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 Nov 18 19:11:20 2025 Auto Mode Machine = Linux oleg454-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-oleg454-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 3109 18779 253048 87930 64 8 2734 30346 440921 473593 64 16 7257 51112 695778 620221 64 32 3020 58921 901377 542506 64 64 6846 77385 576282 1124074 128 4 4428 18176 263326 247086 128 8 7670 30968 450846 328199 128 16 13002 58503 524387 67295 128 32 10507 30097 563463 643108 128 64 10297 95736 1093856 1165070 128 128 13781 37146 1278855 106759 256 4 10897 8880 226728 234861 256 8 6055 26111 473263 266913 256 16 7990 25125 435452 664935 256 32 11179 76462 927393 780445 256 64 22484 53113 972763 879535 256 128 20069 117376 1306564 1347557 256 256 31777 126102 1487577 1479379 512 4 11757 17767 307494 61901 512 8 20466 17188 432367 407661 512 16 12808 14848 643960 419282 512 32 24263 78755 796306 768658 512 64 38970 96529 1139970 1030064 512 128 26546 52282 1091308 552932 512 256 23029 137899 1551867 1398278 512 512 16587 74041 1380303 1679288 1024 4 7380 10855 222470 222182 1024 8 17280 13022 233729 442697 1024 16 16460 38876 693205 597119 1024 32 18312 72346 883591 400470 1024 64 33499 78060 1116792 552918 1024 128 42074 125211 980853 1207534 1024 256 30186 128465 1305935 1284839 1024 512 17013 80840 1446211 397064 2048 4 6966 10993 168907 235458 2048 8 19059 19905 429350 394525 2048 16 21252 34612 674789 268378 2048 32 31348 43180 895455 474744 2048 64 45535 42281 940764 1000480 2048 128 34546 51723 1246398 647524 2048 256 24163 41567 1433135 1244953 2048 512 43500 81858 1449336 1402711 4096 4 6144 7643 120814 214013 4096 8 15421 13889 261041 401410 4096 16 28044 29613 390799 472717 4096 32 23403 27239 650658 492657 4096 64 31347 41157 345478 333902 4096 128 21457 37999 484967 302000 4096 256 37901 76208 841045 1526718 4096 512 33859 68076 1717505 1255672 8192 4 6880 2097 160006 137720 8192 8 12439 17252 425577 365176 8192 16 18789 17348 590375 408948 8192 32 18519 37555 499910 445485 8192 64 30701 42405 901598 868441 8192 128 41199 65171 858611 953647 8192 256 37806 57740 815278 681702 8192 512 50565 76840 925968 780711 16384 4 11497 10635 169153 164930 16384 8 14523 21642 328120 320740 16384 16 26095 24056 240372 467925 16384 32 34943 40837 811569 709202 16384 64 50388 68997 1142624 864963 16384 128 50514 78735 1019670 873118 16384 256 50303 106706 853564 818422 16384 512 52199 93929 769959 1058593 32768 4 13445 13622 88974 175187 32768 8 14797 20356 259279 222171 32768 16 24472 31758 544807 370284 32768 32 36361 57508 957850 758992 32768 64 46963 68731 540787 692943 32768 128 50676 67011 1242758 691646 32768 256 47282 74814 1483856 847134 32768 512 61052 79377 528217 362177 65536 4