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 Dec 22 09:28:11 2025 Auto Mode Machine = Linux oleg105-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-oleg105-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 3022 16520 297664 297664 64 8 3875 29315 385790 383585 64 16 4371 45522 331481 451299 64 32 5024 24816 725882 500060 64 64 4111 80302 1421755 926260 128 4 6648 13151 274641 207141 128 8 6550 33533 458940 403721 128 16 7287 50653 592699 499970 128 32 7696 78183 766076 739689 128 64 8300 78768 978253 776042 128 128 12145 100786 1521718 1391557 256 4 2838 10319 240813 167646 256 8 16002 18020 91688 355096 256 16 6959 36962 251768 442268 256 32 13775 66081 889002 684869 256 64 10875 87553 973645 973645 256 128 17885 115782 1163562 1093639 256 256 11278 59270 1415041 1707589 512 4 12865 14526 289269 288958 512 8 17700 26420 451930 391461 512 16 29662 47863 591299 602412 512 32 30138 80793 851903 713970 512 64 18847 85677 873740 847867 512 128 20417 80593 1365383 1193175 512 256 24548 134278 1087440 1413929 512 512 14314 120497 1306409 583110 1024 4 6478 7820 154496 65872 1024 8 15490 12993 92828 441015 1024 16 14031 14528 603072 560788 1024 32 24199 55549 844168 624014 1024 64 35289 28747 1035229 892033 1024 128 31297 90418 1073257 866478 1024 256 18816 95692 1245710 1239598 1024 512 50105 129277 1587315 1456510 2048 4 4765 6174 219861 67866 2048 8 13627 22696 163918 347717 2048 16 17698 25750 212250 463648 2048 32 26937 28498 434739 174355 2048 64 41110 30408 1227693 551704 2048 128 34368 83968 887407 1229274 2048 256 52742 69069 455124 1335955 2048 512 39342 65079 1650385 1533970 4096 4 7556 6587 108933 169096 4096 8 8030 7936 291679 315442 4096 16 25461 27642 619567 528029 4096 32 32061 33136 408375 715088 4096 64 49221 36837 714107 859603 4096 128 33374 90691 985095 877652 4096 256 45710 59395 972217 1105539 4096 512 46046 47981 547813 539588 8192 4 11000 10385 104489 168351 8192 8 14149 13262 427669 121683 8192 16 19691 21271 558987 370041 8192 32 18059 25157 694531 359141 8192 64 35367 31722 715830 1021826 8192 128 39974 60518 1464434 1172655 8192 256 37267 66482 1171455 679949 8192 512 38704 59635 844265 906474 16384 4 9385 8740 70961 119060 16384 8 14119 17557 180512 224684 16384 16 21195 27567 321753 400057 16384 32 31834 37885 570334 497859 16384 64 33001 63874 922312 323354 16384 128 39279 44980 520508 307109 16384 256 51458 79680 381849 315860 16384 512 34741 65529 1448378 833197 32768 4 7577 9467 90520 148213 32768 8 8710 15994 267565 260762 32768 16 19195 20628 629187 386566 32768 32 21336 30795 644582 495831 32768 64 30035 43107 994933 263662 32768 128 34404 84056 1490066 964079 32768 256 48296 92223 933531 620736 32768 512 62692 82941 1426117 1251791 65536 4