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 Apr 14 16:45:58 2026 Auto Mode Machine = Linux oleg222-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-oleg222-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 5001 13302 627470 385790 64 8 7695 24720 818885 76919 64 16 7301 56886 1255511 901377 64 32 9516 63931 1304314 1066042 64 64 5512 99538 1279447 227718 128 4 7815 10014 546819 304037 128 8 9132 23142 275204 955616 128 16 7743 69230 1142750 836500 128 32 16906 58985 1278855 948860 128 64 15089 114183 516318 1359835 128 128 27461 114917 816154 1885042 256 4 9179 8973 616807 439193 256 8 11148 11387 883152 486779 256 16 9772 73328 666586 1354356 256 32 17887 63712 530031 761623 256 64 45959 39905 1743637 917096 256 128 25987 142864 731528 1354356 256 256 46310 209805 1023775 2419396 512 4 12395 18840 616772 351884 512 8 9255 25971 1705969 217404 512 16 24429 51718 1213400 1032540 512 32 38323 57111 927716 745445 512 64 17450 25346 1064266 690996 512 128 18202 116156 616950 1045103 512 256 67887 65089 948197 1848401 512 512 33424 42535 288105 2265742 1024 4 6478 7915 442332 173795 1024 8 16983 21515 361717 413940 1024 16 18626 32533 846998 703769 1024 32 37373 62699 593981 980853 1024 64 32346 88996 912695 904621 1024 128 63562 168782 1044037 778665 1024 256 37944 73957 617642 2027069 1024 512 42275 49077 228774 497344 2048 4 9925 9046 186929 279822 2048 8 16400 16737 518221 385617 2048 16 36419 30107 559867 249208 2048 32 32695 39062 534439 452106 2048 64 39065 41149 1246398 600031 2048 128 42454 83639 666671 638428 2048 256 23205 64008 1108835 770825 2048 512 43133 60561 488069 382015 4096 4 11683 11714 296640 312692 4096 8 19465 16789 382626 487098 4096 16 20901 30351 580404 1230843 4096 32 35040 37641 862321 371787 4096 64 29469 50272 937315 1167602 4096 128 45693 133415 599964 474519 4096 256 46738 59470 1085903 834914 4096 512 37658 70600 1720256 499504 8192 4 10587 11996 596608 240798 8192 8 17412 18504 329274 290127 8192 16 23704 26789 545013 661453 8192 32 3070 39146 1132907 907312 8192 64 38022 48342 1078737 608623 8192 128 37848 48606 1240656 910606 8192 256 39702 94339 991514 1123866 8192 512 60024 73235 472319 643768 16384 4 10890 11855 292948 253434 16384 8 19235 17892 301847 305951 16384 16 26608 37344 364997 436242 16384 32 39953 44157 947543 787807 16384 64 43114 61328 826225 626877 16384 128 50814 71416 720021 521749 16384 256 54045 45104 1923901 984029 16384 512 65457 144493 1445058 1273719 32768 4 12177 12587 292052 379429 32768 8 20268 16336 598842 491192 32768 16 26442 33578 775208 587020 32768 32 37993 40102 657068 546862 32768 64 31059 58145 1024801 550139 32768 128 41241 76198 550187 778947 32768 256 54286 71422 1207460 986719 32768 512 31813 51806 1052044 1071483 65536 4 8446 10858 190056 159956 65536 8