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: Sun Sep 6 21:35:28 2026 Auto Mode Machine = Linux oleg204-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-oleg204-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 3704 3280 592827 512471 64 8 2008 10645 673098 587635 64 16 2772 9547 998622 942521 64 32 3294 31592 1255511 166233 64 64 4290 44014 1143223 1562436 128 4 5200 10529 240124 617941 128 8 4363 11230 554157 731625 128 16 5916 25858 1111981 246632 128 32 4272 65714 1487977 346859 128 64 6686 107658 1175271 299124 128 128 3999 82471 1391557 852438 256 4 3468 5615 395076 402481 256 8 5950 10202 693718 725106 256 16 7834 17088 917096 567575 256 32 18148 48911 1112909 1084800 256 64 14527 51759 1543163 1361224 256 128 8744 55482 1455317 1649865 256 256 14364 75361 543445 1826695 512 4 8171 6018 182923 353564 512 8 11593 6077 909255 714207 512 16 12905 13044 127395 788992 512 32 9097 32047 1096322 1011625 512 64 9656 28900 1221684 1289156 512 128 8865 52384 1580419 345487 512 256 12348 41867 1580419 1574625 512 512 10812 31200 1667552 2256220 1024 4 3605 6897 629409 576288 1024 8 8076 11632 876022 411915 1024 16 9302 12899 922497 354932 1024 32 17007 36665 744128 939446 1024 64 29639 35698 1294520 766437 1024 128 24973 48149 1052480 660682 1024 256 24253 53316 1526390 1076755 1024 512 18628 31546 1356245 592915 2048 4 5536 3797 107903 178352 2048 8 4977 8627 253683 175223 2048 16 14052 18517 763902 530281 2048 32 11636 20527 969211 518596 2048 64 30696 56821 1485169 443974 2048 128 14121 32317 1532875 1337828 2048 256 40220 30480 300549 259539 2048 512 46532 33644 1593737 1596106 4096 4 5170 4515 177262 239701 4096 8 7083 8824 225899 765597 4096 16 24521 13312 301132 481096 4096 32 13542 34805 1278853 561162 4096 64 30695 31315 1045143 753476 4096 128 34625 52788 307922 408744 4096 256 28918 38718 1641680 826638 4096 512 32667 38251 1328086 752519 8192 4 6047 1798 523219 377721 8192 8 8743 8989 311328 271986 8192 16 12831 26614 200258 536973 8192 32 22183 31956 752532 749904 8192 64 33687 35667 1030561 580991 8192 128 30524 44118 1004529 829568 8192 256 42970 54627 945616 456378 8192 512 38905 54182 920856 788215 16384 4 5456 7798 806540 491419 16384 8 13457 10953 409110 263942 16384 16 21257 25497 430430 399191 16384 32 23075 20938 249958 271330 16384 64 28085 24349 383655 226435 16384 128 55386 32526 1007885 775170 16384 256 26423 29745 938857 471208 16384 512 30449 41491 652880 618727 32768 4 4076 6251 203530 481463 32768 8 10571 9146 405368 433117 32768 16 29758 29343 554740 469562 32768 32 20249 22222 937543 1001655 32768 64 27972 63824 1816610 1143420 32768 128 45289 40993 1412951 1122731 32768 256