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 Jul 13 08:59:35 2026 Auto Mode Machine = Linux oleg258-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-oleg258-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 2077 7862 653436 551422 64 8 1895 15955 1421755 500060 64 16 5155 28933 901377 752329 64 32 5412 32260 1226821 1163036 64 64 4804 36197 1255511 1484662 128 4 4333 7163 731625 281260 128 8 5771 27886 360605 739689 128 16 6476 25462 384356 962469 128 32 3524 13433 1332828 992724 128 64 8523 22870 1377278 1243315 128 128 9849 73818 876086 1802755 256 4 3760 4148 635047 992545 256 8 6421 5696 356629 523315 256 16 6822 10479 1099237 988889 256 32 6827 31609 672010 641497 256 64 14828 37948 1413179 972763 256 128 12618 32540 1629830 886067 256 256 12919 65504 1549845 1924938 512 4 5878 8260 209739 293059 512 8 7316 15621 887094 603089 512 16 18306 24474 784094 853257 512 32 16335 47944 1160923 434994 512 64 24364 57691 1040545 1205228 512 128 22916 78501 1216149 894857 512 256 25762 80388 1640796 1772135 512 512 29732 77095 666546 2975154 1024 4 5976 5873 400171 599872 1024 8 9241 16353 558019 804933 1024 16 14214 20085 402685 480055 1024 32 22230 36397 539785 466701 1024 64 18802 28455 776834 653445 1024 128 22504 37622 1365299 620229 1024 256 35528 32592 1091809 1503942 1024 512 31526 64634 1040496 935151 2048 4 7622 4443 333605 250341 2048 8 11755 16079 345368 227778 2048 16 14343 11945 1072695 688361 2048 32 14961 21163 750421 289225 2048 64 22790 45777 1385740 899864 2048 128 25701 34559 586151 906607 2048 256 40923 100313 269405 1153041 2048 512 18285 53615 680616 1668983 4096 4 4647 5251 313651 117558 4096 8 7588 10879 896240 672591 4096 16 12403 15931 240107 494088 4096 32 13828 40593 1197970 414824 4096 64 20340 47842 889098 637003 4096 128 39062 73716 831841 512896 4096 256 40490 46561 964413 269755 4096 512 40648 58160 1553220 687145 8192 4 5185 5758 280923 210051 8192 8 7328 1960 249535 189035 8192 16 10629 9238 366990 313894 8192 32 11049 17361 551947 557355 8192 64 22198 19760 515967 285793 8192 128 29150 34548 532223 390337 8192 256 18325 29110 394283 388632 8192 512 20242 41631 1035655 187310 16384 4 4161 4260 191145 149288 16384 8 7087 7764 163762 235051 16384 16 9811 11843 484104 502994 16384 32 19563 23037 382401 233940 16384 64 20692 30477 445785 396601 16384 128 26865 26469 449579 350856 16384 256 22662 30896 369783 314980 16384 512 27243 35177 738857 863626 32768 4 4414 5196 309836 199785 32768 8