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: Wed Sep 16 19:44:41 2026 Auto Mode Machine = Linux oleg211-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-oleg211-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 2132 3559 555990 133895 64 8 2596 9950 718114 621657 64 16 4057 18348 789967 592827 64 32 3288 31069 1124074 866463 64 64 4331 6715 1357066 1518251 128 4 1611 2262 83006 143479 128 8 6768 17704 538051 669577 128 16 5621 12419 1102844 914904 128 32 6074 34991 1102844 280671 128 64 5135 42868 1142750 1085013 128 128 7227 36332 498114 1543594 256 4 5125 7164 369516 543445 256 8 7263 14295 748875 610842 256 16 10406 28670 897923 770920 256 32 12218 20641 1093639 965763 256 64 12358 17086 1036624 867455 256 128 11713 43767 538809 1152323 256 256 10562 62318 2486631 2747508 512 4 4698 5733 405353 170953 512 8 11321 16540 123370 592604 512 16 16999 32557 1233614 1267845 512 32 13216 25122 1007827 1014013 512 64 23966 61672 850554 536628 512 128 18671 59707 496206 728255 512 256 17525 82169 1520013 707152 512 512 19180 49292 955368 896725 1024 4 6672 9183 276082 203246 1024 8 5177 11375 362725 678102 1024 16 6179 13617 965203 355431 1024 32 7986 26535 151659 961529 1024 64 18538 26523 345815 446796 1024 128 30072 75349 1294520 1158358 1024 256 31303 43113 1460969 767670 1024 512 23233 63206 777537 1464956 2048 4 7997 6658 128497 180310 2048 8 6283 9975 619504 177776 2048 16 6373 16607 192027 321253 2048 32 9085 31297 490186 341225 2048 64 19227 12903 1177057 466392 2048 128 18970 32904 322774 899111 2048 256 20651 44322 285391 350741 2048 512 40131 73093 1509175 922576 4096 4 3715 4583 249922 148815 4096 8 14140 19914 535485 398366 4096 16 26053 21670 725967 437984 4096 32 24826 48334 1195553 209977 4096 64 20102 25181 489890 353591 4096 128 35787 50817 1399376 380668 4096 256 28907 34080 359902 230513 4096 512 15199 24437 282834 1350957 8192 4 1968 9746 410830 689320 8192 8 7797 14221 410090 416346 8192 16 18167 13791 616873 401685 8192 32 22518 32645 379331 938487 8192 64 34001 46364 711428 774010 8192 128 39130 56400 1695704 1400562 8192 256 23438 24226 697789 531080 8192 512 29378 42282 614556 369905 16384 4 3170 3595 356630 182971 16384 8 5209 7576 238029 276150 16384 16 6952 12597 510994 430684 16384 32 10199 27496 555934 347472 16384 64 17730 27776 827439 705938 16384 128 22794 26797 462039 364939 16384 256 25810 31187 473500 271347 16384 512 28867 50213 797276 763890 32768 4 5062 4480 179450 113365 32768 8