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: Tue Jun 30 20:37:44 2026 Auto Mode Machine = Linux oleg129-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-oleg129-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 8856 12817 208606 576282 64 8 12066 25177 188269 735831 64 16 12436 36280 1828508 877797 64 32 10498 45383 1255511 939223 64 64 12534 114725 2561267 2772930 128 4 8653 17558 692017 1015251 128 8 14859 26353 819893 344854 128 16 17358 53114 1521718 1175271 128 32 18782 65473 1997245 876086 128 64 17107 102813 1048974 1802755 128 128 12747 84535 1727352 2558895 256 4 11807 15323 1003679 407676 256 8 12183 24485 1237306 682258 256 16 16260 41244 663292 1012194 256 32 28692 80125 1332507 1256123 256 64 29127 97006 2310087 1153561 256 128 33079 99690 1495866 1683493 256 256 33697 124149 1694118 1956506 512 4 14625 16753 1047141 541773 512 8 24025 23154 1438555 707152 512 16 26946 33405 1289156 829847 512 32 35009 91231 1283761 1230786 512 64 31943 88659 1434711 1707325 512 128 52170 98840 1210664 1174254 512 256 58870 112252 1541840 1030558 512 512 58668 155066 1931527 1983258 1024 4 14915 13909 672369 384240 1024 8 22996 27930 1081363 1164956 1024 16 37567 52631 982873 1312720 1024 32 31614 58434 1501313 1045817 1024 64 49619 80045 989440 1037480 1024 128 60445 116033 1492963 828375 1024 256 70358 140373 2598591 1635675 1024 512 60595 159056 2089189 1681132 2048 4 14253 11948 893499 642968 2048 8 19311 27265 1624172 782553 2048 16 37014 45987 1019479 1018874 2048 32 60769 60208 1450315 852615 2048 64 65251 66104 1159735 968337 2048 128 56431 114196 1280015 1508115 2048 256 75695 118175 1336787 1498120 2048 512 64604 118060 1756343 1903457 4096 4 14149 16172 736960 692490 4096 8 24008 24125 836459 730784 4096 16 36933 43530 887353 1116387 4096 32 52280 71056 2314159 1247285 4096 64 63094 96462 1448335 1762615 4096 128 78070 120865 2100278 1601284 4096 256 66184 108950 1854315 1415401 4096 512 77733 131025 1378159 1944126 8192 4 14763 17035 739351 675524 8192 8 25798 26658 626684 769486 8192 16 36987 45080 1623130 771664 8192 32 53898 74067 1955167 1698890 8192 64 75135 80952 1633781 1349833 8192 128 72481 98022 1627358 1187939 8192 256 74781 99316 1316828 1752707 8192 512 85291 118910 1430892 1214176 16384 4 13041 14332 667316 733854 16384 8 21688 26166 1055601 960939 16384 16 38826 43503 1274522 1064728 16384 32 49354 63606 1757405 1229486 16384 64 56493 84982 1265276 1218693 16384 128 68993 93822 1281008 1248201 16384 256 69226 100474 1445423 1527377 16384 512 69799 100567 1846066 1540007 32768 4