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: Thu Sep 10 08:15:19 2026 Auto Mode Machine = Linux oleg122-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-oleg122-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 1220 16477 139171 576282 64 8 3636 26281 855419 1255511 64 16 5947 53241 1013707 877797 64 32 2830 38786 916769 998622 64 64 3335 72632 1255511 1879725 128 4 1619 3978 667081 499970 128 8 5667 11102 870405 621518 128 16 3404 10578 942199 296973 128 32 6417 39505 1022989 1142750 128 64 6956 82636 1254941 1196221 128 128 3894 83122 196958 2098744 256 4 5245 8480 210504 284751 256 8 8781 12220 367870 636930 256 16 8255 24931 1766587 807442 256 32 5042 24849 876662 944525 256 64 8289 31726 731528 1103757 256 128 6383 97260 1455317 366239 256 256 8270 78068 1463250 2045979 512 4 3068 5833 445553 464641 512 8 7548 22643 564561 471476 512 16 12271 25810 625941 737762 512 32 18351 44845 1199171 1476130 512 64 8065 50127 1140576 1040545 512 128 17887 51628 1471074 554789 512 256 19890 31531 744153 1021732 512 512 23516 74279 1867692 2169601 1024 4 3527 4356 634805 513825 1024 8 9737 12491 975285 752868 1024 16 15076 21363 1051192 1202127 1024 32 22901 19525 952573 529210 1024 64 21304 36407 1329791 225152 1024 128 24864 35637 420012 782781 1024 256 27528 77381 1475525 533019 1024 512 23505 50216 1244266 1068983 2048 4 7176 7029 596738 195120 2048 8 9417 8668 239896 133691 2048 16 11140 13128 611348 983189 2048 32 15237 23887 714113 396895 2048 64 27664 54002 837241 451702 2048 128 19610 35069 659151 275161 2048 256 20570 26792 1576769 1345582 2048 512 20907 52127 601628 705665 4096 4 4745 4646 251164 146757 4096 8 7751 14043 404348 381022 4096 16 9721 12214 401485 443388 4096 32 21775 22467 322876 201874 4096 64 21575 26426 645646 429434 4096 128 34726 42735 769507 886162 4096 256 36837 59978 1555048 848732 4096 512 46468 73077 295035 826121 8192 4 1865 10043 315987 317027 8192 8 13148 11578 312194 381233 8192 16 13485 29084 653738 292518 8192 32 12237 32738 490714 554790 8192 64 33814 18394 140826 477996 8192 128 26096 34880 460921 312970 8192 256 25749 37166 707867 419497 8192 512 41748 56726 816673 434840 16384 4 4719 6141 314508 210453 16384 8 10900 9319 366557 501716 16384 16 16998 26563 300364 199553 16384 32 18889 29117 595134 639049 16384 64 24962 34187 440538 451348 16384 128 22273 28138 939242 441163 16384 256 26297 33172 617149 386871 16384 512 35707 50291 1112959 835405 32768 4 5616 4988 244069 183834 32768 8 8893 16758 655348 556512 32768 16 20210 9984 445132 272374 32768 32