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: Sat Sep 5 23:27:45 2026 Auto Mode Machine = Linux oleg445-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-oleg445-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 1619 5827 404998 347801 64 8 3821 12333 720041 679917 64 16 2774 31327 769584 852702 64 32 1801 24616 1163036 582535 64 64 3073 28827 1087638 538156 128 4 3062 7618 574312 149512 128 8 4275 13104 296318 257022 128 16 7787 22046 841746 463696 128 32 8088 43927 1121270 914904 128 64 7746 57475 1123617 1359835 128 128 6074 52563 1336145 1802755 256 4 5591 4802 293227 105126 256 8 4951 10551 172855 205311 256 16 9856 15911 100548 838988 256 32 12763 16970 736041 110822 256 64 9981 19879 1260547 831194 256 128 9027 45463 759469 539892 256 256 14100 34571 1489641 2061693 512 4 3232 3007 409293 220417 512 8 7159 10365 344324 102667 512 16 13250 21511 543555 572081 512 32 20028 39038 1105920 716112 512 64 19176 44024 1279935 296826 512 128 23762 82605 1537424 911184 512 256 18036 44282 487089 1125040 512 512 12022 18786 533297 2107844 1024 4 4407 9490 394004 170294 1024 8 7000 8528 619513 782210 1024 16 9012 9732 210477 427580 1024 32 12598 21637 638485 938625 1024 64 18498 27297 419479 1058967 1024 128 33636 28936 975285 268053 1024 256 23766 31609 634805 521942 1024 512 14995 83131 1253344 796868 2048 4 9346 7600 309226 98193 2048 8 10428 18653 494817 416505 2048 16 16246 18371 156900 589854 2048 32 26113 40571 556963 657687 2048 64 32474 49824 630000 493254 2048 128 28491 25540 201453 592417 2048 256 33239 71209 1493952 377848 2048 512 47388 57366 302379 314202 4096 4 6324 9048 295187 253589 4096 8 12003 9287 378421 355559 4096 16 12040 16574 648938 569684 4096 32 20654 45329 323356 492248 4096 64 41633 31851 821342 277207 4096 128 21496 32004 473525 906981 4096 256 41028 49946 986282 397905 4096 512 33705 36841 825169 395787 8192 4 5607 5701 223112 172151 8192 8 13093 2167 339762 462328 8192 16 11699 17091 452269 538918 8192 32 17087 20060 622303 607536 8192 64 35494 30768 1018042 434769 8192 128 25730 30201 872787 492868 8192 256 21119 44635 792031 1313053 8192 512 70022 83599 929953 828568 16384 4 9878 7617 409960 317125 16384 8 11915 10962 242542 189591 16384 16 11017 11669 468247 334073 16384 32 16110 22310 902353 748025 16384 64 22400 34299 766361 648640 16384 128 26552 42427 1016187 695148 16384 256 32133 39195 766609 448373 16384 512 33930 46723 1084608 954943 32768 4 6753 7093 317267 279078 32768 8 9592 7478 239465 336368 32768 16 14452 20091 789077 557611 32768 32 14253 25864 597737 334856 32768 64 27291 31728 421231 340992 32768 128