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: Sat Jul 18 15:59:18 2026 Auto Mode Machine = Linux oleg410-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-oleg410-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 4762 11849 603489 127716 64 8 2806 14770 743988 361380 64 16 6182 43956 789967 769584 64 32 4360 44510 653436 769584 64 64 3162 20861 555990 1526887 128 4 3346 4608 535368 486822 128 8 3879 20489 646205 677178 128 16 7930 34530 710329 831319 128 32 6502 12968 1217930 895074 128 64 6708 62017 1231904 1032829 128 128 6879 52785 1421023 1778862 256 4 4474 9879 579209 190894 256 8 9306 16501 864661 658008 256 16 6166 28122 386126 486559 256 32 10411 36430 731528 1190657 256 64 8167 18541 1243036 944525 256 128 12369 38449 1066483 595264 256 256 14831 59382 610842 269188 512 4 5686 7588 515008 117755 512 8 9794 8355 631463 619799 512 16 8697 23182 984720 677267 512 32 11482 30895 470546 1066380 512 64 30592 79702 1147892 724081 512 128 18554 30721 657364 841884 512 256 21971 90250 1306409 1344020 512 512 38223 83850 679840 1834193 1024 4 6544 8991 342588 185305 1024 8 7389 8778 761815 143602 1024 16 16020 14665 1219189 252529 1024 32 34364 50080 507691 369529 1024 64 14740 43702 935966 1116792 1024 128 33978 55724 369402 546099 1024 256 25529 35325 487355 1033237 1024 512 34583 120230 1217461 1497127 2048 4 7139 6287 401646 207392 2048 8 9763 10170 554410 342476 2048 16 19864 23060 673466 619862 2048 32 31201 27630 308903 542643 2048 64 26503 45374 602176 1106978 2048 128 27416 76805 712869 716855 2048 256 27459 45964 725758 667293 2048 512 27385 60820 1049113 895082 4096 4 6733 8751 327861 290225 4096 8 12233 11043 344025 362736 4096 16 20467 18049 524467 393656 4096 32 27826 33559 1119734 856560 4096 64 24354 55162 896708 522314 4096 128 30017 39088 1414935 549636 4096 256 46952 76675 525060 1047884 4096 512 37343 94639 959029 576490 8192 4 7834 7229 191728 365498 8192 8 9599 14027 301198 241815 8192 16 14924 16437 411864 419093 8192 32 18721 29751 508853 396247 8192 64 25744 34959 726501 624293 8192 128 25635 44937 512030 354403 8192 256 37916 57813 818053 428587 8192 512 49832 68591 971772 1070836 16384 4 6866 7804 382276 273723 16384 8 11407 14996 379012 510167 16384 16 15848 20146 777344 595955 16384 32 30067 27000 961840 489236 16384 64 25755 34711 655571 1102938 16384 128 26149 39040 811933 772677 16384 256 38850 56128 718095 396755 16384 512 39363 54983 1064167 671011 32768 4 7021 7197 281635 201762 32768 8 12089 13005 296610 386569 32768 16 16555 22771 501353 433662 32768 32 24073 35471 930648 388518 32768 64 39134 53335 714897 724970 32768 128 43701 64120