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: Thu Aug 6 04:00:11 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 4 638 4411 608965 645579 64 8 3838 16088 704914 769584 64 16 3802 40024 400168 614542 64 32 5087 30812 1357066 780776 64 64 4315 26911 1105556 1638743 128 4 969 2208 320940 659704 128 8 1073 3030 876086 780556 128 16 1822 5293 1051027 458548 128 32 2288 7552 1231904 876086 128 64 2534 3493 992724 1152564 128 128 3098 94323 1133103 1603529 256 4 1949 1767 77132 98955 256 8 2234 8054 962301 815414 256 16 3218 7111 1011241 930608 256 32 1371 13989 1293967 1230218 256 64 6179 43280 1195962 1219045 256 128 6504 31597 562520 1740810 256 256 9634 35718 1707589 996229 512 4 3430 2589 201267 401563 512 8 4827 4870 634448 529483 512 16 3808 8299 283990 593259 512 32 4120 5958 1411141 1179413 512 64 15786 30902 1674052 318013 512 128 6996 87685 1480200 895230 512 256 16431 69078 1674052 1406520 512 512 15726 30043 165155 2216629 1024 4 2497 2571 161898 57742 1024 8 5176 4076 835303 119014 1024 16 12080 38581 1133893 969561 1024 32 5782 9406 260493 774034 1024 64 9133 11967 1014925 302062 1024 128 9994 27236 1333507 1512415 1024 256 9847 25610 1729188 240038 1024 512 10490 11830 1709912 418824 2048 4 1004 1332 76085 114024 2048 8 2418 5577 909391 544673 2048 16 10682 8966 303276 271294 2048 32 7569 14141 1127020 1137768 2048 64 8740 11746 1320349 147285 2048 128 11509 19583 1530689 547136 2048 256 15648 27696 924562 580801 2048 512 18126 34742 1791882 1682715 4096 4 3019 3941 139737 89305 4096 8 7891 11094 500304 670491 4096 16 10933 13145 330059 489192 4096 32 11762 14394 363150 511552 4096 64 22800 27820 1612557 748258 4096 128 21485 32136 462934 433574 4096 256 22678 35675 592004 1467511 4096 512 50256 40937 700167 1579060 8192 4 4207 3275 194631 174423 8192 8 3972 5724 171621 167996 8192 16 8260 7539 407826 374183 8192 32 8801 9583 325725 167166 8192 64 17203 29593 827052 360820 8192 128 23495 40977 452424 794485 8192 256 32301 36791 631324 450555 8192 512 25561 39814 878208 679330 16384 4 3239 2445 121122 108515 16384 8 6970 7879 641801 696953 16384 16 22629 27933 842400 683063 16384 32 33556 36521 725694 395642 16384 64 18234 49998 627862 249984 16384 128 28828 29771 399453 385952 16384 256