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 22:22:35 2026 Auto Mode Machine = Linux oleg151-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-oleg151-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 4 846 9178 155272 55167 64 8 3034 14100 852702 725882 64 16 2877 17558 969761 703068 64 32 5286 38414 831569 1304314 64 64 4937 72086 1143223 1679761 128 4 5542 12791 663782 92614 128 8 7599 23951 571257 809997 128 16 11471 61127 1133103 740710 128 32 9241 26862 1105114 983630 128 64 9112 53378 1349580 1440082 128 128 7162 35594 1755594 1637771 256 4 3383 8396 618584 577651 256 8 9824 23400 288655 340783 256 16 7781 21076 217321 518263 256 32 15612 31253 1224606 1463250 256 64 13784 10193 1479379 1354356 256 128 5186 47654 281688 1248819 256 256 14321 82210 1384034 2170027 512 4 7762 5302 450318 555938 512 8 4751 7425 849208 195656 512 16 17974 26819 497585 506863 512 32 16499 46668 1772135 792486 512 64 21394 27523 860437 1004057 512 128 21340 68548 1541840 1005938 512 256 7687 39683 1210664 1610042 512 512 17684 37586 1594501 2089386 1024 4 3646 5335 256128 254927 1024 8 6238 10847 593653 541486 1024 16 17893 33736 629317 984676 1024 32 20679 35886 736220 1189476 1024 64 22033 62991 1232130 827099 1024 128 16447 35213 1501838 487189 1024 256 27086 75594 1653942 1000969 1024 512 33591 90908 788384 1832475 2048 4 10542 9537 647866 281740 2048 8 12630 15479 935946 390845 2048 16 15762 21012 597070 578026 2048 32 24885 34507 272853 522571 2048 64 29495 51679 963774 400690 2048 128 34858 65813 1298788 664300 2048 256 45325 62262 1373553 262433 2048 512 38580 83769 724962 1545562 4096 4 8640 9860 618252 292862 4096 8 14604 7930 428855 288128 4096 16 23554 22890 597689 624658 4096 32 30676 36126 363727 152132 4096 64 35932 53410 664834 345075 4096 128 33282 58631 1275530 310797 4096 256 41628 81261 641786 371924 4096 512 70494 105279 1803508 1036942 8192 4 9467 7889 188638 246116 8192 8 7961 9472 452442 304241 8192 16 12065 19133 269988 331741 8192 32 15836 35805 328691 777232 8192 64 23255 46441 1242945 623489 8192 128 40700 64978 1016355 1090376 8192 256 34770 63603 862599 822499 8192 512 37779 42460 1294746 686497 16384 4 8577 9687 345517 237115 16384 8 9429 15684 511424 489909 16384 16 15112 19557 1006011 550188 16384 32 16591 18795 797119 652229 16384 64 18115 19712 778895 431078 16384 128 20267 36083 850322 622561 16384 256 24520 40296 660219 285515 16384 512 30898 56016 1071752 674627 32768 4 6001 3712 264213 597400 32768 8 10169 6641 295814 746339 32768 16 15555 21695 494828 335579 32768 32 19453 24140 896847 597540 32768 64 27699 39786 523724 551167 32768 128 35190 39786 613208 443230 32768 256