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 18 20:38:05 2026 Auto Mode Machine = Linux oleg611-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-oleg611-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 3015 11212 503814 165823 64 8 3955 4470 754443 65046 64 16 5653 10408 361380 222250 64 32 3352 21326 1392258 695778 64 64 2691 51943 1562436 1734015 128 4 3618 13136 436904 535368 128 8 3794 8233 646205 814915 128 16 3276 9369 212975 89080 128 32 4445 12760 1007629 1152564 128 64 5673 56383 677178 542400 128 128 6599 71432 1487977 1939522 256 4 4480 12969 658008 556398 256 8 9886 17976 782721 435276 256 16 14094 32938 686182 1099237 256 32 12320 56725 1292410 790209 256 64 21839 31915 729045 447615 256 128 15882 73479 1430119 1543163 256 256 16431 94855 1743637 2135500 512 4 10840 11492 443621 506385 512 8 15474 14790 579804 730484 512 16 9609 17622 329025 835334 512 32 14540 20928 196695 373423 512 64 22043 48705 1239310 95486 512 128 20566 84334 1176828 1113374 512 256 17333 72124 1230786 1379416 512 512 18582 34827 1057974 1110496 1024 4 9425 5118 257603 321412 1024 8 9138 7973 201615 677781 1024 16 18052 22256 112552 354200 1024 32 24535 15712 62626 463979 1024 64 12343 40415 1475525 970656 1024 128 46497 79213 1140214 968904 1024 256 19880 56964 1170352 349473 1024 512 43604 88496 1521524 1083819 2048 4 4591 5947 385530 271835 2048 8 8941 9037 159005 314168 2048 16 14084 13985 608619 675691 2048 32 19043 17701 506040 1085299 2048 64 16380 28863 1235996 1081337 2048 128 21884 25599 428793 531660 2048 256 25174 66117 746638 514065 2048 512 48078 37491 1633127 624368 4096 4 6907 9317 367941 335683 4096 8 13677 9842 478217 287337 4096 16 21389 22510 831882 475727 4096 32 20327 27384 837968 765734 4096 64 16678 32296 546715 569363 4096 128 30070 25682 378312 767341 4096 256 19088 32101 552979 767616 4096 512 23365 41247 382831 388800 8192 4 4923 6088 406591 276822 8192 8 10638 11944 765611 422396 8192 16 16490 29959 289909 377530 8192 32 19630 28261 621605 468411 8192 64 34854 25811 439552 817003 8192 128 35794 35782 695473 382268 8192 256 33861 42646 959131 810776 8192 512 26209 60129 746905 886181 16384 4 5905 6169 148319 180842 16384 8 8094 8868 317211 204332 16384 16 15840 22937 397197 532260 16384 32 23686 30253 786526 836860 16384 64 33085 32621 485870 692654 16384 128 34001 52276 914177 574737 16384 256 37046 56818 345887 663047 16384 512 42861 62307 529010 681674 32768 4 5860 7178 219767 198813 32768 8 12406 12796 340882 270818 32768 16 18618 23502 480292 605167 32768 32