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 Mar 4 21:45:13 2026 Auto Mode Machine = Linux oleg256-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-oleg256-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 10799 19974 125272 171545 64 8 12903 38392 405610 265565 64 16 20125 64701 718114 447537 64 32 16691 61598 666414 546928 64 64 20011 82372 1421755 1484662 128 4 12043 18623 211883 120731 128 8 16593 29097 305594 414314 128 16 23920 62588 352553 526444 128 32 28951 94323 1093856 533241 128 64 34668 108375 942199 1155043 128 128 21731 143325 1093856 1196221 256 4 16853 19193 138909 134878 256 8 22767 38300 329489 335984 256 16 40641 63792 344500 439013 256 32 50493 96674 664935 727070 256 64 49108 126862 1052888 1191979 256 128 28409 157352 1254656 1213534 256 256 29204 190894 1455317 1479379 512 4 16652 16209 213323 166229 512 8 30860 36898 218533 259364 512 16 24507 67627 363376 360872 512 32 46364 113546 774480 758344 512 64 61383 148657 1289930 851903 512 128 82009 151703 1174254 955368 512 256 67948 189844 1458090 1614885 512 512 88827 168763 1723770 2438090 1024 4 17242 18475 178334 208384 1024 8 27244 38570 354697 350329 1024 16 46090 54442 416267 464230 1024 32 51512 95763 579242 640007 1024 64 82868 124876 947320 649394 1024 128 93411 171409 1024854 1089317 1024 256 73053 115599 1584972 1131503 1024 512 86130 153733 1458489 1378002 2048 4 17044 17141 150389 154517 2048 8 28046 33033 278380 270082 2048 16 45296 53313 433073 411833 2048 32 66803 88639 781983 559539 2048 64 78726 103408 1127020 728281 2048 128 78102 135548 1379066 1035455 2048 256 84718 143476 1666393 1174964 2048 512 98841 188426 1744217 1350023 4096 4 16839 19553 169859 156874 4096 8 28745 34425 326502 289287 4096 16 42187 48640 492008 344722 4096 32 54745 78015 777095 322543 4096 64 66727 112666 1131832 1103196 4096 128 84535 104322 1388518 1138131 4096 256 93243 125937 1317494 1150555 4096 512 98018 156472 1654964 1326445 8192 4 16393 17678 163591 154262 8192 8 26856 32299 280346 257561 8192 16 46156 56490 550241 488725 8192 32 65758 88174 655998 692069 8192 64 76223 109687 949903 768849 8192 128 78236 121565 1246507 972459 8192 256 88005 152375 1549494 1255113 8192 512 87814 143264 1790147 1434955 16384 4 16773 18437 169097 153157 16384 8 29062 33922 292686 300716 16384 16 41494 55073 409139 499466 16384 32 62745 82694 772321 777740 16384 64 90320 109185 1020609 902258 16384 128 98922 147298 1354831 1212650 16384 256 103872 153125 1639347 1241324 16384 512 117041 187752 1963536 1888634 32768 4 17680 19159 170379 141954 32768 8 28172 32160 283168 312055 32768 16 47931 52610 457224 390648 32768 32