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 Jul 16 13:50:25 2025 Auto Mode Machine = Linux oleg135-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-oleg135-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 3898 15670 252098 216165 64 8 4537 28685 429630 473593 64 16 4971 44232 533875 507625 64 32 5291 79517 769584 735831 64 64 6024 66332 1101022 1392258 128 4 8217 16052 75521 249962 128 8 9533 15037 401307 531131 128 16 12024 14244 561694 643108 128 32 8326 59613 955616 799146 128 64 11105 78092 824932 962469 128 128 14834 91431 1030846 1778862 256 4 9405 17650 211916 253731 256 8 14010 29280 441359 170548 256 16 13894 46250 596587 588414 256 32 12741 58890 882426 150240 256 64 25293 81062 366239 847597 256 128 13262 98727 1152323 1180188 256 256 16063 111305 1506359 1956506 512 4 10034 16165 224871 280687 512 8 18190 24648 402844 345043 512 16 27595 31409 639169 616772 512 32 27183 68293 1066380 386390 512 64 30228 74493 999850 807687 512 128 39433 105611 1150968 1166599 512 256 31585 87073 1094088 1484293 512 512 37055 129227 1533034 1889050 1024 4 12740 16347 197535 243398 1024 8 19985 31375 475169 275639 1024 16 26686 45938 439841 679496 1024 32 27792 52936 925080 587482 1024 64 35974 59269 1022902 1013967 1024 128 31039 153431 1356245 1128826 1024 256 42727 127459 1861867 1261072 1024 512 37478 131740 1729884 1654579 2048 4 14594 16054 246625 102862 2048 8 17045 26882 405801 466190 2048 16 33312 43000 641432 554984 2048 32 43404 66161 916376 952552 2048 64 47771 49582 1060642 954351 2048 128 46827 84352 1376414 1010841 2048 256 67818 108034 1188621 1082427 2048 512 44100 124886 1647536 1593737 4096 4 15915 15934 265556 185466 4096 8 22499 22330 484215 380600 4096 16 37357 45664 465190 428000 4096 32 36725 66343 867065 637500 4096 64 51618 80655 658641 650486 4096 128 52719 91459 533473 740677 4096 256 54612 104719 1577175 1242684 4096 512 45809 105820 1700336 373997 8192 4 12284 10045 201337 193208 8192 8 17291 24057 414153 309004 8192 16 25628 36854 357761 459657 8192 32 28868 58493 860331 637710 8192 64 47940 55305 725795 800631 8192 128 48227 86563 1190367 975912 8192 256 51652 75484 1674548 1422480 8192 512 54804 79068 726056 1168944 16384 4 11882 16369 265383 251161 16384 8 26678 28815 511150 452447 16384 16 39469 44240 482818 628172 16384 32 6649 52990 599553 870750 16384 64 50527 67960 1161747 1024122 16384 128 66353 80710 1314279 1274310 16384 256 55182 84374 804396 847909 16384 512 59023 85577 1002987 1185967 32768 4 13984 15986 216343 216962 32768 8 21305 25047 347188 337022 32768 16 31093 35811 594830 411943 32768 32 38847 54343 704898 503279 32768 64 49279 48728 986124 1084820 32768 128 50558 64198 669732 1103636 32768 256 52832 65795 1077996 612236 32768 512 62404 96325 550040 1097388 65536 4 11369 13300 183097 158930 65536 8 19733 21331 384973 352064 65536 16 30138 35951 396649 538964 65536 32 40536 56935 858138 477664 65536 64 54812 64659 902713 1021570 65536 128 59790 86082 911677 1104265 65536 256 64518 78843 1102781 594889 65536 512