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 Jun 12 10:00:31 2026 Auto Mode Machine = Linux oleg128-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-oleg128-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 5468 8116 695778 520419 64 8 1550 5232 236131 603489 64 16 7593 15045 1163036 913649 64 32 8059 58664 983980 1002351 64 64 2141 53422 1232453 2801873 128 4 5020 8652 371073 506097 128 8 6208 19329 889145 615109 128 16 11251 50330 1102844 761728 128 32 13634 50591 1504659 848397 128 64 6645 53405 1130717 1024942 128 128 10748 89021 1526043 2175277 256 4 10223 6551 398153 535583 256 8 4521 6077 785584 682691 256 16 8406 24360 1168627 1032636 256 32 18863 59494 1354356 1157291 256 64 27678 72811 1552085 1152323 256 128 11669 33755 344059 1534342 256 256 11362 89071 1829808 269526 512 4 6996 6985 304745 524056 512 8 10366 15335 484780 844865 512 16 7585 26554 315490 907717 512 32 11326 25682 1350783 1130370 512 64 33837 66781 1225169 136967 512 128 32604 76611 1574625 1201856 512 256 40499 172159 373488 1662389 512 512 38699 64808 1834193 944860 1024 4 11332 13364 449132 386279 1024 8 17550 18690 458139 601973 1024 16 26103 30024 980853 1011817 1024 32 39134 67284 1296083 1081363 1024 64 27632 70595 1494522 925877 1024 128 42846 107562 1149368 1331440 1024 256 54590 111254 1622698 209963 1024 512 25214 42971 230307 1869160 2048 4 8259 4065 111044 606985 2048 8 7688 9668 1064981 1073365 2048 16 22452 18071 484956 994112 2048 32 35351 21722 477276 328677 2048 64 28350 22250 1302925 718894 2048 128 18732 42014 1055170 810386 2048 256 41470 64245 1100454 1179805 2048 512 34680 59091 1793004 403552 4096 4 5567 9016 443193 337119 4096 8 10013 18452 268536 448586 4096 16 14898 23074 766041 551736 4096 32 24733 31975 1422197 340088 4096 64 30910 49237 465241 675792 4096 128 27273 32607 570138 363219 4096 256 40370 70710 1683507 1409479 4096 512 39451 42246 974091 1508619 8192 4 5410 4413 475476 302822 8192 8 9622 9838 188860 178382 8192 16 13494 13906 408865 259817 8192 32 24363 20977 546609 498206 8192 64 22010 30888 796732 358463 8192 128 25727 20304 1125412 407541 8192 256 25580 31961 1015004 699922 8192 512 30838 43211 853789 507748 16384 4 3936 6526 444056 427379 16384 8 11259 9290 393157 353979 16384 16 13291 14762 917975 636540 16384 32 21512 32993 751247 633634 16384 64 29940 27414 729089 854052 16384 128 33633 50857 1147106 796924 16384 256 31251 42582 478238 675821 16384 512 27680 44571 906591 828346 32768 4 4051 5598 299867 354539 32768 8 8545 8785 408241 206824 32768 16