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: Mon Sep 21 09:17:14 2026 Auto Mode Machine = Linux oleg318-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-oleg318-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 1644 4415 546928 492717 64 8 4166 31341 752329 347801 64 16 4645 30404 844652 889431 64 32 3293 52760 1279447 983980 64 64 5372 79706 1210227 1933893 128 4 6096 9012 549618 571865 128 8 10471 20775 472262 684081 128 16 3484 8450 1133103 650117 128 32 10582 46362 1183041 646205 128 64 4436 20779 1065630 1243315 128 128 2841 68743 1451764 1220700 256 4 4772 7777 648470 549283 256 8 9457 9367 907792 562520 256 16 9297 30780 1137672 833776 256 32 17066 65874 1202660 773140 256 64 24205 42147 1339154 1321031 256 128 24511 109122 1534342 1600674 256 256 9151 76098 1066483 1897721 512 4 4351 5357 68356 203421 512 8 3505 9773 712076 243346 512 16 12645 30163 110083 363130 512 32 23174 23494 986076 511938 512 64 26848 53939 335292 541773 512 128 29460 46520 288105 936209 512 256 22118 79948 1533034 1493584 512 512 34156 95060 731480 236825 1024 4 4236 6846 246457 216351 1024 8 7414 13884 255929 417440 1024 16 22172 29723 364017 842678 1024 32 12910 33738 450309 1039489 1024 64 18797 31812 603072 1071116 1024 128 18354 38613 390991 1278338 1024 256 33902 44906 1357961 588206 1024 512 32707 119335 1648862 1809317 2048 4 6394 9005 202694 280425 2048 8 7325 11317 264055 772837 2048 16 14903 12916 258291 868213 2048 32 17320 33454 560634 933099 2048 64 28749 31752 314490 321554 2048 128 28030 43564 275417 1231566 2048 256 36755 55316 1451540 956583 2048 512 27892 52545 1006813 861594 4096 4 6903 6768 189514 227922 4096 8 14683 11574 236052 284817 4096 16 1373 18551 448879 370010 4096 32 15386 17534 210082 301799 4096 64 17302 28749 499693 703176 4096 128 23890 42623 479177 330161 4096 256 29352 32653 612542 462038 4096 512 25452 31861 757529 484433 8192 4 4954 6322 192052 214449 8192 8 6848 11230 247260 232173 8192 16 15350 20289 438873 537216 8192 32 29445 32771 638706 264548 8192 64 23355 33987 1051470 414808 8192 128 34991 31634 863856 778482 8192 256 25503 45783 927443 321745 8192 512 28974 54755 960257 737083 16384 4 7847 6797 536972 180363 16384 8 8726 10013 242564 291275 16384 16 23915 36122 583477 508770 16384 32 15968 23853 727176 410381 16384 64 23935 27564 239816 658890 16384 128 28586 41783 755899 932082 16384 256 28509 39495 369267 504560 16384 512 34379 66198 711758 767834 32768 4 5961 5311 185293 210102 32768 8