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 19:51:11 2025 Auto Mode Machine = Linux oleg203-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-oleg203-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 5017 14489 353294 269837 64 8 5446 27244 397208 413101 64 16 3299 16592 551422 503814 64 32 2215 57967 743988 771797 64 64 4834 72066 1045286 1421755 128 4 4454 16760 291649 247542 128 8 4440 8806 447464 399812 128 16 6956 49610 707520 531131 128 32 5627 23831 940549 747933 128 64 7965 34078 1243315 1185654 128 128 5364 90203 1346196 1642783 256 4 4537 9987 84882 82711 256 8 12649 28434 445942 311066 256 16 16953 46776 741633 603630 256 32 17130 71326 559005 666586 256 64 7837 18798 1169901 823544 256 128 11186 112083 1430119 719277 256 256 9661 62914 1740810 2000242 512 4 7383 15227 242988 264572 512 8 8116 11344 68733 423833 512 16 14610 52713 385835 656360 512 32 7468 19908 844865 713970 512 64 17829 77717 1066910 984720 512 128 9898 85049 1391032 1336492 512 256 13261 90826 1350783 1506154 512 512 15752 95453 1446306 1764853 1024 4 5906 5686 200382 160004 1024 8 12223 23042 242190 449885 1024 16 10112 11441 638390 421413 1024 32 33970 66149 660987 652650 1024 64 32212 87156 1115342 1039489 1024 128 32072 100067 1298041 485317 1024 256 31586 70078 1368780 1151834 1024 512 29895 67435 1572783 1587315 2048 4 7600 6252 75329 227929 2048 8 9121 19090 463573 285362 2048 16 30271 24953 789530 491027 2048 32 31912 29673 472654 826447 2048 64 35489 75958 1265868 872180 2048 128 22127 49367 1396100 1206823 2048 256 45743 113607 1343897 1027036 2048 512 38416 78413 836263 1481839 4096 4 7557 11796 269988 94169 4096 8 16639 18667 340459 204954 4096 16 19796 26156 365126 159868 4096 32 28702 45617 598043 733248 4096 64 49722 35600 1032518 910442 4096 128 53165 51938 498852 498475 4096 256 44261 99941 1651623 1344192 4096 512 30116 38130 1107320 1466509 8192 4 6671 9445 158867 196361 8192 8 11821 15059 273158 326310 8192 16 16173 25808 209348 513116 8192 32 22694 31157 770798 493611 8192 64 33462 48936 937310 887738 8192 128 37924 52305 1077350 841844 8192 256 41232 61957 759217 978497 8192 512 43068 59131 1240656 1515393 16384 4 9257 8777 245530 209128 16384 8 15318 15220 177771 153899 16384 16 16436 17232 611618 348343 16384 32 24785 34479 522101 560308 16384 64 30120 39575 1065966 664368 16384 128 25409 54927 1298264 700734 16384 256 52614 60529 957565 1028568 16384 512 51362 102011 751699 863909 32768 4 8446 10043 136071 131148 32768 8 15545 19493 184810 260317 32768 16 21289 26054 541969 313695 32768 32 28974 33623 743424 604074 32768 64 33209 35360 529550 1001560 32768 128 35727 66118 441011 502706 32768 256 39651 57764 496928 635013 32768 512 40540 43738 808308 578776 65536 4