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: Wed Aug 26 18:06:34 2026 Auto Mode Machine = Linux oleg431-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-oleg431-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 2399 6430 571375 459802 64 8 1715 14066 901377 718114 64 16 3929 18354 1143223 886494 64 32 2858 34935 1101022 1226821 64 64 3040 33334 1518251 725882 128 4 1930 4793 378663 397444 128 8 4165 12968 538051 447464 128 16 2416 6721 1065630 969421 128 32 2053 57710 1142750 976473 128 64 5118 24657 1065630 1102844 128 128 2680 61981 271722 1373754 256 4 3594 4273 641880 516270 256 8 2937 20238 969251 833776 256 16 5085 17094 1084800 742146 256 32 8893 10925 343179 238407 256 64 7335 23275 822913 83011 256 128 10070 13524 1066483 1137672 256 256 9799 24336 1683493 508929 512 4 6568 6683 54105 260433 512 8 3488 5253 374530 122490 512 16 10958 9926 473660 283353 512 32 10387 24375 1442420 1227269 512 64 16260 31513 1322500 782951 512 128 20976 49267 1711407 781811 512 256 16720 31667 634448 746222 512 512 12915 82314 1772135 1357615 1024 4 6372 7321 94378 341227 1024 8 4909 6053 413064 316136 1024 16 18573 9880 997251 222851 1024 32 13860 11273 813933 1062372 1024 64 9204 22157 483242 104062 1024 128 16293 57879 370230 1284839 1024 256 11329 19586 1238168 448710 1024 512 9421 32186 402836 362083 2048 4 2809 3775 282370 254850 2048 8 6801 6842 211946 175811 2048 16 7096 22244 297200 790183 2048 32 34466 26869 156135 433532 2048 64 18947 38908 1261036 428280 2048 128 16068 28420 1394287 89234 2048 256 43771 75893 979043 321807 2048 512 50086 25514 401890 1543340 4096 4 9550 3354 404471 370504 4096 8 18561 22942 488025 567389 4096 16 9754 22437 704156 569043 4096 32 17082 22992 352315 626024 4096 64 1617 23711 964413 761491 4096 128 25598 34314 705486 683917 4096 256 28463 42966 934511 660540 4096 512 48896 79612 949279 672143 8192 4 5666 5812 209504 386052 8192 8 8183 10516 216520 241224 8192 16 12475 13640 390075 303700 8192 32 18059 26291 424169 309564 8192 64 20819 36341 672417 459448 8192 128 31698 35419 838230 547235 8192 256 29714 35915 897852 644287 8192 512 34870 45547 360165 277421 16384 4 4873 7636 254500 228954 16384 8 11269 14004 228546 359338 16384 16 21507 22955 506255 495901 16384 32 13985 36055 807449 426434 16384 64 21526 33811 765533 684860 16384 128 27501 45231 706272 221067 16384 256 25268 32254 736457 606297 16384 512 38875 42976 752868 627020 32768 4 5729 5697 170800 160305 32768 8 10331 8563 552823 279741 32768 16 17471 14184 341425 558275 32768 32