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: Fri Jul 17 07:44:33 2026 Auto Mode Machine = Linux oleg333-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-oleg333-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 9885 15552 533875 666414 64 8 15080 38436 780776 484710 64 16 15047 59194 1734015 1484662 64 32 24747 99207 1304314 1304314 64 64 25217 118944 1083249 1933893 128 4 16631 16582 677178 571257 128 8 20622 34887 1421023 1406136 128 16 29712 77249 1142750 1175271 128 32 30075 99534 1319723 1206978 128 64 21958 104902 1359835 1391557 128 128 35456 214765 1755594 1732927 256 4 17021 26443 632056 592636 256 8 31852 30209 958864 1089202 256 16 47379 84209 1339154 1254656 256 32 39113 77505 2463808 1540948 256 64 63777 108482 1455317 1453348 256 128 58958 131556 2097948 1514860 256 256 58157 99764 2872459 1487577 512 4 20148 20634 1034530 608041 512 8 31146 41782 907717 1082507 512 16 41501 67759 1778004 1662389 512 32 42241 91363 1406520 1236455 512 64 69869 112182 2307123 2047551 512 128 75728 162125 2782414 2196227 512 256 96093 152608 1895721 2509312 512 512 103874 197237 1523247 2246778 1024 4 21257 20476 633681 810095 1024 8 37712 44535 1662907 827737 1024 16 57274 63626 1492445 1009676 1024 32 58911 85397 1506051 1736178 1024 64 60684 142477 2160657 1326505 1024 128 104328 162437 2234860 2255990 1024 256 86406 173094 1698417 1389145 1024 512 128839 160129 1858644 2715230 2048 4 18305 22673 719617 611174 2048 8 36291 30090 1646273 1026545 2048 16 54516 56197 2025543 1823453 2048 32 63451 110876 1399740 1955900 2048 64 111876 105576 1516101 1389551 2048 128 105899 148803 1707806 1905146 2048 256 95025 231361 2482062 1713940 2048 512 122458 203698 2412357 1639987 4096 4 19537 18707 694590 864665 4096 8 30527 35814 1096297 967672 4096 16 53329 60028 1264173 1048652 4096 32 70801 83970 1552097 1641680 4096 64 91670 138120 1714419 1302017 4096 128 105624 162339 2019781 1462389 4096 256 101105 175222 2182178 2102849 4096 512 111790 168537 2294686 1615134 8192 4 18626 22614 1042758 804869 8192 8 36442 36343 989258 1379089 8192 16 49655 58669 1832733 1575137 8192 32 70735 87333 1796136 1588242 8192 64 93365 134704 1875858 1909637 8192 128 119156 134960 1729679 1429879 8192 256 94083 138103 1864458 1602763 8192 512 107034 192151 2619719 1893223 16384 4 18686 19750 895405 850680 16384 8 32206 38393 990139 1311245 16384 16 52121 61616 1239689 1440122 16384 32 75645 89051 1816399 1483139 16384 64 82798 107541 1717222 1520416 16384 128 106697 131869 1731370 1491346 16384 256 106085 169244 1799843 2162635 16384 512 118236 161144 2205671 1866017 32768 4 18485 19746 847333 611639 32768 8 31957 35007 1214663 927433 32768 16 50888 59862 1257898 1632993 32768 32 70895 86895 1687323 1648447 32768 64 90198 127666 2328455 1623368 32768 128 104143 141953 1754372 1571452 32768 256 113879 174595 2414734 1868397 32768 512 123986 194580 2269249 1590364 65536 4 18802 20188 886531 907359 65536 8 31797 37490 1507792 1278598 65536 16 53063 64018 1742006 1614072 65536 32