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: Sun Aug 23 10:31:47 2026 Auto Mode Machine = Linux oleg105-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-oleg105-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 1248 1482 415659 566551 64 8 1286 4987 357529 392561 64 16 2985 16504 889431 710511 64 32 1991 27887 969761 1066042 64 64 3141 52074 901377 1518251 128 4 3889 7544 518312 411456 128 8 4337 11744 355589 374176 128 16 5632 26196 864797 456986 128 32 6404 17962 477301 870405 128 64 6578 22264 786271 1185654 128 128 6499 41842 1114289 233543 256 4 5604 9800 865358 409699 256 8 8079 13075 713067 203830 256 16 3376 23896 613985 394496 256 32 9267 19326 471393 325296 256 64 6812 29822 1201314 955451 256 128 6397 42175 600928 991629 256 256 8559 54934 1332507 812329 512 4 4584 4600 286185 297649 512 8 5663 9592 125585 83824 512 16 9040 17328 549396 186319 512 32 9273 27620 369122 915847 512 64 7993 40757 1216149 83171 512 128 15104 39182 397843 464139 512 256 13874 39050 810124 1064266 512 512 21097 54254 1667552 1657257 1024 4 7697 4895 569487 302978 1024 8 9002 20092 428818 434457 1024 16 8378 9688 888159 858340 1024 32 6927 26777 457115 427538 1024 64 24029 41661 356198 1049138 1024 128 29772 47698 1261072 1146607 1024 256 28496 48727 873705 375933 1024 512 27079 38045 1607514 1244266 2048 4 4841 2885 230504 168894 2048 8 5334 6939 847316 716556 2048 16 15464 14746 232438 152960 2048 32 15744 17940 100693 246067 2048 64 23096 21192 475611 301752 2048 128 14447 29155 257285 272559 2048 256 22792 46595 1488257 276427 2048 512 24515 45277 1419400 320761 4096 4 4835 3830 131700 159135 4096 8 8545 7792 640685 407813 4096 16 15872 16712 407803 283305 4096 32 13561 20890 678595 373387 4096 64 23326 1423 952120 437226 4096 128 30341 28003 783188 571029 4096 256 17255 51516 707928 557664 4096 512 32685 29977 1452989 255939 8192 4 4031 4387 109349 165773 8192 8 6783 7206 442091 441382 8192 16 19175 13372 435563 407662 8192 32 14310 23651 203320 246361 8192 64 16350 23351 636223 646664 8192 128 32893 41600 338233 821574 8192 256 25761 39531 547227 458601 8192 512 24448 47688 404023 359521 16384 4 3552 4140 147907 207820 16384 8 7679 7647 163831 174012 16384 16 13744 13496 424732 357073 16384 32 13777 18165 458870 266862 16384 64 18416 24390 947112 328910 16384 128 24043 23928 386041 581531 16384 256 25872 36994 334135 581384 16384 512 28539 38684 704296 689678 32768 4