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: Sat Aug 29 05:25:13 2026 Auto Mode Machine = Linux oleg623-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-oleg623-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 1541 8002 587635 541412 64 8 2473 13111 901377 735831 64 16 2335 11240 955947 969761 64 32 4862 38486 1460430 1105556 64 64 2765 29560 320021 2006158 128 4 2470 7521 643108 294853 128 8 4431 9493 921183 715059 128 16 6933 24072 498114 637004 128 32 7292 62471 1319723 397444 128 64 4162 16114 1406136 1306873 128 128 8522 40366 1543594 2066432 256 4 5074 6134 423265 323727 256 8 8154 11461 963164 63762 256 16 6234 18126 455592 879535 256 32 14478 41619 1280084 1274008 256 64 7850 66044 1280084 1093639 256 128 8628 53644 1579483 1079348 256 256 8603 85763 1312954 1704877 512 4 6416 4717 326971 113552 512 8 5452 9866 966113 453456 512 16 7166 23014 861818 1084694 512 32 11044 39603 1418599 846197 512 64 8524 25028 1350783 899731 512 128 20806 58817 1351633 1434711 512 256 22735 76622 1555239 1695195 512 512 22414 56104 1616100 2073249 1024 4 5577 3983 393103 576211 1024 8 5999 11305 493742 751287 1024 16 17855 22419 742071 70256 1024 32 20595 15416 439481 182859 1024 64 20735 60566 807050 989212 1024 128 30030 69291 809484 910373 1024 256 32858 88889 1695065 1466957 1024 512 20664 92957 1530742 1292961 2048 4 4903 5701 518346 215492 2048 8 15767 6979 157115 809469 2048 16 25191 19777 681102 454498 2048 32 12617 25859 1164293 322362 2048 64 12396 36156 667967 692356 2048 128 36701 22541 861594 577404 2048 256 29823 60077 950339 500613 2048 512 28850 59647 888141 579000 4096 4 4487 5371 182166 499199 4096 8 5785 10807 302399 423673 4096 16 20904 21445 355273 548390 4096 32 13362 24439 899055 484392 4096 64 28291 19720 608615 242829 4096 128 19617 30598 279225 334318 4096 256 25445 38622 923559 513340 4096 512 25824 63947 533755 303720 8192 4 7900 9174 348444 290662 8192 8 2581 10932 607536 568297 8192 16 12484 14307 557084 608807 8192 32 26013 50429 515317 361979 8192 64 33939 29398 596649 618261 8192 128 37025 57916 941084 895302 8192 256 40232 28652 673194 555840 8192 512 27961 39663 303328 228597 16384 4 5944 5919 146341 207429 16384 8 9591 7094 741656 355371 16384 16 6044 10954 336061 264526 16384 32 11339 15772 244278 326193 16384 64 15874 31795 774733 482279 16384 128 21832 28260 729507 633080 16384 256 28170 24966 598696 355338 16384 512 21744 26795 653482 709693 32768 4 7012 9416 528465 344980 32768 8 15142 10833 380364 467920 32768 16 12975 16849 540709 320008 32768 32 17685 22648 454984 337441 32768 64