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: Sat Sep 5 12:24:41 2026 Auto Mode Machine = Linux oleg129-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-oleg129-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 1576 12146 598110 537079 64 8 5040 10876 874936 831569 64 16 4520 22168 1210227 913649 64 32 2353 57917 1204796 855419 64 64 3346 57250 571375 1679761 128 4 8005 11011 640042 637004 128 8 6443 16601 780556 236215 128 16 6740 29725 1057236 706589 128 32 5683 22543 1346196 896569 128 64 13809 45036 1487977 1024942 128 128 15249 116690 1637771 1911894 256 4 9093 18305 894929 910872 256 8 9349 14501 1292410 271160 256 16 26114 52598 1143731 1093639 256 32 26635 64516 1093639 138819 256 64 18404 94297 894929 1158540 256 128 8435 46151 1415041 1262029 256 256 36897 112577 1471270 2223962 512 4 5857 13422 552221 283503 512 8 4994 11598 515626 530661 512 16 29791 12355 1049187 350220 512 32 17401 41273 178335 896725 512 64 44762 109376 1216149 710192 512 128 22694 193644 1245780 1652157 512 256 29992 225272 599386 1910902 512 512 51061 78891 285387 3163620 1024 4 8101 16639 964986 256894 1024 8 34159 32913 933322 904621 1024 16 39224 48639 1131503 328516 1024 32 15160 46153 1499217 410263 1024 64 57977 87618 556861 869284 1024 128 30677 47597 1488307 482320 1024 256 29841 60624 420876 1434138 1024 512 48579 83373 447587 449932 2048 4 4722 4991 165762 437708 2048 8 7110 10711 109123 281519 2048 16 10638 22624 937683 1009297 2048 32 24827 19305 365392 1148570 2048 64 29523 50152 1451295 1227869 2048 128 25606 43664 1555075 340710 2048 256 19069 33534 1734007 566028 2048 512 13455 90828 697982 237449 4096 4 10356 10380 380213 224512 4096 8 15466 16228 541784 409768 4096 16 40195 27572 948597 756295 4096 32 50959 41040 1388069 944425 4096 64 33691 45592 1490039 631408 4096 128 15474 31991 907029 814450 4096 256 30650 40796 349697 1447358 4096 512 32280 56001 839360 626686 8192 4 2361 6213 156637 200073 8192 8 10153 11663 516518 432476 8192 16 15488 16559 708334 515603 8192 32 22156 24327 696178 538488 8192 64 29105 27995 329249 330122 8192 128 25047 41071 551203 663113 8192 256 27844 40689 821417 838475 8192 512 29469 72579 451894 525596 16384 4 5939 6312 200044 243689 16384 8 12182 11727 480694 205521 16384 16 15715 21534 414018 263595 16384 32 18672 24477 772755 440823 16384 64 26706 45012 514091 569087 16384 128 31967 46788 1145099 850501 16384 256 38385 44050 971137 988900 16384 512 35003 56465 1097688 859511 32768 4 6686 6702 278123 207669 32768 8 10290 12038 478609 318442 32768 16 15161 15002 277610 317873 32768 32 20202 28503 866325 358504 32768 64