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 Jun 27 21:14:30 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 1956 3323 627470 185536 64 8 2371 9212 69872 467002 64 16 3129 4213 70868 735831 64 32 4002 28569 901377 789967 64 64 1951 53199 821391 1330167 128 4 1457 2633 254464 462100 128 8 2168 22853 901083 621518 128 16 4003 12774 969421 282592 128 32 7342 38800 1319723 57445 128 64 4215 39543 1346196 1455701 128 128 7121 40546 1539168 1598754 256 4 5391 10483 512084 661657 256 8 7967 8448 422432 285053 256 16 8100 30364 1117543 941213 256 32 3227 32084 1213534 1019886 256 64 12918 40680 1339154 1231629 256 128 10660 45912 1354356 1422540 256 256 6358 129556 1495866 1985448 512 4 3749 3531 580431 554074 512 8 7206 17167 791318 706221 512 16 4830 12671 1103647 893740 512 32 12807 14471 1354190 1024169 512 64 23788 17197 502005 1174254 512 128 26854 68276 1410215 2039772 512 256 16007 56642 1496706 510964 512 512 22507 34646 1479181 1835760 1024 4 5299 8849 202814 488519 1024 8 7107 10778 548190 446564 1024 16 16084 24178 821247 527002 1024 32 23883 33334 569563 737231 1024 64 19868 35664 1340164 573365 1024 128 27493 62561 812086 968031 1024 256 27484 53923 456726 359297 1024 512 33518 56301 1659053 1041758 2048 4 6335 4570 304135 198158 2048 8 6646 8799 515732 282528 2048 16 11556 18561 478393 917649 2048 32 33226 33984 875915 871826 2048 64 16944 27406 1376414 1202599 2048 128 23547 40567 1159578 767382 2048 256 21679 30318 1548069 225127 2048 512 31726 28101 1658350 1998214 4096 4 6046 4621 194353 169250 4096 8 8820 7659 368581 362989 4096 16 25058 17075 184680 372464 4096 32 19194 38690 473251 1318809 4096 64 29484 32379 302085 519864 4096 128 16446 41237 611714 847517 4096 256 22669 29185 355891 566921 4096 512 32284 34984 782724 713218 8192 4 2195 5129 398286 267772 8192 8 8063 9419 221082 200877 8192 16 15170 16024 412383 537780 8192 32 13981 18560 553102 444057 8192 64 23735 25033 604171 444562 8192 128 24283 34370 743302 680231 8192 256 32541 39592 827211 641748 8192 512 31666 49599 687018 736356 16384 4 3714 4511 190332 172399 16384 8 6878 8271 234170 270595 16384 16 8894 16837 1003177 759786 16384 32 14981 15196 280092 482208 16384 64 18177 21927 352072 273216 16384 128 16286 19423 432579 619223 16384 256 20523 46866 964445 730119 16384 512 35469 29116 397188 800042 32768 4 3800 4740 244761 224564 32768 8