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 Nov 25 16:38:10 2025 Auto Mode Machine = Linux oleg119-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-oleg119-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 8144 23469 226948 176392 64 8 11942 32404 385237 185025 64 16 10223 47868 653436 292475 64 32 12211 84312 686877 829001 64 64 14137 61528 1279447 1357066 128 4 11185 22346 253862 213653 128 8 15355 34659 551878 258011 128 16 15458 42327 695603 544601 128 32 18887 97104 687585 501839 128 64 14975 104149 1093856 927549 128 128 16784 132928 1391557 1727352 256 4 16369 18950 327379 230228 256 8 20216 35794 532133 407522 256 16 26545 56436 644965 823544 256 32 29750 90781 937924 585845 256 64 19889 64420 1084800 808050 256 128 51292 132645 1552085 1098113 256 256 39905 149988 1588832 1312954 512 4 15127 19589 261894 297525 512 8 20370 36117 407275 440256 512 16 36358 62409 572081 628138 512 32 44387 95131 866338 966113 512 64 41434 122114 1164070 1017858 512 128 59974 151746 1323315 975328 512 256 49941 194012 1450212 1736314 512 512 65215 193278 1640796 2722449 1024 4 17976 20390 271475 212319 1024 8 27771 36559 479841 429548 1024 16 40348 52928 728849 550509 1024 32 59197 86289 1055843 813316 1024 64 54941 115509 1289467 1216426 1024 128 73637 109798 1380217 989212 1024 256 61461 151014 1718120 1374474 1024 512 69930 184208 1617808 1700434 2048 4 17065 21469 231149 245919 2048 8 29199 33744 522826 364616 2048 16 38621 51851 547136 580330 2048 32 55519 88305 926257 932694 2048 64 65939 111931 969649 975706 2048 128 72437 120499 1383731 1472440 2048 256 76348 135270 1585208 1276781 2048 512 82414 154776 1788524 1522550 4096 4 18146 19819 274054 277749 4096 8 29830 33596 439396 486119 4096 16 46663 59396 669837 603335 4096 32 59964 84460 1015610 880666 4096 64 86037 111973 1110039 932988 4096 128 91406 136103 1412492 1417386 4096 256 87667 137293 1575440 1292126 4096 512 100518 157309 1822835 1473932 8192 4 18415 20325 284061 274805 8192 8 30177 35124 488461 445311 8192 16 45220 56620 761758 677015 8192 32 64850 87630 973976 935167 8192 64 84524 110822 1293966 1142399 8192 128 91585 142655 1612012 1135078 8192 256 100206 132197 1620604 1451995 8192 512 113664 137614 1669747 1635414 16384 4 18913 19709 278553 247204 16384 8 30515 34793 487618 526223 16384 16 49498 60119 778780 784596 16384 32 65555 80250 1076469 927115 16384 64 77653 93483 974263 723097 16384 128 84388 108675 1424214 1340323 16384 256 98562 161385 1800267 1299811 16384 512 110072 155185 1866879 1524666 32768 4 19162 20835 316510 308590 32768 8 33980 36077 517727 470108 32768 16