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 Aug 13 10:46:41 2025 Auto Mode Machine = Linux oleg249-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-oleg249-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 6600 17753 256923 224480 64 8 10384 30033 300665 326641 64 16 15943 44481 688639 603489 64 32 16736 64639 695778 533875 64 64 16190 74756 926260 969761 128 4 13082 22022 244275 203529 128 8 17346 30747 397444 499970 128 16 24705 50534 503723 531131 128 32 23417 70135 847059 601330 128 64 32939 80204 877518 1000121 128 128 30910 120623 2211113 1406136 256 4 15778 20693 240813 188514 256 8 20670 30125 424604 467290 256 16 34118 51528 992545 721210 256 32 34830 82210 962301 838988 256 64 35944 89071 1099237 1123389 256 128 38607 108242 1632308 1622442 256 256 49515 132156 1369908 1884399 512 4 16044 19366 381516 249625 512 8 24032 34742 435789 528441 512 16 35917 52854 625941 557237 512 32 44310 72582 788992 786391 512 64 52192 93243 1086890 970041 512 128 59444 96821 1252318 1302447 512 256 52217 122841 1514652 1501940 512 512 58142 144099 2381315 2894940 1024 4 16548 19257 258315 254972 1024 8 27730 36274 522196 456144 1024 16 40989 50894 693317 549663 1024 32 44166 71364 813933 629040 1024 64 63354 96168 1617808 957884 1024 128 68353 125705 1340582 1230718 1024 256 73241 127918 1821595 1350701 1024 512 71744 151099 2068064 1664841 2048 4 16677 18077 260066 260168 2048 8 26581 34546 559867 468325 2048 16 47094 52997 457768 644463 2048 32 55376 81877 1080657 864543 2048 64 72973 97288 1153815 1007876 2048 128 70336 95109 1118509 985558 2048 256 77708 110882 1337828 1239027 2048 512 70127 130487 570123 1322178 4096 4 17581 19132 276084 243200 4096 8 28658 32457 538658 432929 4096 16 45324 55649 681313 618630 4096 32 61696 82602 922914 838827 4096 64 70191 90439 1224875 835564 4096 128 80411 126353 1579641 1131534 4096 256 85843 126458 1577900 1382818 4096 512 84912 117846 1197303 1078134 8192 4 17785 18755 275871 258519 8192 8 29238 32163 454856 444637 8192 16 44699 53829 692069 676975 8192 32 61880 76548 909618 890245 8192 64 77149 99834 1171295 1017378 8192 128 80745 112823 1460761 1089650 8192 256 92874 130230 1626665 1286216 8192 512 92808 136692 1799617 1405432 16384 4 17990 18979 288888 274007 16384 8 29167 33492 559637 459398 16384 16 44972 54452 759500 733784 16384 32 64249 80199 968209 891259 16384 64 79866 97605 1248133 1081961 16384 128 86058 119447 1415442 1364434 16384 256 85157 122949 1576720 1352937 16384 512 100663 127944 1727149 1566334 32768 4 18342 18744 246865 245670 32768 8 29754 33470 529224 451785 32768 16 46701 53605 730254 491295 32768 32 59783 69756 775558 715347 32768 64