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: Sun Nov 16 20:49:52 2025 Auto Mode Machine = Linux oleg357-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-oleg357-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 2509 15579 228493 254006 64 8 3047 23415 392561 353760 64 16 3540 41292 627470 383585 64 32 4815 58651 769584 686877 64 64 3507 77385 1105556 1304314 128 4 7349 15522 278922 62045 128 8 8494 25377 501839 503723 128 16 9573 48155 688467 568836 128 32 7166 67085 826202 135306 128 64 7545 90967 1085013 1007629 128 128 12953 107121 1030846 1561553 256 4 10286 12850 268582 249254 256 8 14375 11318 418971 366239 256 16 9407 47903 638445 577651 256 32 20763 77769 797250 718796 256 64 21895 86342 736041 425108 256 128 19263 110163 907792 1260547 256 256 28356 126608 1340826 1260547 512 4 7695 6208 246502 50230 512 8 5403 27501 58287 386738 512 16 11041 51364 592604 467983 512 32 27252 67778 796306 663252 512 64 9445 70483 978885 907717 512 128 22987 95952 1224470 1084694 512 256 32753 132065 1062161 1383861 512 512 35699 42440 459177 2063289 1024 4 11514 12617 312002 194828 1024 8 8481 10168 433012 436090 1024 16 19746 38075 612795 621665 1024 32 34239 78946 478291 714065 1024 64 51584 31182 1024121 966941 1024 128 26346 92736 1148139 1121751 1024 256 50972 124485 1389145 1253344 1024 512 45360 82726 1442326 706664 2048 4 5355 8080 119794 176963 2048 8 17266 20876 382952 188269 2048 16 27815 26377 616127 624776 2048 32 32523 75191 434278 417193 2048 64 31923 48053 1036454 1054522 2048 128 21628 79248 841094 591764 2048 256 39096 93536 1705432 1421279 2048 512 54011 77882 1598780 754309 4096 4 8124 7861 151764 173425 4096 8 17153 17008 161316 373452 4096 16 29545 34992 706937 231700 4096 32 31488 33996 653679 708161 4096 64 37297 46872 1036192 1007628 4096 128 40454 71513 1390879 720637 4096 256 35840 68064 1590757 1388406 4096 512 42073 77958 794745 595782 8192 4 10133 11710 230701 226317 8192 8 3073 25088 439181 364556 8192 16 32579 35594 642060 562520 8192 32 29858 46948 784687 687582 8192 64 34730 58750 452817 536018 8192 128 44213 65312 1249181 909305 8192 256 48668 77489 1143806 605204 8192 512 64285 119682 1705976 703475 16384 4 13248 14931 215681 231317 16384 8 22688 23361 375332 229121 16384 16 35413 40062 549761 522964 16384 32 42512 49230 364941 381351 16384 64 50438 62362 729895 576414 16384 128 57494 76791 1031408 958232 16384 256 47735 62338 1023421 971192 16384 512 59998 66620 1346812 1187668 32768 4 9915 11282 213762 152342 32768 8 21013 23673 439378 312913 32768 16 33355 43335 573870 529936 32768 32 48249 62349 560109 598271 32768 64 48432 67207 775134 719403 32768 128 34876 54739 589171 776751 32768 256 48426 78304 1023549 1050894 32768 512 60959 55887 791153 752143 65536 4 8748 10404 179282 160235 65536 8