916017 1024 4 8329 3890 198990 356938 1024 8 12842 15871 384378 793922 1024 16 19645 15146 680357 297069 1024 32 28128 15881 939446 479145 1024 64 11203 28591 206699 344070 1024 128 26028 40899 663232 1096548 1024 256 44033 87588 819993 775152 1024 512 18846 78431 979064 563584 2048 4 12035 9514 252438 210724 2048 8 15059 8167 140397 331289 2048 16 29181 34483 394308 439477 2048 32 16864 16267 1102856 986010 2048 64 25605 30557 520198 626279 2048 128 28277 44565 514434 1153196 2048 256 16977 35310 229035 119437 2048 512 19532 73873 535839 463024 4096 4 7775 1036 197551 149800 4096 8 9228 22133 382056 321836 4096 16 14795 26095 490771 480571 4096 32 19763 20730 395213 490645 4096 64 23194 31438 326013 437516 4096 128 27403 43009 1028130 933647 4096 256 28763 59046 402086 543446 4096 512 26244 50242 256608 543463 8192 4 5277 5575 368560 353194 8192 8 10264 10396 425208 186869 8192 16 20666 26220 599794 560254 8192 32 19797 16522 433945 463845 8192 64 24270 36154 742836 667856 8192 128 26825 40629 459706 355140 8192 256 21785 38558 910220 507403 8192 512 22641 39115 612071 531746 16384 4 4976 6178 334401 302992 16384 8 9135 9994 602021 311121 16384 16 18737 36025 435361 320349 16384 32 15086 40644 591100 394036 16384 64 25467 39842 861904 677808 16384 128 30834 54168 844667 838351 16384 256 32419 51970 528412 1065140 16384 512 38022 57431 894426 814030 32768 4 6830 5099 253722 119250 32768 8