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 Sep 5 00:28:27 2026 Auto Mode Machine = Linux oleg605-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-oleg605-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 3970 11830 603489 113273 64 8 3096 13456 874936 789967 64 16 4580 24399 1049372 1002351 64 32 4113 37492 901377 799377 64 64 5425 66120 256923 752329 128 4 4957 5608 164341 621518 128 8 7450 10874 883293 790905 128 16 6669 17314 1196221 1065630 128 32 5619 57018 927549 831319 128 64 8723 35418 1363288 1254941 128 128 9040 48086 460120 1967960 256 4 6595 8961 498995 249023 256 8 7590 19190 509895 826078 256 16 11088 21327 545931 494400 256 32 7382 19975 1398455 1243036 256 64 10845 18440 658008 862577 256 128 8286 47249 859127 713067 256 256 7042 102732 1415041 1534342 512 4 4487 9137 207791 138754 512 8 9337 15148 710897 191760 512 16 12954 29260 662434 833713 512 32 25204 63871 1038532 1060063 512 64 18367 38203 828566 1322500 512 128 17751 23738 1248678 1115109 512 256 17447 73954 1882427 1701913 512 512 23350 75918 1069035 2049505 1024 4 10177 7997 633213 234277 1024 8 13158 18999 909410 313048 1024 16 15460 17061 508954 480539 1024 32 14802 42734 631259 625559 1024 64 23168 44252 1250425 1116792 1024 128 13013 36744 1321200 1291406 1024 256 27184 51457 1273788 1313122 1024 512 38774 77847 1307923 1523683 2048 4 10513 7575 295269 272628 2048 8 11498 10171 312772 288816 2048 16 11599 17821 639426 418474 2048 32 20161 22270 893499 298408 2048 64 26768 53840 652244 1295458 2048 128 19794 48150 859783 532253 2048 256 27201 52270 1490323 981840 2048 512 46653 64890 328263 1213300 4096 4 5923 8992 234109 401766 4096 8 11814 9918 250750 442428 4096 16 20452 21781 844725 572627 4096 32 19734 19881 509957 450846 4096 64 36234 31327 1536412 690736 4096 128 40961 59559 1012378 970844 4096 256 38821 71287 623910 726243 4096 512 59707 72119 888132 657683 8192 4 7616 7291 374232 364266 8192 8 10215 12643 463089 395672 8192 16 15088 16723 878859 763112 8192 32 20473 20359 444470 809744 8192 64 21489 29745 838823 662576 8192 128 40298 40643 990827 628944 8192 256 43503 42125 761961 703850 8192 512 21709 34493 701307 658411 16384 4 6879 6772 232875 151201 16384 8 12184 12357 480032 392562 16384 16 13432 17249 454542 352815 16384 32 22536 27847 555633 559050 16384 64 22585 41825 635433 490349 16384 128 47890 51361 1016367 802940 16384 256 43686 51486 596689 434460 16384 512 42732 52968 1069583 754812 32768 4 6637 6870 310417 295638 32768 8 10840 11350 400268 319357 32768 16 16556 17601 684491 440809 32768 32 20609 26213 800759 548114 32768 64 23892 25963 345654 597587 32768 128 24733 39853 854561 768516 32768 256 30027 37465 828081 534324 32768 512 25886 39724 1123309 662140 65536 4