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: Mon Mar 2 02:27:12 2026 Auto Mode Machine = Linux oleg310-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-oleg310-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 3306 9730 79588 88539 64 8 4904 24989 240575 175815 64 16 5038 32064 453587 365812 64 32 6332 51161 608965 528618 64 64 5638 55361 331891 955947 128 4 4468 13672 20605 110722 128 8 2374 17281 218080 196310 128 16 7074 27801 304037 356533 128 32 7034 34783 606767 231429 128 64 9770 72395 573699 843068 128 128 14287 41067 1196221 1663139 256 4 4988 10207 107970 116308 256 8 12245 15838 230228 213858 256 16 13047 21426 434571 319584 256 32 14547 31694 713067 75916 256 64 8920 24069 809878 393772 256 128 8218 50694 510138 1248819 256 256 23109 148228 1384034 2639446 512 4 4715 5695 134522 129134 512 8 10829 15207 83223 234856 512 16 25746 41697 539595 403752 512 32 18446 50265 583110 365479 512 64 28298 45186 501536 804962 512 128 18602 56997 600223 438368 512 256 16748 67448 2055390 807687 512 512 15708 41524 641460 1354190 1024 4 7102 7283 131808 67120 1024 8 10913 18962 207699 130646 1024 16 19154 34494 553560 224364 1024 32 27607 43713 630148 519543 1024 64 17799 56847 838728 943781 1024 128 27128 39090 1004951 518790 1024 256 57161 76287 332999 267502 1024 512 25223 51133 1434138 245499 2048 4 16482 7321 95308 54450 2048 8 11086 10958 146611 112279 2048 16 13242 35132 322120 277849 2048 32 37785 60189 900619 808555 2048 64 32808 66314 433905 1117927 2048 128 45886 46234 384684 732192 2048 256 40780 85319 1102290 1655793 2048 512 31967 88237 1631886 828759 4096 4 6614 9433 65227 91678 4096 8 9374 17212 317148 112428 4096 16 16210 17141 370440 334200 4096 32 23808 50382 556905 696477 4096 64 28233 32347 192110 406193 4096 128 38020 76269 670700 495528 4096 256 37364 77776 832365 995887 4096 512 52750 49914 837805 392900 8192 4 8137 6901 86728 68051 8192 8 12582 17430 103746 119909 8192 16 23450 28036 124311 218208 8192 32 30030 18389 213996 226568 8192 64 33572 27508 659043 858418 8192 128 29609 41951 547706 581896 8192 256 38054 42313 1309900 644880 8192 512 38884 56438 1020430 447015 16384 4 8312 6564 59201 93776 16384 8 12968 12292 126708 124980 16384 16 19798 19637 218191 220638 16384 32 30163 49636 412301 499695 16384 64 54260 59945 605555 468436 16384 128 41920 44415 760416 598435 16384 256 40084 74131 696600 419029 16384 512 43854 60930 995807 649333 32768 4 7120 7929 96654 61101 32768 8 10115 9680 184322 185370 32768 16 19136 23199 292932 199333 32768 32 30078 37689 482472 361661 32768 64 31668 35559 609115 597584 32768 128 28944 43180 1009513 947790 32768 256 37846 58554 582904 619468 32768 512 37721 46939 786805 691364 65536 4