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 14 18:41:22 2026 Auto Mode Machine = Linux oleg604-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-oleg604-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 2035 7811 450541 303383 64 8 3460 8580 952555 674790 64 16 3509 21353 1255511 293434 64 32 4119 13071 1392258 1124074 64 64 3472 16248 1363961 1255511 128 4 4976 6965 621518 506097 128 8 5312 11252 948860 568836 128 16 6801 22039 325809 646205 128 32 7044 58097 992724 1133103 128 64 9494 77205 976473 1281909 128 128 10229 82955 1521718 1684006 256 4 3536 9092 606700 318825 256 8 10051 14531 336405 836374 256 16 5919 8888 965763 991629 256 32 6873 43828 1103757 591330 256 64 13941 23119 1532153 1280084 256 128 11785 49381 759469 1398455 256 256 9168 33481 917096 1855098 512 4 5056 8580 318013 532239 512 8 7954 14799 507462 704137 512 16 17620 25753 1040545 431671 512 32 15161 19831 915847 668413 512 64 11481 37674 760762 750919 512 128 14020 50557 846197 591951 512 256 13381 31860 898225 808904 512 512 26322 75640 1446306 1999881 1024 4 8062 8787 573978 165881 1024 8 7795 14222 510224 267302 1024 16 10674 17716 785213 335838 1024 32 8192 19546 199925 503642 1024 64 23118 42592 776975 692870 1024 128 17737 47738 349844 479573 1024 256 22362 36800 1091532 1233545 1024 512 18920 80061 1306332 785788 2048 4 6218 4738 259963 472654 2048 8 7639 9406 310253 385686 2048 16 26181 24573 618880 733505 2048 32 28600 27981 1277730 876720 2048 64 34523 57317 1055688 620803 2048 128 29320 36238 568764 619281 2048 256 44787 76227 994688 1513696 2048 512 27395 40969 743923 1627866 4096 4 7595 10094 376819 321884 4096 8 11074 9867 342844 434078 4096 16 16454 13506 597419 377266 4096 32 20346 22083 575196 412572 4096 64 51586 54066 1073687 507562 4096 128 26035 42790 256061 425910 4096 256 32356 66109 1085903 430391 4096 512 60044 44862 357327 598918 8192 4 6431 6746 456299 388927 8192 8 10100 13183 319263 251434 8192 16 15647 21705 694124 768694 8192 32 14700 19943 564303 328321 8192 64 29345 34484 1020066 710120 8192 128 26203 40388 1051470 451419 8192 256 34569 50940 878208 906187 8192 512 39535 63241 523714 576130 16384 4 6444 7159 394196 408760 16384 8 10481 11661 322564 385259 16384 16 14943 22328 411368 659845 16384 32 30555 28458 760517 346641 16384 64 26594 37728 820797 564598 16384 128 35843 53818 690815 682012 16384 256 36469 42415 1124579 809847 16384 512 38852 57361 930794 476279 32768 4 6869 7268 285211 215526 32768 8 11576 12429 319205 260158 32768 16 15613 18533 416423 360647 32768 32 22661 24217 694972 720666 32768 64 32334 37683 680243 763482 32768 128 31103 39183 1178491 855204 32768 256 41394 45972 754103 1087558 32768 512 36190 51907 679056 743846 65536 4