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: Sun Nov 16 18:41:25 2025 Auto Mode Machine = Linux oleg457-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-oleg457-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 6366 14295 213925 232652 64 8 4830 30145 508587 385790 64 16 3103 38006 659861 566551 64 32 2731 59051 889431 809014 64 64 6989 12723 1204796 1226821 128 4 4406 11938 277050 257022 128 8 6881 29851 425141 380003 128 16 6133 29809 576780 166223 128 32 13305 37394 883293 757430 128 64 4782 56412 360605 962469 128 128 10767 115834 1319723 1705404 256 4 5082 4591 228173 235118 256 8 8139 15492 502969 211749 256 16 10458 19622 690151 591330 256 32 18884 63743 790209 799625 256 64 7505 95564 901693 966633 256 128 18611 125308 1219045 1319408 256 256 18352 101021 1334162 1487577 512 4 11798 17694 260401 161868 512 8 17690 30142 365977 232718 512 16 10070 23995 382331 279009 512 32 19680 66107 709254 557671 512 64 26705 112252 849208 289777 512 128 12997 64257 1343179 1087440 512 256 18339 144916 1340664 680702 512 512 16823 137449 1610042 1657257 1024 4 9068 18412 191689 228677 1024 8 11319 18505 220121 356050 1024 16 21449 37250 425420 628580 1024 32 23864 38101 860403 920914 1024 64 24517 73426 1050420 870871 1024 128 35700 125691 1458984 1162119 1024 256 37571 121108 1162433 1345623 1024 512 56712 121488 234213 1400926 2048 4 6707 13115 235535 231517 2048 8 15545 23850 354944 289342 2048 16 20804 32934 753515 649974 2048 32 28207 51795 821468 779924 2048 64 25157 63343 236703 1045919 2048 128 58247 81202 1070022 700886 2048 256 74660 66163 1594920 1378181 2048 512 35373 60004 289264 745019 4096 4 8463 7556 214237 233365 4096 8 10616 13539 451343 296742 4096 16 19403 19599 286336 218966 4096 32 33100 24417 344259 356230 4096 64 29213 40282 1044889 874480 4096 128 28801 47811 1313264 532712 4096 256 29390 55400 1407055 363219 4096 512 33594 65589 479632 710240 8192 4 10097 2312 184276 245562 8192 8 12331 18494 472846 331191 8192 16 23705 16748 327183 215562 8192 32 23607 31533 857518 711237 8192 64 28581 35091 188603 588001 8192 128 31403 54969 853874 890429 8192 256 39113 60382 469268 939771 8192 512 37785 78979 1316222 810527 16384 4 10009 9721 195422 152717 16384 8 18642 18000 337411 367832 16384 16 20302 25694 627524 504526 16384 32 20279 35787 802190 522280 16384 64 32354 51471 646158 696423 16384 128 40733 56309 1063689 809370 16384 256 46555 86354 1124966 909916 16384 512 44456 88627 726238 370755 32768 4 9143 10743 185363 133669 32768 8 12251 14931 362521 140367 32768 16 19297 27830 562145 265696 32768 32 22963 40785 768464 665812 32768 64 44390 40218 365632 488375 32768 128 36065 62354 1259096 881500 32768 256 49543 65001 523459 318578 32768 512 43546 68474 447656 596334 65536 4