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: Wed Jun 3 20:43:12 2026 Auto Mode Machine = Linux oleg331-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-oleg331-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 2521 8998 520419 495445 64 8 3595 18675 1255511 818885 64 16 3461 29534 1049372 877797 64 32 4808 44695 1210227 852702 64 64 5909 48631 863676 1768283 128 4 6828 12518 1162547 347758 128 8 9308 19384 1579934 662962 128 16 12370 15299 1220700 927549 128 32 12429 17667 1142750 881842 128 64 12464 77854 914904 2098744 128 128 7756 41868 1561553 1658003 256 4 8159 12823 149010 969251 256 8 13684 26592 985259 300111 256 16 14505 31601 1384034 1107172 256 32 15990 59523 1286217 718796 256 64 26337 101585 1004618 1123389 256 128 18838 92990 1610276 230673 256 256 15901 107516 1911233 2102055 512 4 9451 11896 582478 105939 512 8 10127 19062 757274 779258 512 16 20983 44533 1060063 832420 512 32 25665 52265 599553 1062161 512 64 24436 57321 1467055 819085 512 128 40274 107407 1661103 1333173 512 256 32753 124847 1625889 1909204 512 512 32578 94516 1625889 1904125 1024 4 9493 14055 392492 501174 1024 8 17784 29488 1094034 893517 1024 16 26281 47615 1035229 733078 1024 32 41578 62318 1169078 1114185 1024 64 40984 69673 939446 1278718 1024 128 51737 73488 1038483 696578 1024 256 41666 85433 924880 1501313 1024 512 51159 106256 1587902 1460472 2048 4 13430 15631 674577 684467 2048 8 24103 26265 869972 785558 2048 16 36674 44021 782268 479300 2048 32 47267 72900 1334088 954351 2048 64 47698 80649 1528239 1245675 2048 128 55852 119780 1489289 1496033 2048 256 67244 120307 1688337 1521471 2048 512 86464 107624 1975239 1584915 4096 4 13951 15663 659804 398875 4096 8 23748 28143 717717 450114 4096 16 36788 46380 1195553 572475 4096 32 49913 65908 822168 827474 4096 64 58224 75468 1596819 1488361 4096 128 63211 75427 1399832 1139338 4096 256 58906 88730 879719 628107 4096 512 72528 126174 2023826 1731875 8192 4 14556 15210 333781 450904 8192 8 24573 28927 932274 632836 8192 16 40348 45917 1441457 1052694 8192 32 58448 67677 913463 1112873 8192 64 52916 65631 1445094 1220516 8192 128 72593 104844 1417550 1464996 8192 256 76690 112342 1807664 1197670 8192 512 72768 120484 1478168 1194547 16384 4