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: Mon Sep 7 10:35:26 2026 Auto Mode Machine = Linux oleg435-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-oleg435-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 2946 5428 695778 495445 64 8 2380 8350 727850 735831 64 16 5081 29793 955947 877797 64 32 3318 47411 269025 818885 64 64 5686 59654 1638743 1562436 128 4 4368 8019 518312 384356 128 8 2739 6740 901083 821147 128 16 5364 23581 1015251 719853 128 32 6399 14731 160030 1074159 128 64 6811 84257 1471662 785122 128 128 7952 62074 776042 1827299 256 4 6682 7908 230426 566377 256 8 6530 3722 842278 826078 256 16 4049 6847 449865 904732 256 32 10528 47557 962301 1112909 256 64 12585 48184 1391207 969251 256 128 7667 42069 1552085 842278 256 256 14813 79478 1437779 842278 512 4 4066 4872 359784 506983 512 8 4139 12687 512549 236590 512 16 13258 30191 631463 533827 512 32 12305 27829 917804 1062686 512 64 17487 33242 762924 637650 512 128 19114 45329 1684557 424504 512 256 28592 71568 1701913 1684557 512 512 23244 93724 1442420 2244430 1024 4 3628 4747 604430 82314 1024 8 10550 15097 173472 434062 1024 16 13090 17437 440066 650574 1024 32 11323 16517 1272279 911920 1024 64 29027 55946 1378002 1227903 1024 128 35642 61269 1126458 501935 1024 256 26936 47727 1356245 757382 1024 512 14173 54039 852547 548821 2048 4 9839 8427 263812 472005 2048 8 10599 22085 617278 805371 2048 16 19524 19349 238279 279512 2048 32 14018 12649 1074036 1163663 2048 64 32256 26447 666206 781983 2048 128 20968 57399 378831 599027 2048 256 46292 48552 837649 769927 2048 512 24072 92431 1507057 1457698 4096 4 13122 8125 426884 447896 4096 8 16507 12688 747314 478390 4096 16 15372 23961 396243 554550 4096 32 30610 27870 540811 710123 4096 64 21344 31573 357379 397435 4096 128 33124 44490 606723 650880 4096 256 45901 71796 963980 824615 4096 512 49617 74781 1296221 1001986 8192 4 8669 8477 325179 447213 8192 8 13337 16594 708582 518021 8192 16 19960 24964 442308 291560 8192 32 31352 59897 598176 680285 8192 64 29321 60007 904303 637119 8192 128 36513 58718 598259 803364 8192 256 29703 42966 1020551 801490 8192 512 36484 42139 726485 737621 16384 4 13064 11628 381148 486472 16384 8 18060 15601 406742 441665 16384 16 24110 21885 524288 352556 16384 32 20828 30644 663214 729864 16384 64 25850 35720 626232 638207 16384 128 29734 46653 793263 1120034 16384 256 38182 59227 1005026 706970 16384 512 46780 59656 877937 712098 32768 4 8584 8309 318136 467273 32768 8 18045 17186 489563 388526 32768 16 23278 24748 597226 382629 32768 32 25886 33332 1143173 743339 32768 64 30664 44587 774527 809827 32768 128 30933 48014 1065213 783526 32768 256 32658 59172 896525 657213 32768 512 38285 47956 1278706 918152 65536 4 9723 7333 259222 318482 65536 8