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 Aug 10 05:07:00 2026 Auto Mode Machine = Linux oleg436-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-oleg436-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 3478 13106 647135 359444 64 8 5177 22834 720041 435202 64 16 4156 29181 1105556 799377 64 32 4048 48368 1210227 1033216 64 64 5427 52115 1279447 1892980 128 4 4441 11762 202913 486381 128 8 4864 18702 318276 692017 128 16 13123 20106 687585 576161 128 32 11313 59953 992724 178789 128 64 7605 34417 1319723 1114289 128 128 5890 31792 735635 1778862 256 4 5821 9482 556687 545931 256 8 15600 12822 883152 478322 256 16 6006 27297 1248819 212462 256 32 12560 34988 422432 65456 256 64 12248 54342 507006 498069 256 128 19633 70006 1579483 1197295 256 256 15865 143092 1384034 931416 512 4 4538 13906 390536 309890 512 8 11486 8639 807687 235191 512 16 7492 23623 203017 566348 512 32 14947 58870 1437592 1064266 512 64 25818 49626 878386 528962 512 128 16655 34714 949875 691887 512 256 19633 79304 1488408 1488408 512 512 31339 147635 1224470 820650 1024 4 8675 11774 345121 313918 1024 8 18130 22037 812701 325085 1024 16 16094 27708 407306 506433 1024 32 29951 57804 547282 910953 1024 64 21558 95327 504411 700898 1024 128 48063 71378 749060 939446 1024 256 23032 52491 1418508 1244266 1024 512 32135 69376 336733 604515 2048 4 9225 12821 337113 184738 2048 8 16258 18778 305400 478393 2048 16 26645 25809 430081 715124 2048 32 33873 42029 494447 868125 2048 64 25809 40786 1469167 798706 2048 128 35953 43502 786421 683541 2048 256 33233 52821 1159735 638808 2048 512 25633 81244 723192 719135 4096 4 10415 8984 732217 305921 4096 8 16756 19115 674227 552393 4096 16 27557 26134 350868 329685 4096 32 22465 31557 798142 663961 4096 64 26953 49428 1075637 543738 4096 128 43198 66274 1103196 668846 4096 256 28597 47791 676484 560868 4096 512 38711 58950 572303 601561 8192 4 8142 2230 412760 236688 8192 8 13600 19336 351104 424148 8192 16 24700 29151 483104 729803 8192 32 29024 35837 945304 589605 8192 64 36791 44315 1361439 831596 8192 128 30165 57315 839172 696771 8192 256 36781 58686 768901 738493 8192 512 42508 72437 1301366 930180 16384 4 9343 11152 545826 411802 16384 8 14876 14294 537762 614044 16384 16 24576 26614 437386 416376 16384 32 28341 40901 870750 471741 16384 64 28013 57142 1381579 901655 16384 128 47811 55095 1324156 862174 16384 256 50909 51554 962460 998165 16384 512 56989 64227 1268593 751872 32768 4 11158 10948 521036 601357 32768 8 18032 17268 724889 599618 32768 16 28017 32085 659117 770035 32768 32 28482 36769 882779 901932 32768 64 35879 47613 1234432 877224 32768 128 42501 64344 1245033 1153719 32768 256 55623 67956 996744 1090371 32768 512 56376 80412 1142983 1047834 65536 4