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 Jul 4 00:09:03 2026 Auto Mode Machine = Linux oleg303-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-oleg303-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 2398 3327 210569 149562 64 8 3936 20201 186568 582535 64 16 3180 5089 659861 866463 64 32 3472 59312 1279447 998622 64 64 2450 86485 1330167 1879725 128 4 7051 7723 53421 509943 128 8 6626 12609 889145 477301 128 16 3427 25073 1102844 919605 128 32 7544 35039 1278855 983630 128 64 12525 61246 859260 1183041 128 128 17132 97121 1579934 1858934 256 4 2877 4779 301883 568777 256 8 5512 8598 864661 746272 256 16 13509 45157 540164 924200 256 32 22796 45835 748353 1070737 256 64 25690 75473 672010 1262029 256 128 13695 52717 1707589 1600674 256 256 23249 150493 1561112 1053922 512 4 9510 11566 463738 548834 512 8 8794 18900 547017 26420 512 16 17780 21759 1195832 918982 512 32 11151 40143 1410215 1254513 512 64 21242 44282 351654 504008 512 128 17137 59382 1484293 962218 512 256 8446 94466 1657257 1480200 512 512 20001 57181 689222 2055390 1024 4 5098 10158 415221 540600 1024 8 15944 16557 273655 307975 1024 16 23474 18678 631352 933322 1024 32 14853 28647 1213334 645296 1024 64 22521 21056 317327 613934 1024 128 22660 79906 915809 473389 1024 256 34455 86561 1317957 726261 1024 512 31111 109412 1360111 215807 2048 4 3507 5706 655779 271585 2048 8 11083 8448 493481 856526 2048 16 7378 12325 742572 219434 2048 32 24086 33980 417011 902227 2048 64 29884 46620 1480817 1308482 2048 128 22015 41546 759109 649532 2048 256 24152 52334 1706788 547450 2048 512 50134 51747 1106407 1546675 4096 4 5707 6201 515156 323490 4096 8 10555 10033 307922 143372 4096 16 17781 19087 357632 505992 4096 32 25916 31780 491656 538962 4096 64 19489 33692 1565106 471834 4096 128 19787 33160 749924 439014 4096 256 32974 64089 891219 932431 4096 512 30506 42495 247253 859431 8192 4 5420 4568 248801 238361 8192 8 7929 8594 472956 482961 8192 16 12107 16353 381504 267424 8192 32 18936 19916 824136 534517 8192 64 27765 25355 405885 358781 8192 128 32411 71780 959024 929626 8192 256 31108 81367 695234 827470 8192 512 41390 57303 1152980 274189 16384 4 4755 4652 172684 245056 16384 8 10724 11009 539391 286804 16384 16 12248 18207 744089 543328 16384 32 21115 26521 499270 445955 16384 64 27564 37842 1400928 1037152 16384 128 34182 45374 693675 463848 16384 256 25010 51670 758026 632148 16384 512 36480 42284 931324 884422 32768 4 4713 5038 387135 244725 32768 8