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 Nov 6 23:39:28 2025 Auto Mode Machine = Linux oleg308-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-oleg308-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 3989 16516 249985 254971 64 8 4747 24288 407457 318124 64 16 4699 12232 592827 306151 64 32 6597 56289 889431 703068 64 64 7819 64391 1049372 1255511 128 4 7717 16949 278199 178551 128 8 12804 28175 673778 50754 128 16 10928 42981 464097 499970 128 32 11791 60121 718889 606767 128 64 8160 70438 927549 942199 128 128 10240 84217 1663139 1455701 256 4 10100 18422 265330 241953 256 8 7701 25676 478536 141527 256 16 9601 47958 638445 427478 256 32 11762 27078 780445 330401 256 64 11571 52652 1049800 973645 256 128 15648 99959 1362952 1075025 256 256 16266 121452 1752173 1147398 512 4 12118 12713 247925 257559 512 8 15637 12641 470546 136427 512 16 12978 29821 420020 559560 512 32 14328 69207 518740 660600 512 64 15507 47801 1066910 925717 512 128 18646 60428 515502 1108203 512 256 17183 68311 1555239 1410215 512 512 36168 110298 1446306 2246778 1024 4 12499 9213 202891 224517 1024 8 8556 16217 399687 343520 1024 16 15927 40053 496883 348538 1024 32 23604 33343 643652 159203 1024 64 18310 79539 1101046 1102176 1024 128 32078 98396 1281389 220505 1024 256 32415 108555 1363565 1009676 1024 512 41305 40437 1231070 1437980 2048 4 10841 9837 140494 71277 2048 8 19298 24396 373446 303094 2048 16 32628 42223 559393 574777 2048 32 40433 50520 904603 356668 2048 64 35401 47907 1262704 1102290 2048 128 28600 63717 1296240 1203273 2048 256 47481 52393 1297023 1027159 2048 512 54181 91571 1531781 1316907 4096 4 9300 10218 212380 183053 4096 8 17293 17699 296466 272286 4096 16 37023 43593 711122 355648 4096 32 45180 65033 680396 699454 4096 64 54475 56904 1203931 1091353 4096 128 43233 48183 1293781 210244 4096 256 67888 89828 1450903 736549 4096 512 64329 83255 1612103 1438632 8192 4 7070 9986 178806 242045 8192 8 16435 21792 195681 183225 8192 16 22747 31580 265878 113459 8192 32 34994 29717 438733 277365 8192 64 28381 43620 933668 856001 8192 128 42147 56991 1343131 562363 8192 256 43163 55541 522448 1066383 8192 512 36293 63595 1397998 474347 16384 4 7310 9141 137256 150719 16384 8 15096 16406 239847 260792 16384 16 21145 21383 469646 361916 16384 32 30615 42318 534903 583600 16384 64 40313 46570 818548 633173 16384 128 44292 62952 1126441 973959 16384 256 52260 51857 680567 461859 16384 512 56265 91024 1447585 903148 32768 4 10266 10138 186505 156658 32768 8 13574 16240 241035 182606 32768 16 21881 30303 561353 330419 32768 32 36806 54765 676240 714366 32768 64 39891 50378 539247 408746 32768 128 49795 44699 741055 883472 32768 256 50300 63751 841563 719828 32768 512 41560 47217 1023648 716365 65536 4 9235 11262 211349 209668 65536 8