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 Aug 19 06:46:51 2026 Auto Mode Machine = Linux oleg444-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-oleg444-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 4148 4654 335206 454354 64 8 3759 8125 571375 587635 64 16 3192 11862 681644 811459 64 32 4406 54517 1163036 528618 64 64 1721 27305 1066042 471099 128 4 6403 3748 617941 477725 128 8 3971 20170 718889 383258 128 16 7857 25112 877518 715059 128 32 8804 42555 165557 955616 128 64 6645 74546 670413 960747 128 128 3796 63274 1363288 358677 256 4 7298 7823 274698 310257 256 8 6213 10505 391475 384880 256 16 16540 25361 1027695 248275 256 32 14152 56015 1280084 1040643 256 64 16292 102272 615393 308829 256 128 16514 74592 265856 1112909 256 256 10913 81425 924200 2131261 512 4 3284 11790 134488 496550 512 8 7754 6554 267372 488975 512 16 16478 9051 677267 251614 512 32 20570 31946 999850 578554 512 64 19644 41003 1064794 949875 512 128 12243 61932 1251589 1292259 512 256 26360 44130 695472 1057454 512 512 24836 60108 303496 1270094 1024 4 4964 5901 175974 281640 1024 8 5492 9519 755782 201937 1024 16 9940 8997 251420 366096 1024 32 11316 10235 782210 309730 1024 64 14407 39308 551782 291999 1024 128 17195 41901 1027060 340767 1024 256 28951 51077 649688 194528 1024 512 26667 73142 947320 738245 2048 4 4423 5869 332147 521240 2048 8 9337 8480 514188 394380 2048 16 10389 11676 653236 273758 2048 32 25177 27901 208829 519411 2048 64 18530 34053 1207501 296002 2048 128 24053 43385 1438174 423070 2048 256 27999 48173 1018391 619504 2048 512 31667 69494 851179 352309 4096 4 5314 5086 328362 234218 4096 8 9744 1302 543962 511872 4096 16 10613 13921 424238 380600 4096 32 16060 22255 417871 519346 4096 64 16918 22018 294529 282559 4096 128 18175 32162 687117 518093 4096 256 29839 32752 334252 262681 4096 512 27891 37310 486285 586067 8192 4 4796 3982 136754 168358 8192 8 7133 8459 408311 329884 8192 16 14056 17594 674688 355507 8192 32 11301 27888 381517 674079 8192 64 22443 32681 516588 668297 8192 128 20019 23102 382911 390838 8192 256 24016 40398 597427 458448 8192 512 30655 46379 792122 373228 16384 4 4268 7740 404713 333883 16384 8 8133 9438 502574 428565 16384 16 10334 13015 260979 238858 16384 32 12000 18078 601315 550148 16384 64 22803 27206 457666 382053 16384 128 23837 37317 983142 586584 16384 256 28520 40039 512366 501269 16384 512 31026 57806 1283904 989142 32768 4