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 Jan 7 21:40:09 2026 Auto Mode Machine = Linux oleg202-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-oleg202-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 8137 21468 608965 926260 64 8 19729 42049 467002 769584 64 16 24729 59259 1562436 852702 64 32 28009 80302 1304314 969761 64 64 32079 85222 1330167 2561267 128 4 16768 21918 166481 438689 128 8 17807 41803 1206978 719853 128 16 33533 72610 1802755 889145 128 32 23276 90721 1539168 1093856 128 64 41159 125384 1391557 1749872 128 128 44676 141251 1022989 1065630 256 4 19339 27491 522297 445202 256 8 32012 42980 958864 1254656 256 16 31170 90781 1871263 1552085 256 32 31415 93159 1829808 773697 256 64 42944 135218 1298662 980760 256 128 63288 128180 1347557 1260547 256 256 48485 148659 868157 2419396 512 4 21031 25850 560729 762924 512 8 34026 43507 726285 1038532 512 16 47098 73176 1323315 787834 512 32 48999 108613 1376763 904658 512 64 65894 133022 1410215 1176828 512 128 82210 120328 1354190 1467055 512 256 55130 169603 1057454 1496706 512 512 89774 218067 1600443 2065273 1024 4 20895 24628 931702 475801 1024 8 25339 37258 1231070 940269 1024 16 47165 68499 600879 995171 1024 32 57994 116829 1715375 1370965 1024 64 68974 141711 2073055 1126458 1024 128 70378 108833 2316837 1803239 1024 256 70655 211306 1523683 1438461 1024 512 92244 172885 1584972 1675884 2048 4 20433 25111 329889 646063 2048 8 21338 33159 927958 1004928 2048 16 44948 49236 1133265 1147189 2048 32 73119 63378 1511565 1148570 2048 64 71890 118883 1264935 1242791 2048 128 91842 154459 1481839 869267 2048 256 84165 170398 975153 1531781 2048 512 68157 140581 1659632 929666 4096 4 20647 16053 547586 666123 4096 8 32152 41027 971997 775026 4096 16 41002 45625 814489 668612 4096 32 67629 79220 1553922 882747 4096 64 77949 120029 1173343 1335519 4096 128 62038 162745 688163 841952 4096 256 122653 109968 1761711 1538063 4096 512 108434 117014 1536412 1531755 8192 4 21223 23867 411037 518185 8192 8 34621 42498 872965 931339 8192 16 41021 60925 978859 973479 8192 32 73653 90091 1434656 1050248 8192 64 82411 136658 1377761 989372 8192 128 87775 152850 1713462 1033039 8192 256 80683 150251 1656625 967857 8192 512 99910 166065 1784012 1708096 16384 4 22511 23569 524020 557526 16384 8 34649 36494 574535 704411 16384 16 51712 63153 1218672 973669 16384 32 72061 82944 1286621 1172211 16384 64 92907 125207 1618497 1271363 16384 128 107414 135768 1478416 1462184 16384 256 99561 161085 1169955 1179798 16384 512 87512 169207 1564551 1164799 32768 4 21723 20286 569542 432187 32768 8 34640 38633 794009 835917 32768 16 50334 55928 1071165 1066428 32768 32 49059 78579 878238 1179725 32768 64 70605 108980 1708466 1299280 32768 128 81396 115706 1652291 1234997 32768 256 99446 169265 1770668 1418888 32768 512 107740 127491 1765913 1421295 65536 4