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 Jun 1 13:20:30 2026 Auto Mode Machine = Linux oleg257-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-oleg257-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 3531 8855 576282 519412 64 8 5621 12926 397796 688639 64 16 2640 44980 1124074 484710 64 32 4068 62633 1304314 998622 64 64 7181 29534 1357066 1279447 128 4 6826 11172 464097 549056 128 8 8129 22695 819893 677178 128 16 11587 19361 1111981 354415 128 32 9705 74858 1152564 1000121 128 64 16000 45195 1294270 1346196 128 128 6479 102148 291649 1939522 256 4 7994 11273 271777 354627 256 8 7940 14714 385571 391475 256 16 10558 47593 1201314 573946 256 32 11366 81142 1487577 977189 256 64 13742 73019 470566 1147398 256 128 10569 160097 1729594 338633 256 256 33156 43432 1652404 1704877 512 4 6250 7717 525596 462440 512 8 4356 18559 494606 507342 512 16 13369 27089 1479181 126547 512 32 7491 24055 1336492 681782 512 64 14351 70069 1434711 462042 512 128 17990 42174 1077618 1150968 512 256 33512 78059 1560891 1438555 512 512 34087 171226 1270846 1684557 1024 4 4843 5695 137987 210828 1024 8 6578 5921 866304 779938 1024 16 20526 31757 406343 122577 1024 32 15817 28426 1226500 913471 1024 64 38190 25635 1161176 378684 1024 128 37730 70151 705271 973516 1024 256 39565 95853 718605 1003073 1024 512 55739 109787 1664841 1271902 2048 4 9624 10448 639188 361456 2048 8 14357 19263 940352 621342 2048 16 22298 27091 1543340 835531 2048 32 38332 37308 857980 343517 2048 64 29419 49579 978485 712337 2048 128 32074 51543 1635926 773463 2048 256 28867 101316 952130 1394061 2048 512 29155 89557 1777789 568914 4096 4 5097 7224 389276 330402 4096 8 12706 8567 210840 188512 4096 16 20060 28865 232004 461888 4096 32 25972 34070 1157064 113771 4096 64 42499 43575 1174306 500727 4096 128 31267 52605 582965 578859 4096 256 29628 45284 1711005 599524 4096 512 33491 44705 938185 742855 8192 4 5038 1666 311554 226549 8192 8 12121 12399 354630 380191 8192 16 13113 12675 680797 450975 8192 32 27375 23438 948043 435839 8192 64 29262 29927 882380 744445 8192 128 37339 41690 1055118 459398 8192 256 28475 46583 1239358 1073245 8192 512 27762 47301 1413643 1030437 16384 4 4850 4137 214127 139895 16384 8 7441 11283 725273 344643 16384 16 13447 16978 654572 205099 16384 32 23021 18304 862542 565984 16384 64 21980 29415 791764 731721 16384 128 31702 49516 988061 547994 16384 256 30690 43965 1321838 842544 16384 512 36583 36697 856234 1051193 32768 4 4875 4318 156373 214596 32768 8 6621 7881 539870 355794 32768 16