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 01:08:14 2026 Auto Mode Machine = Linux oleg631-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-oleg631-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 2663 4474 576282 512471 64 8 2107 30798 111903 390278 64 16 2216 21227 1066042 998622 64 32 2162 50717 1330167 712397 64 64 3854 58882 1599680 1734015 128 4 3131 3020 707520 54214 128 8 5226 18540 291491 743788 128 16 8808 25286 401307 99002 128 32 13938 69266 1175271 612303 128 64 6647 35115 1057236 1504659 128 128 13393 83497 1579934 2098744 256 4 6831 8237 602276 596587 256 8 12297 13232 778183 299776 256 16 7822 25299 682691 944525 256 32 6363 40583 639967 58649 256 64 15721 91656 1481420 613985 256 128 12124 78000 403237 1375171 256 256 9909 148331 844929 1405778 512 4 4917 7371 488530 443254 512 8 15676 19466 808904 811655 512 16 16683 24478 660600 572691 512 32 18709 21185 1158418 390820 512 64 8505 44664 898225 763195 512 128 29743 47144 608903 170559 512 256 11415 84404 709957 661414 512 512 32016 77906 598717 1809465 1024 4 3068 9585 101859 194010 1024 8 11695 11358 898377 640484 1024 16 11332 12130 611400 578228 1024 32 29721 46251 991266 1045053 1024 64 19836 36319 1217461 629778 1024 128 24265 43066 1019019 1242826 1024 256 23791 107584 596788 340767 1024 512 15441 29810 930894 1416169 2048 4 5343 5026 127880 261897 2048 8 11432 8419 889245 287608 2048 16 32555 15672 394743 414236 2048 32 30534 41487 1388428 1203273 2048 64 25074 17086 891644 338402 2048 128 11684 30159 568425 388249 2048 256 14787 35308 214829 1397918 2048 512 44487 60041 549059 1515031 4096 4 4733 8023 307900 471019 4096 8 7785 6781 184197 174916 4096 16 7913 15006 418125 217514 4096 32 14127 13958 232198 309342 4096 64 13680 23381 581308 495771 4096 128 42102 75679 866846 1293294 4096 256 76135 47959 1560982 660642 4096 512 25998 31333 680746 361386 8192 4 5564 6195 337383 251395 8192 8 6530 4807 275796 146055 8192 16 5862 9419 175402 758446 8192 32 36825 37142 531425 461707 8192 64 19848 24994 615933 252193 8192 128 22803 61742 815123 785207 8192 256 22560 49598 1123755 1103898 8192 512 56818 51963 664125 813752 16384 4 6701 11609 147442 182502 16384 8 14667 13056 644105 715829 16384 16 28337 29534 500015 334292 16384 32 13983 27618 435396 496152 16384 64 22575 49848 528295 358551 16384 128 25023 51976 984607 346450 16384 256 46528 50959 816012 838187 16384 512 49326 86909 1359118 500565 32768 4