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: Mon Jun 1 11:24:16 2026 Auto Mode Machine = Linux oleg245-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-oleg245-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 3383 15740 552557 592827 64 8 7367 19144 313664 1163036 64 16 5465 31359 952555 603489 64 32 5106 61177 1143223 778512 64 64 4939 33702 1204796 1828508 128 4 5682 5968 631014 617941 128 8 5591 17797 445978 475609 128 16 7517 30139 522346 1155043 128 32 7801 31801 1024942 1240443 128 64 19568 137772 1406136 1377278 128 128 12845 63304 1561553 2132084 256 4 8577 5933 901693 561343 256 8 5877 12886 576720 433869 256 16 16313 11035 987979 807442 256 32 16063 31987 1286217 1028679 256 64 10361 34618 609801 131283 256 128 19644 23400 1447470 1495866 256 256 16818 50842 672010 1504249 512 4 7708 9704 475337 516618 512 8 12547 17767 348063 522908 512 16 6867 19680 1014013 671759 512 32 23545 49617 1190529 1667552 512 64 31191 101244 1336492 770866 512 128 10467 75493 1422357 1207940 512 256 23238 106888 1541840 1542947 512 512 25351 115968 1700565 2198475 1024 4 11351 10797 338618 222125 1024 8 11898 26932 605197 216035 1024 16 17271 19296 1000969 467565 1024 32 13301 72918 1217461 1570483 1024 64 25422 93566 1486247 975285 1024 128 42187 53685 1492445 1042770 1024 256 52427 118698 1753902 2188177 1024 512 41835 147422 1841906 1296083 2048 4 7382 10651 713105 363890 2048 8 14563 12998 861594 1015382 2048 16 13347 24693 561404 671256 2048 32 26765 30844 938605 648943 2048 64 26539 48787 1523630 268269 2048 128 69077 68771 1130878 1392253 2048 256 39117 52582 1115459 1502575 2048 512 43585 94165 512134 794716 4096 4 13173 12037 665349 517235 4096 8 15654 19345 891589 459812 4096 16 19745 37373 1050255 626481 4096 32 30670 56868 1334171 1363069 4096 64 27651 44416 1890015 703637 4096 128 43749 62382 1399376 661838 4096 256 56615 68568 880485 692128 4096 512 51542 93473 1901520 1398806 8192 4 9267 11478 689099 432112 8192 8 16749 18134 555535 437047 8192 16 25737 35810 968321 701608 8192 32 40626 44535 1360145 1323421 8192 64 38173 58067 688464 1547749 8192 128 74814 67606 542013 703231 8192 256 51028 71862 1307756 1592217 8192 512 74845 100950 1077316 1386098 16384 4 8405 9793 158998 377190 16384 8 16197 20958 299465 359850 16384 16 31347 33346 739151 439332 16384 32 58579 45454 1405283 1346600 16384 64 48509 57632 1309146 516242 16384 128 56110 73929 1586842 858834 16384 256 53709 91600 1155827 1583295 16384 512 62574 118139 1041649 1551201 32768 4 12429 11759 757081 735881 32768 8 20296 19916 719117 471421 32768 16 33982 33905 887683 1027759 32768 32 43718 56332 1117827 1034536 32768 64 51250 82658 1259200 925098 32768 128 63346 74729 1862876 1249822 32768 256 69948 96617 2116796 1534382 32768 512 60599 82718 1619046 1307065 65536 4 10501 12956 389805 528737 65536 8 17960 17138 828762 602185 65536 16 24211 32138 823513 831527 65536 32