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 Oct 24 09:36:41 2025 Auto Mode Machine = Linux oleg235-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-oleg235-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 5467 22847 93019 481234 64 8 7791 37450 829001 395452 64 16 17847 56479 926260 863676 64 32 5180 82045 969761 1232453 64 64 9040 79801 1562436 1124074 128 4 12357 22145 84883 558771 128 8 19124 36332 757430 669577 128 16 18980 53806 831319 722760 128 32 8241 76414 859260 1076312 128 64 11696 112367 465708 1349580 128 128 30694 125121 1618028 1057236 256 4 12673 16499 590031 489442 256 8 15739 32388 867455 867455 256 16 19156 35630 635047 545931 256 32 40641 92621 1148625 1040643 256 64 24146 158023 876662 1016025 256 128 20685 102399 1304976 1570244 256 256 32197 159101 955451 2015259 512 4 16931 13723 648041 572691 512 8 31470 33748 847532 932550 512 16 37920 55906 920953 941133 512 32 23371 44673 1282994 1010197 512 64 52594 101932 1450212 1273861 512 128 21376 148063 1426135 1354190 512 256 48156 126517 1689859 1594501 512 512 47328 183705 1815584 1875849 1024 4 11292 22126 532226 239864 1024 8 21265 28893 766437 235989 1024 16 43130 27583 1023145 885778 1024 32 43533 93269 1115342 1214706 1024 64 45452 118286 1261072 1071116 1024 128 61850 88989 1194770 928479 1024 256 26565 118859 1026078 1400926 1024 512 30552 84030 1735476 1490891 2048 4 12522 12757 627652 400000 2048 8 22215 21832 992734 780774 2048 16 26413 30691 1285570 838631 2048 32 36200 87975 1216910 818182 2048 64 31193 45880 1273562 1068824 2048 128 39039 60323 979378 700886 2048 256 56482 102339 1460673 1130878 2048 512 37595 37214 942932 1194904 4096 4 10152 14968 662246 608421 4096 8 20731 17501 1063320 765052 4096 16 36853 56216 990833 545551 4096 32 26878 48951 1328086 1394152 4096 64 47951 54150 1469645 1102276 4096 128 42161 95169 601098 503752 4096 256 80998 97526 1665715 1383375 4096 512 91385 99596 1751295 1464384 8192 4 15726 16209 344083 593711 8192 8 22529 26730 777901 594050 8192 16 40172 44549 860503 841164 8192 32 50957 73690 1217402 951113 8192 64 79413 96892 839069 706092 8192 128 88005 101933 1331163 1008983 8192 256 60826 96144 1558561 1590080 8192 512 89871 123920 705237 1162655 16384 4 5789 19734 466486 532466 16384 8 36934 31555 933678 779452 16384 16 43261 53774 830579 787581 16384 32 65328 71892 895101 624314 16384 64 54754 69607 1185701 925280 16384 128 59308 114686 555502 1028891 16384 256 54936 36492 354617 341675 16384 512 34081 79600 479259 413935 32768 4 10561 12909 288613 427117 32768 8 16728 14885 462099 562908 32768 16 20091 26719 742954 517164 32768 32 43466 72940 539196 406445 32768 64 64671 89428 1504913 989162 32768 128 68391 112875 1588746 873389 32768 256 77309 90478 1383314 925883 32768 512 92143 121251 1305240 1042168 65536 4 14453 15754 505070 508867 65536 8 27107 31777 911629 632086 65536 16 40616 46028 822818 907496 65536 32 45452 71720 1151997 943641 65536 64 70857 77965 1300835 923913 65536 128 69861 104024