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 Sep 11 08:54:02 2026 Auto Mode Machine = Linux oleg457-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-oleg457-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 2902 11040 557144 270108 64 8 1522 7999 621657 525513 64 16 3055 16851 913649 385237 64 32 2904 39899 1066042 329852 64 64 2619 58831 18615 1526887 128 4 1863 5923 630273 453896 128 8 5154 7017 692017 621518 128 16 5389 21739 969421 206742 128 32 2942 7954 392792 776042 128 64 3880 26042 1209698 1319723 128 128 5826 27200 1114289 1471662 256 4 6142 5425 368881 249544 256 8 4525 6153 810490 677095 256 16 5385 12051 664935 603970 256 32 5001 17123 903970 493264 256 64 10200 19745 434571 1031644 256 128 9850 14639 1241598 119400 256 256 10989 63743 331217 1718521 512 4 7688 4806 406966 420349 512 8 11891 16946 298021 389050 512 16 8935 15234 986529 486648 512 32 15500 35640 525082 632206 512 64 16051 40826 420678 901619 512 128 7395 26053 944444 1193838 512 256 16014 71962 1158418 1467055 512 512 9220 40615 1537424 462141 1024 4 5867 4987 115224 155149 1024 8 4659 10329 204797 664053 1024 16 8432 23317 207668 243979 1024 32 13196 47365 1058967 172068 1024 64 11751 19810 339635 657748 1024 128 27712 52045 1083819 235188 1024 256 20257 33918 1347734 622476 1024 512 18503 45906 680897 531963 2048 4 7865 8684 164338 327774 2048 8 7257 12009 481207 337843 2048 16 10046 14992 540798 355988 2048 32 14376 24453 430447 346538 2048 64 20446 29081 638808 468019 2048 128 20825 37187 489711 562175 2048 256 33926 51859 685177 569216 2048 512 34548 40503 388459 778157 4096 4 6100 6269 146957 313605 4096 8 7263 10642 464813 343276 4096 16 18023 12235 802055 229776 4096 32 19033 15830 624386 589263 4096 64 20253 34951 710269 382090 4096 128 23033 55784 207941 521458 4096 256 40676 36788 480746 621158 4096 512 30213 62477 924006 283072 8192 4 2093 6200 222282 252504 8192 8 8023 10925 501742 482365 8192 16 12355 18858 362510 359423 8192 32 26815 22641 534933 178451 8192 64 27732 25805 423270 300679 8192 128 23689 41291 720106 619007 8192 256 28433 45553 776564 592380 8192 512 27199 44882 656825 464874 16384 4 4438 6109 251442 209206 16384 8 6963 9027 425637 384464 16384 16 10404 18811 299142 367091 16384 32 15413 21275 504775 415490 16384 64 20764 29306 371461 439285 16384 128 18513 27813 446161 417468 16384 256 32504 32604 460407 543775 16384 512 28641 45556 1162553 547998 32768 4 6074 5773 240504 207450 32768 8 12705 12146 497722 285654 32768 16 15101 15633 605717 466268 32768 32