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 26 23:06:15 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 1141 1222 233461 474430 64 8 3007 9367 720041 627470 64 16 4462 35517 955947 137320 64 32 3664 8896 1255511 929467 64 64 3993 31794 1226821 2133730 128 4 2693 9553 456986 223807 128 8 4452 16651 847059 656477 128 16 3675 9173 1114289 848397 128 32 10390 31473 1114289 731625 128 64 7700 55098 1162547 1281909 128 128 10578 61358 1451764 2004703 256 4 5979 8993 598249 471393 256 8 3213 8150 420942 690151 256 16 9795 28303 988889 527947 256 32 4953 27723 744204 944525 256 64 12799 48978 1254656 984356 256 128 9164 50503 321980 185903 256 256 8578 135816 2509882 2015259 512 4 3845 5101 346155 115837 512 8 7991 12083 445184 1040545 512 16 11721 14632 1267097 1000315 512 32 19182 45273 934580 999850 512 64 23139 19765 269757 652967 512 128 20985 43779 1319250 358582 512 256 14474 68706 1155924 1350783 512 512 14181 64631 1542947 2169601 1024 4 3822 4334 472763 533880 1024 8 10130 17364 301977 165268 1024 16 10133 14898 746327 274828 1024 32 17970 27275 1010864 582462 1024 64 24665 19834 551711 375374 1024 128 17527 66081 1396825 934337 1024 256 30894 63468 355549 1370965 1024 512 18569 38210 895194 851195 2048 4 3001 3253 314594 398146 2048 8 14504 8111 366890 223511 2048 16 18014 12643 392937 404502 2048 32 20987 22939 1434092 471021 2048 64 18979 46907 665793 1177057 2048 128 30406 38979 207687 210548 2048 256 14403 48135 732754 916767 2048 512 27144 66701 432071 651008 4096 4 3516 4568 293980 352134 4096 8 12112 9272 242654 284087 4096 16 15511 25622 469231 421573 4096 32 27589 41607 441803 414114 4096 64 19112 42998 1005858 1529028 4096 128 26354 48393 1109394 406635 4096 256 53225 45282 781371 739879 4096 512 37475 46667 951223 451545 8192 4 6249 2520 309600 288817 8192 8 9997 12533 542081 445577 8192 16 14717 19291 352419 804474 8192 32 16727 24610 590324 541722 8192 64 20192 31506 515634 681527 8192 128 20310 33743 754664 655998 8192 256 31735 43147 947154 815858 8192 512 25387 36740 1205613 1345182 16384 4 5407 5631 406913 372635 16384 8 8347 10608 490069 281314 16384 16 14976 19189 1149524 616263 16384 32 21137 24475 557942 621076 16384 64 17425 23746 850448 662811 16384 128 23995 31330 396457 308050 16384 256 24961 43663 954678 995619 16384 512 31391 43984 758511 676380 32768 4 5205 4457 373058 174429 32768 8 5238 8154 406339 238094 32768 16