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 21:27:43 2026 Auto Mode Machine = Linux oleg331-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-oleg331-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 2530 7733 207798 459802 64 8 1101 10529 389711 598110 64 16 2481 8956 1049372 809014 64 32 3138 31404 500060 1183548 64 64 2225 32873 866463 1638743 128 4 2817 7728 628061 490828 128 8 5109 17679 633247 606767 128 16 11507 14383 338547 508012 128 32 7900 36497 167939 646205 128 64 7189 81581 1065630 1093856 128 128 4741 38577 393656 132665 256 4 5075 4188 343618 377041 256 8 9634 19087 815414 527947 256 16 12821 36344 991629 805021 256 32 5509 32824 1040643 566377 256 64 9116 54191 100154 133686 256 128 12130 118792 705107 1497953 256 256 7769 32803 1437779 2114473 512 4 5171 3921 76076 169656 512 8 11623 10192 505432 385558 512 16 15668 26195 949875 944444 512 32 13673 26628 371292 610114 512 64 20805 18236 917412 473138 512 128 33246 74449 861818 1218910 512 256 31850 24204 1150968 279009 512 512 20684 66918 1523247 1527582 1024 4 4271 5127 395966 331816 1024 8 6421 9510 911920 418824 1024 16 14397 21498 362603 525647 1024 32 11826 38501 1023877 277277 1024 64 27868 29184 922497 1027060 1024 128 20563 30677 1607514 920914 1024 256 11717 80131 787084 1016847 1024 512 18140 130877 1687075 1630707 2048 4 6034 3872 177515 177574 2048 8 6276 8768 454715 345590 2048 16 11260 18000 249057 359670 2048 32 21892 24310 708109 1074977 2048 64 16743 17430 1391351 277096 2048 128 28010 33114 508195 427725 2048 256 32731 69750 1721151 265114 2048 512 39468 31758 1544450 1543340 4096 4 6391 7932 296016 1675 4096 8 11369 11336 454700 308226 4096 16 30671 28951 885797 380702 4096 32 16262 19651 385797 680153 4096 64 27860 36553 358198 650264 4096 128 18543 34157 480249 672670 4096 256 21261 44653 620328 370177 4096 512 18877 48496 834225 750874 8192 4 8191 9272 107837 129046 8192 8 11795 27445 324204 362154 8192 16 12991 20807 637308 411741 8192 32 15310 16004 890637 406673 8192 64 17429 26841 733777 537494 8192 128 28790 42364 904684 394545 8192 256 35407 58624 1108206 632685 8192 512 65165 47062 520193 327744 16384 4 6351 4616 171520 156287 16384 8 8552 14927 343064 637041 16384 16 17289 26195 545116 807971 16384 32 31205 51226 915249 867748 16384 64 38210 33882 1582712 790735 16384 128 29967 35403 646644 635186 16384 256 36996 43644 1020867 634202 16384 512 37131 62399 1152415 583809 32768 4 5634 6169 347490 269371 32768 8 10197 9491 277718 425353 32768 16