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 15 17:23:07 2026 Auto Mode Machine = Linux oleg658-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-oleg658-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 2164 5509 500060 438043 64 8 1824 16364 771797 673098 64 16 4282 28880 852702 771797 64 32 3001 32420 492717 913649 64 64 2059 8569 1204796 1599680 128 4 2235 2656 47074 75204 128 8 3142 4408 681476 416888 128 16 6054 8670 393656 785122 128 32 7357 25301 1229084 978253 128 64 8252 75288 1017175 978253 128 128 6147 15630 1377278 2166499 256 4 4764 2088 273230 178279 256 8 7309 9555 656399 853662 256 16 8968 27420 913973 277969 256 32 5956 26550 792543 346949 256 64 6688 45714 1190657 639967 256 128 9227 33001 126668 1190657 256 256 13035 29513 1497953 2077650 512 4 9168 9562 539459 369949 512 8 10042 17485 328020 515131 512 16 15908 14095 485767 756474 512 32 9263 11825 362334 893740 512 64 14270 57535 463738 953671 512 128 19479 61509 1433753 1402845 512 256 13348 54578 1471074 1422357 512 512 8732 21900 1073309 1471074 1024 4 6846 4839 64149 120089 1024 8 4678 3555 723203 258315 1024 16 17898 18273 610270 559546 1024 32 31106 60984 674587 1633188 1024 64 27090 58410 1506051 858340 1024 128 14812 20128 600543 386418 1024 256 13864 34440 347579 1104727 1024 512 15413 46969 1019987 288624 2048 4 3948 6337 851263 294935 2048 8 6480 11775 493963 313629 2048 16 8264 7051 976150 223336 2048 32 8122 10930 194400 1058420 2048 64 11148 35380 405936 471772 2048 128 14965 21477 559247 625504 2048 256 11062 15571 831165 1306095 2048 512 29098 38214 586471 288245 4096 4 5373 4520 148057 336676 4096 8 13862 8268 352893 240841 4096 16 14363 11962 582727 690015 4096 32 21898 29643 431982 338874 4096 64 16168 18006 843315 397628 4096 128 28986 34772 652314 911021 4096 256 27979 36893 318306 413158 4096 512 23515 32839 327892 456428 8192 4 5856 5677 224758 288004 8192 8 9841 8781 314301 328468 8192 16 14289 17447 345699 266613 8192 32 28574 22088 673353 518999 8192 64 20950 44590 745738 840712 8192 128 32159 39483 606282 359231 8192 256 32818 44224 776336 421422 8192 512 40374 74940 1198882 896680 16384 4 6104 5824 173039 290512 16384 8 7574 7154 254027 219777 16384 16 10595 10967 533040 410555 16384 32 18672 25086 404154 372491 16384 64 22784 19253 919880 262589 16384 128 22605 35093 606233 353293 16384 256 32091 34478 987110 481698 16384 512 40075 34084 262320 311964 32768 4 6320 6793 237628 201207 32768 8 7044 8068 359294 244539 32768 16