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 Aug 15 10:11:03 2026 Auto Mode Machine = Linux oleg614-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-oleg614-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 1659 9542 621657 106487 64 8 3619 11113 799377 236131 64 16 5110 18391 407457 712397 64 32 4202 24931 955947 681644 64 64 7217 74157 1105556 1553394 128 4 3568 12522 529038 558771 128 8 9225 8339 260641 727658 128 16 4616 36898 659704 757430 128 32 9975 66216 1196221 914904 128 64 8699 74505 558771 160797 128 128 9126 67874 1455701 1598754 256 4 6864 10117 506050 335041 256 8 8171 12627 632056 366739 256 16 16248 34769 1023775 576411 256 32 19219 42041 1015065 973645 256 64 16197 56498 603970 996229 256 128 14920 120702 980760 1306564 256 256 25658 112471 378637 977189 512 4 3530 6180 587738 304572 512 8 8200 13959 292939 622133 512 16 20685 27493 901241 806474 512 32 22682 50975 711133 420020 512 64 18708 35771 884536 563820 512 128 28257 60966 1434711 108383 512 256 12731 54184 1422357 1520013 512 512 20530 110224 1286838 1736314 1024 4 6069 10307 595051 248669 1024 8 12097 21296 555924 471001 1024 16 16832 27913 861093 293315 1024 32 22524 40485 1135391 264048 1024 64 32610 28735 1200447 934337 1024 128 38163 27718 1422266 839384 1024 256 17766 40964 1151834 308905 1024 512 17611 89800 296556 899129 2048 4 4726 6502 204163 259531 2048 8 8595 10690 220357 386623 2048 16 10068 22344 400224 648306 2048 32 22848 35270 1363523 902512 2048 64 22428 38379 733505 581469 2048 128 15452 40007 1007876 648306 2048 256 37288 40475 1511299 636206 2048 512 32579 51105 1077945 510855 4096 4 7481 7473 255695 286375 4096 8 11561 14280 471834 419924 4096 16 16509 17255 707665 721758 4096 32 22092 22758 869787 442805 4096 64 26234 39008 1081868 756129 4096 128 28069 37682 648521 1025798 4096 256 33669 55594 680746 336208 4096 512 36418 42181 573430 768474 8192 4 2141 6698 398522 395272 8192 8 11020 10708 353027 411534 8192 16 13958 13612 682163 735033 8192 32 19661 28433 823307 415119 8192 64 33281 36521 899238 380174 8192 128 23746 38035 747848 338316 8192 256 26647 41335 396650 818619 8192 512 31551 32962 1087477 699523 16384 4 4539 6229 269961 330236 16384 8 6601 10357 315757 249801 16384 16 15493 18965 512878 450620 16384 32 18302 19814 247422 211469 16384 64 26757 36599 608277 449838 16384 128 33149 43686 702388 738745 16384 256 33288 44052 1208173 732704 16384 512 37196 53835 1542877 926016 32768 4 5617 7975 223037 302452 32768 8 9839 11984 450382 353095 32768 16 16301 23116 433140 506585 32768 32