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 Jan 1 20:08:17 2026 Auto Mode Machine = Linux oleg235-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-oleg235-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 1988 8837 253048 41216 64 8 2174 28454 423529 383038 64 16 1576 21547 666414 576282 64 32 2060 58396 916769 378715 64 64 3016 49419 874936 1330167 128 4 5632 7950 275770 260136 128 8 5809 15943 428193 219596 128 16 7901 36654 646983 415597 128 32 6622 19563 492178 771581 128 64 8475 53597 561107 37120 128 128 7204 49061 1406136 1492113 256 4 3421 12864 258309 138532 256 8 7240 8000 343179 326583 256 16 6351 20804 609455 1112909 256 32 4050 34284 163784 817898 256 64 5450 42659 1506359 1066483 256 128 8024 46911 1306564 1280084 256 256 15251 81629 1479379 962301 512 4 9004 11905 316233 208984 512 8 12196 18035 220033 199602 512 16 12061 9272 267239 83837 512 32 18930 32565 243594 618193 512 64 15846 43955 1163439 1001715 512 128 9568 73901 506983 1034530 512 256 19141 70446 652967 1547395 512 512 15439 30272 1647088 1815584 1024 4 5645 4205 88245 99628 1024 8 13768 17714 84002 123387 1024 16 9929 20094 257294 268421 1024 32 21402 31955 404239 435162 1024 64 9712 20667 490920 744257 1024 128 25805 71398 1217806 501935 1024 256 25974 35201 947947 389502 1024 512 25758 52352 749714 1592612 2048 4 7275 4967 147497 78738 2048 8 7797 6895 242654 144359 2048 16 9363 17728 274932 301001 2048 32 31307 35876 920007 807263 2048 64 22806 55724 667759 743086 2048 128 20048 26671 1356418 1204116 2048 256 27733 45568 1172238 1310279 2048 512 48062 87401 807263 418209 4096 4 5210 9249 93294 225242 4096 8 12722 15172 95999 151664 4096 16 18905 22068 430208 290270 4096 32 29240 43508 716341 204586 4096 64 33383 30966 334943 302532 4096 128 25197 33703 333610 399496 4096 256 43314 40981 409885 1280760 4096 512 23104 50093 644024 647275 8192 4 5145 5073 142647 78300 8192 8 2294 7532 113994 207606 8192 16 9155 13745 211811 169102 8192 32 26682 29176 542800 654000 8192 64 20803 20301 796252 671799 8192 128 31137 58005 511840 279372 8192 256 30230 47224 918886 793732 8192 512 29783 42865 515603 665798 16384 4 5918 7158 103161 108235 16384 8 9260 8943 383951 242416 16384 16 13158 18589 351316 342804 16384 32 19525 27663 478338 471469 16384 64 28252 34209 838913 518990 16384 128 37583 41392 884434 600832 16384 256 37725 35529 925704 956565 16384 512 25415 42847 821003 367024 32768 4 5620 5896 102875 95918 32768 8 9975 7627 212150 120129 32768 16 10424 15034 306804 164004 32768 32 16087 30992