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 12 19:03:12 2025 Auto Mode Machine = Linux oleg210-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-oleg210-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 17144 21304 280847 284418 64 8 20013 35261 410573 365314 64 16 25257 57767 627470 763021 64 32 33043 77008 789967 821391 64 64 38854 125742 1310683 1232453 128 4 16066 24786 228961 275345 128 8 27862 38414 389091 363535 128 16 40936 59147 640042 584313 128 32 42441 81531 821147 853794 128 64 51282 105272 887675 962469 128 128 33040 124540 1281909 1185654 256 4 21340 28035 310706 275544 256 8 28085 48698 549564 720726 256 16 38260 61745 709299 582983 256 32 72955 90330 757326 833776 256 64 63475 126355 1052888 864661 256 128 63524 163162 1347557 1445521 256 256 82053 181565 2557711 2034350 512 4 18904 20969 271736 259238 512 8 30795 42202 402844 463338 512 16 50991 66467 1115688 841884 512 32 72194 134522 1514652 920558 512 64 95738 137563 1585086 1089094 512 128 113450 176794 1383861 1672748 512 256 101263 215853 1931527 1834193 512 512 127615 175637 2830083 2560168 1024 4 23679 26620 246627 334973 1024 8 39215 41062 661496 702273 1024 16 54756 74369 803127 749191 1024 32 90411 119014 1088213 1051449 1024 64 85468 173914 1408275 1129123 1024 128 115864 181660 1324460 1625154 1024 256 134210 265010 1542286 1851434 1024 512 154986 258704 2289665 2625597 2048 4 23596 22374 374129 328778 2048 8 35576 39708 499159 649728 2048 16 64102 69926 1153041 1035330 2048 32 73557 94360 984203 770480 2048 64 110835 143769 1089290 971953 2048 128 128248 189506 1748834 1460673 2048 256 140388 194453 2094183 2064488 2048 512 135665 264632 2107025 1586379 4096 4 23312 26296 393358 363696 4096 8 40861 45736 691793 637618 4096 16 55483 70986 881796 746340 4096 32 85064 95974 1419260 990833 4096 64 98095 148783 1421256 1392344 4096 128 109736 194880 1856719 1595632 4096 256 97960 183809 1903416 1360371 4096 512 133782 199959 2222261 1442740 8192 4 21448 24264 371365 375160 8192 8 37424 39556 481938 549757 8192 16 61541 68569 857968 946945 8192 32 85637 108080 1304281 948383 8192 64 101505 136460 1492681 1276421 8192 128 107856 156091 1661029 1352489 8192 256 102700 195363 1860621 1362140 8192 512 124411 191005 1967257 1891867 16384 4 21490 22159 300414 315928 16384 8 37237 40203 589903 525901 16384 16 52927 67832 897803 794033 16384 32 77337 100851 956179 1026831 16384 64 107579 144518 1352937 1053902 16384 128 120964 161125 1547568 1206836 16384 256 120990 185307 1562914 1549907 16384 512 112303 191390 1943324 1604852 32768 4 21069 24133 369541 343440 32768 8 34504 37955 506344 537171 32768 16 54317 64163 902998 800488 32768 32 76395 87276 1287945 1101257 32768 64 103326 138255 1424255 1161657 32768 128 110338 169545 1732107 1374722 32768 256 122363 165434 1858870 1410964 32768 512 143054 187035 2341227 2009817 65536 4 22014 25460 434116 352575 65536 8 38266 39612 531900 480300 65536 16 57328 68176 973295 847583 65536 32 82776 97002 1341412 938038 65536 64 101876 149358 1395958 1301555 65536 128 115342 157631