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: Fri Jul 3 05:45:30 2026 Auto Mode Machine = Linux oleg459-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-oleg459-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 2237 6740 524487 516414 64 8 2710 11738 666414 555990 64 16 1996 35773 926260 886494 64 32 1899 42408 1304314 1083249 64 64 2892 25276 1105556 1452528 128 4 3683 8412 207061 508012 128 8 4753 16408 663782 794416 128 16 8312 19285 947186 831319 128 32 7406 10449 2166499 1121270 128 64 5680 20762 1377278 1196221 128 128 3981 94042 1377278 1939522 256 4 4214 4414 608074 455592 256 8 12589 26555 491233 826078 256 16 6660 9429 1147398 723153 256 32 11147 37382 1267990 1117543 256 64 22432 52870 1413179 232522 256 128 8248 67868 1600674 1619994 256 256 18497 78359 822913 1817419 512 4 3114 5605 479798 241295 512 8 8325 11202 408592 719954 512 16 20075 28847 1000315 1028091 512 32 12006 35376 1236455 102938 512 64 12226 51168 866338 133121 512 128 18527 36412 1629590 1422357 512 256 9267 42356 1730717 1740536 512 512 21267 11279 259614 2235086 1024 4 6769 3108 660987 455902 1024 8 6845 11385 520614 242149 1024 16 21725 40639 693765 164025 1024 32 8639 19057 520362 343850 1024 64 13804 47756 975285 840698 1024 128 21430 36602 1383774 314677 1024 256 23823 113967 1114185 1577984 1024 512 13618 42022 576598 2306882 2048 4 8630 7226 311096 388547 2048 8 11561 8163 1047577 432615 2048 16 9407 26840 1070556 463124 2048 32 15535 51364 684958 565618 2048 64 18391 11521 911417 510855 2048 128 56356 61875 1712231 976150 2048 256 32487 37752 840107 772003 2048 512 39398 43879 1523630 218518 4096 4 4065 3134 142812 138238 4096 8 5555 8395 299500 557646 4096 16 28576 22355 792582 770508 4096 32 21253 15038 870183 248634 4096 64 34651 84535 1463884 1200482 4096 128 33239 65736 1578334 647397 4096 256 35911 46583 705225 934104 4096 512 55334 71522 969255 1860943 8192 4 5895 1608 218902 125184 8192 8 5722 10698 474242 445849 8192 16 7981 14275 301520 179064 8192 32 11953 16824 668896 1025027 8192 64 35553 32344 1012969 1447895 8192 128 50051 71064 556560 462173 8192 256 32696 48922 742900 671537 8192 512 30039 29717 236653 221423 16384 4 4702 3772 133924 203588 16384 8 6837 10300 619318 367081 16384 16 10341 17126 321797 371434 16384 32 14832 28243 772069 925966 16384 64 22520 29035 526562 595392 16384 128 36702 36019 774724 888941 16384 256 23597 39500 1081654 861634 16384 512 24459 31500 686351 872320 32768 4 4024 4500 589427 279485 32768 8 14317 10229 294221 366671 32768 16