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 Dec 3 01:57:54 2025 Auto Mode Machine = Linux oleg260-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-oleg260-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 10684 22575 273688 248136 64 8 12460 35916 388021 809014 64 16 17260 54517 688639 1101022 64 32 14525 77676 1204796 1553394 64 64 18130 135041 1105556 2067979 128 4 12720 21045 535903 261785 128 8 16964 29581 711270 600657 128 16 24869 60582 774922 537512 128 32 25287 80759 1749872 1155043 128 64 29540 119203 1778862 1359835 128 128 24744 134864 1206978 1858934 256 4 15933 19000 359495 268314 256 8 23501 37258 592636 695516 256 16 22122 71010 1019886 581719 256 32 42134 101952 913973 1003679 256 64 33529 104026 1292410 1036624 256 128 29284 109915 1897721 1897721 256 256 44298 161009 2170027 2325094 512 4 20244 24659 454320 389685 512 8 30674 30407 444815 583744 512 16 38511 55906 937845 988801 512 32 51833 95716 1132755 909640 512 64 57722 114162 1004057 1383861 512 128 56593 125614 1336492 1273106 512 256 49603 189208 2235086 1410215 512 512 68319 123668 2370799 2991733 1024 4 18959 23817 329272 254474 1024 8 33216 44103 473441 661904 1024 16 45484 50770 779371 607766 1024 32 52091 78576 943781 847667 1024 64 75593 149902 1615374 1317957 1024 128 65616 132508 1732676 1753186 1024 256 80025 174232 1469467 1695735 1024 512 68641 195307 1727102 1695735 2048 4 19631 19835 359549 330486 2048 8 30239 40617 436218 514835 2048 16 49708 62793 934317 810156 2048 32 65460 97844 1435290 1276781 2048 64 88769 116541 1517976 1297807 2048 128 78458 131891 2017929 1576480 2048 256 92984 133656 2081497 1988040 2048 512 102646 167240 1903457 2178635 4096 4 19841 22121 414034 371618 4096 8 33718 37500 572379 711004 4096 16 53587 51259 988382 800933 4096 32 86126 92823 1481814 1302807 4096 64 98499 115836 1684332 1639800 4096 128 112056 166544 1961663 1603825 4096 256 79907 175335 2049173 1725266 4096 512 129378 193976 2246966 1992375 8192 4 21171 22766 400314 389112 8192 8 32187 37342 668076 586605 8192 16 51444 53885 727008 812290 8192 32 65901 86905 1033692 1129630 8192 64 76758 107177 1482697 1298858 8192 128 94320 127569 1645911 1210369 8192 256 97133 134162 2147241 1671128 8192 512 90500 135012 1757638 1770864 16384 4 19539 19529 321437 341526 16384 8 30918 35505 516797 524020 16384 16 51349 59549 870331 705721 16384 32 68416 81231 1102107 1027922 16384 64 93930 118699 1768758 1464022 16384 128 99157 123750 1870945 1387997 16384 256 102179 139085 1643188 2115108 16384 512 105677 154704 2257701 1865004 32768 4 21552 22722 286278 402862 32768 8 33737 39653 749718 566303 32768 16 54859 61252 1017924 737634 32768 32 68911 81008 1200426 1056111 32768 64 81933 106823 1614349 1352934 32768 128 105046 136599 2059818 1598428 32768 256 112247 138628 1837374 1510105 32768 512 103603 143168 2118297 1692727 65536 4 21361 23587 395388 378300 65536 8 34805 37463 626892 623741 65536 16 51146 58236 850752 891439 65536 32 73078 90352 1503981 1199016 65536 64