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 Jun 11 21:00:39 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 1603 11485 566551 542506 64 8 3239 9981 608965 780776 64 16 5129 12910 1049372 1002351 64 32 4871 27478 1083249 780776 64 64 4003 38277 1562436 1562436 128 4 3405 10808 659704 429563 128 8 6666 18430 643108 688467 128 16 6637 41829 1093856 948860 128 32 10297 36477 826202 881842 128 64 8019 49919 1278855 1015251 128 128 6239 58097 370050 1622919 256 4 4183 7249 520272 302905 256 8 2923 4923 827989 257010 256 16 8315 28225 116688 334206 256 32 8004 29157 1306564 596587 256 64 11013 55930 1287760 1168627 256 128 16910 65273 1778290 1514860 256 256 14109 68892 1607865 649647 512 4 6409 6965 148750 179708 512 8 8127 6851 765371 112724 512 16 10770 19525 1032044 644927 512 32 14752 44857 494150 516743 512 64 13614 28390 867738 550523 512 128 22103 45657 1484293 883081 512 256 15618 41572 510478 764009 512 512 17861 93106 723105 2169601 1024 4 8741 9485 256311 345955 1024 8 4033 9739 731455 304590 1024 16 16341 8365 321797 223477 1024 32 18400 48591 1250061 1102176 1024 64 28208 56611 848337 816563 1024 128 30556 46994 1008727 1065535 1024 256 23836 35771 899883 1162433 1024 512 36010 84712 352138 377287 2048 4 3504 4168 280773 377019 2048 8 10555 9008 150844 304264 2048 16 10956 13527 266670 472966 2048 32 28862 37447 1190103 690964 2048 64 29960 55160 1293702 697529 2048 128 38232 33418 684958 1249662 2048 256 20178 53076 1442279 1424106 2048 512 30037 53708 948660 1005399 4096 4 4342 4428 165061 166449 4096 8 6274 9983 207961 199000 4096 16 7728 13529 438163 424416 4096 32 15317 23628 445226 577148 4096 64 28094 59075 925649 828152 4096 128 23016 39388 703896 464725 4096 256 22609 42685 1633097 449031 4096 512 24690 41489 388616 601035 8192 4 3986 1777 219013 302311 8192 8 8968 7785 327089 208957 8192 16 16578 15815 679330 429798 8192 32 21595 31746 392562 1189996 8192 64 21696 27055 769710 508409 8192 128 33604 41821 868727 507493 8192 256 26524 46898 435513 662039 8192 512 36475 42888 1086034 831576 16384 4 5306 5169 307720 123254 16384 8 11815 7517 323590 233743 16384 16 8508 12883 231278 616330 16384 32 12882 13669 413122 427647 16384 64 14755 21076 449012 243704 16384 128 16821 20429 868077 327719 16384 256 32292 45058 974774 781570 16384 512 31614 31093 865323 318271 32768 4 6169 5666 237859 236693 32768 8 10281 10215 733575 412353 32768 16 16654 14830 869989 401003 32768 32