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 Sep 11 10:23:42 2026 Auto Mode Machine = Linux oleg607-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-oleg607-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 2557 8610 673098 491815 64 8 5038 17039 771797 560635 64 16 2698 26499 220606 207798 64 32 2469 50083 1226821 312204 64 64 2488 32937 130574 1638743 128 4 4101 7390 590094 295015 128 8 4679 18929 595328 715059 128 16 4310 36499 329812 795593 128 32 5404 31534 194250 852438 128 64 8934 58881 425478 718889 128 128 10286 66660 907174 1294270 256 4 4868 9135 278257 238566 256 8 6824 19769 174512 744204 256 16 10684 16888 759469 903970 256 32 11256 52136 1175022 281910 256 64 15995 36472 1447470 1185399 256 128 13866 38947 1495866 1463250 256 256 13668 115421 1579483 1778290 512 4 7518 12011 287951 539053 512 8 13178 15022 622133 477239 512 16 11747 27693 606667 591951 512 32 18946 27642 551654 1064266 512 64 20064 32764 200328 1207940 512 128 22230 64751 746222 473660 512 256 20606 54543 796306 1005467 512 512 27679 81840 392320 3393590 1024 4 7494 11945 408468 299597 1024 8 13741 11652 215126 689090 1024 16 11939 17191 298618 522387 1024 32 22231 48345 909410 716567 1024 64 18476 34007 1294520 798646 1024 128 22337 49518 529797 1324460 1024 256 22031 71698 583174 1117664 1024 512 19325 46708 1558516 166640 2048 4 10553 6398 403855 394218 2048 8 12884 13891 502076 413976 2048 16 20758 26414 396913 333994 2048 32 26959 55363 971074 1184523 2048 64 25658 49674 1015382 661690 2048 128 23336 46647 1013345 1229274 2048 256 21558 40655 936456 611000 2048 512 24450 72999 1569280 646257 4096 4 6220 6355 313823 222198 4096 8 12489 13650 356385 722912 4096 16 18230 23281 476995 522855 4096 32 22740 28952 951645 315906 4096 64 40757 68475 462672 520447 4096 128 36736 51846 1314872 842612 4096 256 28087 62984 1172222 1100793 4096 512 45204 68966 1059778 889282 8192 4 8093 9021 352542 316893 8192 8 13827 23314 419155 224487 8192 16 18734 24602 710134 525934 8192 32 35232 30703 637367 532364 8192 64 32096 45309 851652 650520 8192 128 36719 60170 922735 767407 8192 256 39748 69324 1444790 811484 8192 512 43896 73174 1368542 750117 16384 4 3855 7889 528754 335552 16384 8 10977 16410 304173 361670 16384 16 19474 22165 559582 459668 16384 32 25844 31627 692012 480086 16384 64 32067 39933 521420 1090823 16384 128 45414 50997 785951 545857 16384 256 34165 52637 754920 836901 16384 512 40420 67181 883240 834553 32768 4 7539 8008 270010 298833 32768 8 10842 12198 495322 506131 32768 16 19654 18045 438091 435913 32768 32 20151 23107 804834 521509 32768 64 23961 32888 611364 678162 32768 128 32535 39279 517645 673575 32768 256 34193 48779 688389 927539 32768 512 34118 44930 975063 795245 65536 4