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 Aug 7 07:14:48 2026 Auto Mode Machine = Linux oleg119-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-oleg119-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 1792 2197 551422 174784 64 8 1722 4859 38207 720041 64 16 2991 9072 169809 592827 64 32 3066 40507 998622 877797 64 64 2301 35574 1452528 1484662 128 4 4782 8024 533771 416888 128 8 2698 4473 776042 640042 128 16 2396 8678 962469 451985 128 32 8469 18721 1185654 889145 128 64 5111 24446 1303699 1229084 128 128 4918 80553 907174 1579934 256 4 6000 14751 580461 299693 256 8 9989 17319 646518 644578 256 16 7120 11566 147212 907792 256 32 5120 33834 1168627 894929 256 64 12651 48844 1019886 120580 256 128 11771 42278 1489641 1319408 256 256 25063 99302 1600674 947860 512 4 5167 10119 133055 238587 512 8 5690 13834 397549 86034 512 16 11948 19824 658170 515626 512 32 12725 35027 975328 948197 512 64 20020 43463 479798 221737 512 128 21377 55706 636705 1073309 512 256 18004 55124 1575781 1289930 512 512 24807 76122 934580 744153 1024 4 8480 6856 284062 233145 1024 8 9451 9602 199526 814087 1024 16 12678 19583 922497 522768 1024 32 21834 40874 860575 700440 1024 64 14266 26938 1169078 578150 1024 128 9486 45131 1064479 975285 1024 256 14748 22226 1440391 307776 1024 512 22920 51488 1408275 765890 2048 4 3926 3991 244659 158808 2048 8 7576 11349 431702 321554 2048 16 16981 24378 665380 323796 2048 32 29914 38054 771310 1108263 2048 64 21531 27128 1402711 594796 2048 128 27091 29377 513420 1145354 2048 256 31209 48090 836263 518221 2048 512 40956 71398 821782 286830 4096 4 8049 5173 142058 369635 4096 8 7649 6359 278244 163689 4096 16 22734 18667 395596 492135 4096 32 12739 16009 140679 376852 4096 64 20132 48337 410541 354510 4096 128 33379 43416 507052 375747 4096 256 36597 65510 1473932 571199 4096 512 49431 70676 1013095 862884 8192 4 4714 5962 371807 415691 8192 8 8467 10730 746970 456251 8192 16 16552 13543 611167 413445 8192 32 14077 26874 437632 340975 8192 64 22507 19725 469486 611929 8192 128 24716 29446 710869 761201 8192 256 19681 33036 730129 752038 8192 512 21804 26048 907384 666547 16384 4 4620 6089 322596 207297 16384 8 8948 7504 518399 395292 16384 16 25502 13680 832480 647894 16384 32 23352 28498 339178 241423 16384 64 17926 45408 865279 729476 16384 128 21099 45177 704022 447492 16384 256 40214 42537 768727 806379 16384 512 33983 58076 1226809 752110 32768 4 4220 4240 478496 166281 32768 8 7963 9334 443733 287249 32768 16