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: Thu Oct 1 19:21:10 2026 Auto Mode Machine = Linux oleg256-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-oleg256-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 2211 4270 645579 473593 64 8 2556 5959 429630 725882 64 16 1250 7988 877797 821391 64 32 2058 37471 106826 1210227 64 64 2495 28056 1599680 1421755 128 4 4461 7611 581781 556454 128 8 4602 21216 795593 695603 128 16 3762 60953 1076312 942199 128 32 2902 20775 983630 757430 128 64 7126 81842 1065630 1266785 128 128 5038 44031 457376 883293 256 4 5231 7396 411583 615393 256 8 9774 17970 1549845 812944 256 16 8324 30008 1163562 322366 256 32 3993 17566 1219045 1035624 256 64 12113 49295 969251 552960 256 128 12080 58687 1422540 1561112 256 256 11922 53703 827989 2480886 512 4 6895 7672 144672 418628 512 8 5553 12966 472825 674502 512 16 8991 29109 1011625 640694 512 32 17564 41420 856319 602919 512 64 7320 43246 948197 875164 512 128 20516 55676 746222 1132755 512 256 13161 54994 1225169 81295 512 512 19333 24249 2097550 1875849 1024 4 8806 3819 294260 76571 1024 8 19887 15478 445822 331406 1024 16 20635 22231 1185209 390991 1024 32 26755 44133 1114185 1712639 1024 64 13148 51238 987392 935151 1024 128 33033 30315 336390 1039740 1024 256 16803 25770 1155864 168477 1024 512 29524 57277 915028 878890 2048 4 5049 7450 98946 219535 2048 8 6340 10787 325600 211638 2048 16 8159 15570 636583 539948 2048 32 12674 32806 575933 210306 2048 64 25935 28752 287233 226022 2048 128 14440 10815 1400653 136889 2048 256 10188 27921 704739 339915 2048 512 18238 27688 401890 394997 4096 4 4517 8606 736170 539860 4096 8 23858 11969 885432 584651 4096 16 11288 10103 271045 314760 4096 32 15253 13489 630643 628015 4096 64 20261 27840 384967 147412 4096 128 21656 29259 1396532 747737 4096 256 53361 27344 611714 345804 4096 512 44057 66995 817901 681097 8192 4 2208 5689 303867 91497 8192 8 9645 11256 310184 278070 8192 16 18701 16899 619576 384979 8192 32 35805 25443 609703 292717 8192 64 21339 25955 586736 474839 8192 128 26088 39019 1182298 501135 8192 256 27340 31446 574915 363796 8192 512 18897 43120 902190 350460 16384 4 4873 4898 256609 116813 16384 8 7017 6828 244533 202935 16384 16 13562 15395 471334 364672 16384 32 17202 18519 703503 434496 16384 64 16099 33329 1030434 825143 16384 128 21882 31393 924981 784712 16384 256 21005 33819 1088576 833369 16384 512 31958 41468 1039459 931274 32768 4 6610 5858 211272 208023 32768 8 10509 10600 249746 297499 32768 16 19544 17841 651997 318767