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: Thu Sep 10 08:14:01 2026 Auto Mode Machine = Linux oleg459-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-oleg459-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 2679 4296 658243 591520 64 8 7963 25609 695778 614542 64 16 5170 24260 1049372 727850 64 32 3658 31999 1255511 1163036 64 64 4069 94559 889431 176392 128 4 6562 11539 579270 554157 128 8 10232 21351 921183 571257 128 16 7830 28932 1142750 859260 128 32 10815 78434 1487977 1000121 128 64 8735 100466 1421023 1185654 128 128 16915 102479 1598754 859260 256 4 8692 15932 690151 377572 256 8 6379 14793 128180 615393 256 16 6336 18858 166761 48539 256 32 6058 24226 587127 861885 256 64 11442 96892 808050 246904 256 128 15392 116044 478536 987979 256 256 21312 60418 1686137 2000242 512 4 8717 8623 227035 485767 512 8 4236 12337 484452 393253 512 16 4877 10781 346211 221920 512 32 9092 26165 1042566 487200 512 64 37863 72235 1305615 448344 512 128 42595 79749 1372364 693675 512 256 18179 63784 1741948 1662389 512 512 27153 73081 992456 1520013 1024 4 8210 10736 531436 306218 1024 8 16170 12766 114450 307953 1024 16 20441 25367 916786 190263 1024 32 35523 60331 574669 1024121 1024 64 16995 33648 1206178 828535 1024 128 35747 77056 1279861 831905 1024 256 47405 75936 845664 991266 1024 512 45374 84550 1036478 914249 2048 4 6753 8484 227001 337286 2048 8 14353 14751 374341 293996 2048 16 23365 17123 781983 368337 2048 32 19812 44705 647670 1075650 2048 64 26179 44131 961078 618345 2048 128 29072 68230 1129540 1419165 2048 256 37865 79747 749113 272775 2048 512 22497 34591 1090535 379484 4096 4 6525 6165 195907 178903 4096 8 12044 10419 774014 207707 4096 16 13829 15409 373655 858701 4096 32 16305 35512 807749 786163 4096 64 32616 48328 701482 823468 4096 128 29254 36165 309108 412939 4096 256 1702 58096 1159641 1124351 4096 512 32498 56918 680180 780661 8192 4 6917 6907 301489 249148 8192 8 11519 13298 361324 529468 8192 16 18255 15568 768694 724830 8192 32 25098 37595 661606 534725 8192 64 22669 35181 301253 492042 8192 128 30390 47730 1208964 949903 8192 256 39931 58369 1191234 753506 8192 512 44630 72303 538133 589049 16384 4 7677 7250 185054 168743 16384 8 10677 12561 610320 444671 16384 16 16546 18246 572429 534221 16384 32 22520 35018 946186 496456 16384 64 26890 40020 760837 803371 16384 128 34305 49111 1186131 659370 16384 256 39725 58952 1001029 809485 16384 512 38900 81274 364106 538204 32768 4 5307 7060 244700 240315 32768 8 11564 12384 366782 274090 32768 16 16927 19339 424544 317869 32768 32 19780 30923 804518 704219 32768 64 25705 40803 928529 917900 32768 128