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 Jul 14 12:24:28 2026 Auto Mode Machine = Linux oleg212-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-oleg212-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 2850 10548 659861 582535 64 8 3873 24604 866463 780776 64 16 3318 18302 913649 763021 64 32 5230 26447 1255511 1105556 64 64 6608 40126 1279447 1304314 128 4 4342 9713 684954 637004 128 8 6637 17774 1185654 715059 128 16 2665 7108 953918 1007629 128 32 3401 9970 1175271 1142750 128 64 4475 16163 1424795 590094 128 128 9552 51757 1074159 2066432 256 4 2838 2954 630572 538809 256 8 2332 5268 555535 723153 256 16 6746 13221 1137672 367366 256 32 11353 27173 1362952 652807 256 64 10895 48522 1463250 1384034 256 128 14150 50273 396975 1543163 256 256 15577 81246 1967260 2719671 512 4 6228 9239 627587 582478 512 8 6063 8311 516122 820650 512 16 12991 27357 357032 304572 512 32 18739 35030 1142396 637650 512 64 21803 60100 1245780 891884 512 128 24720 81918 458785 1496706 512 256 15698 40169 2039772 1147892 512 512 18417 105699 2370799 3366987 1024 4 8115 9084 907105 796868 1024 8 23494 17572 1122924 745291 1024 16 27852 57041 1675884 1019019 1024 32 13153 72764 932511 1120580 1024 64 41941 53573 1440391 400769 1024 128 33671 112378 345704 1064479 1024 256 31428 38564 1009913 1021928 1024 512 23499 138133 2348509 1376677 2048 4 5767 4876 145775 347000 2048 8 12238 22270 487598 303404 2048 16 27361 15188 1751687 283572 2048 32 21078 44422 633485 866374 2048 64 29808 29341 1574169 519129 2048 128 24105 30246 668175 428365 2048 256 20475 35991 1282499 1290398 2048 512 37207 87097 1651337 1603555 4096 4 4016 3799 179948 153805 4096 8 11470 9534 574792 496057 4096 16 18103 26370 564351 558789 4096 32 24885 21811 428951 429799 4096 64 20247 30508 265770 1263801 4096 128 33433 36736 702687 648717 4096 256 16096 64923 736296 539301 4096 512 23817 39786 394225 1382484 8192 4 4751 4886 363426 324023 8192 8 6602 2244 629082 619710 8192 16 11378 13863 496938 571673 8192 32 48619 43663 707619 764895 8192 64 19931 24512 1335094 1042632 8192 128 41522 36103 1259345 994901 8192 256 31063 55338 1056221 963218 8192 512 37630 53485 1274054 792341 16384 4 7913 14555 742128 511553 16384 8 21013 20057 588866 544210 16384 16 16857 11041 294358 224232 16384 32 17631 23908 728046 521301 16384 64 25949 41644 1616555 1359010 16384 128 58606 57816 1163734 1000067 16384 256 65587 78293 691740 585684 16384 512 22560 47196 1055666 760391 32768 4 5860 5978 159625 212310 32768 8 8495 13316 496747 316917 32768 16 16966 21213 375986 309997 32768 32 22220 33104 736177 701159 32768 64 32308 36738 1121998 841738 32768 128 38512 46286 1373636 725371 32768 256 35300 46819 1252464 1098055 32768 512 42095 44075 1206082 942396 65536 4