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: Tue Aug 18 14:05:15 2026 Auto Mode Machine = Linux oleg139-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-oleg139-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 3517 7983 380864 581273 64 8 6320 16096 640954 488236 64 16 6941 32621 942521 844652 64 32 1899 50036 338589 998622 64 64 4491 41184 1638743 451299 128 4 4334 8664 821147 223342 128 8 3830 4738 600657 604036 128 16 11648 47528 776042 870405 128 32 9895 45552 731625 1093856 128 64 13742 25984 1076312 1346196 128 128 8077 62377 1579934 731625 256 4 6567 4463 332036 320060 256 8 14815 20913 794889 755195 256 16 6576 16973 873809 284449 256 32 13114 39481 1286217 591330 256 64 15707 88244 1312954 842278 256 128 13599 45189 537729 197096 256 256 15717 56953 1662639 2480886 512 4 5357 6933 286989 233350 512 8 14455 17740 482060 321826 512 16 5822 11511 164686 438279 512 32 24627 53776 359543 498047 512 64 15629 68293 314336 727268 512 128 33706 49140 242905 1087440 512 256 34015 101426 907717 290915 512 512 44332 111913 508905 643960 1024 4 9024 5800 572677 171040 1024 8 12749 20356 800582 249217 1024 16 24190 18175 439841 466499 1024 32 22206 27523 555277 240590 1024 64 27631 53601 880331 1090700 1024 128 38101 56332 634429 599537 1024 256 45896 52072 392923 973296 1024 512 42719 60854 1042770 1556257 2048 4 3513 8200 277320 138545 2048 8 11652 7508 543363 464828 2048 16 10210 16550 298761 871118 2048 32 20855 40993 733567 502723 2048 64 25653 29940 595869 1065510 2048 128 29573 43959 1265868 1269797 2048 256 22682 57952 737979 1149185 2048 512 26077 26742 897514 641575 4096 4 4744 7203 339638 474073 4096 8 7022 7531 514124 470310 4096 16 16774 23401 388098 615285 4096 32 23391 27348 385468 395823 4096 64 21491 35028 767307 561786 4096 128 21597 37479 980820 796884 4096 256 27685 30947 1890222 1532301 4096 512 38688 38549 995138 335381 8192 4 5311 5458 378328 330481 8192 8 9835 12476 397595 385415 8192 16 17014 19095 567706 264072 8192 32 15334 20004 474295 260417 8192 64 23292 30208 870752 522051 8192 128 25833 46545 854681 938821 8192 256 27022 42507 776266 476135 8192 512 34412 58721 847597 849252 16384 4 6442 6806 150898 173885 16384 8 9828 10616 186474 407712 16384 16 12613 20438 651815 562137 16384 32 24075 42222 1309146 994409 16384 64 24656 40590 467925 602349 16384 128 34986 39127 411689 489993 16384 256 29489 51346 677300 904694 16384 512 40669 50237 1062374 763390 32768 4 6402 6876 422305 199845 32768 8 9938 11469 541217 267058 32768 16 15088 18588 369263 445380 32768 32