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: Tue Jul 14 12:23:54 2026 Auto Mode Machine = Linux oleg141-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-oleg141-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 1831 4322 627470 666414 64 8 3598 14662 659861 712397 64 16 2146 28218 939223 363337 64 32 4452 54930 1124074 1310683 64 64 8707 72730 1255511 1304314 128 4 4249 9162 691126 544601 128 8 9718 15528 831319 389091 128 16 6045 28686 1057236 715059 128 32 6793 28673 976473 217638 128 64 9567 88101 1332828 877518 128 128 6480 117662 1359835 843068 256 4 6039 11350 568777 484801 256 8 12406 17210 537729 703721 256 16 15596 33618 1044693 345943 256 32 18276 47397 1152323 1169901 256 64 27417 104451 1208072 1180188 256 128 20678 117647 755195 1347557 256 256 16495 94156 1591186 2097948 512 4 6693 10489 419282 744153 512 8 5371 7626 439445 504482 512 16 16943 20954 1150351 750919 512 32 25641 51262 806171 1174254 512 64 22095 75539 1895721 1210664 512 128 12928 82025 1645826 1463057 512 256 27401 79912 506385 1084694 512 512 26062 56004 1488408 2207515 1024 4 4047 9833 328416 613145 1024 8 13538 21480 225199 409910 1024 16 8051 19134 217777 640389 1024 32 29561 51826 817807 1200447 1024 64 28494 50301 181691 656441 1024 128 38573 81347 275039 786507 1024 256 26123 37907 2178189 1381993 1024 512 49759 123967 2311849 613145 2048 4 8083 7458 320653 329257 2048 8 9879 12109 301890 406666 2048 16 7706 14007 464828 600073 2048 32 29604 35916 793541 887682 2048 64 33115 48865 1639674 1024097 2048 128 42394 41075 935946 544397 2048 256 31101 75815 523527 1064453 2048 512 38627 43200 1061166 988962 4096 4 6633 4456 243203 147465 4096 8 9027 12173 274365 186801 4096 16 10396 11662 699939 253499 4096 32 18119 23174 878010 813640 4096 64 23278 34458 828992 1199057 4096 128 37388 43109 930059 633363 4096 256 33895 54869 642915 852818 4096 512 37710 51479 1735023 604737 8192 4 6137 7385 168306 173559 8192 8 7705 10244 452293 491922 8192 16 16534 18918 641760 515217 8192 32 24989 31327 1063479 801247 8192 64 31479 46073 965681 859599 8192 128 31519 57828 694995 536621 8192 256 41482 37980 1270051 1164626 8192 512 39221 53976 1114569 513676 16384 4 5470 5117 462291 260476 16384 8 10504 11083 574434 494862 16384 16 14588 13764 539336 278814 16384 32 20750 33335 829867 659585 16384 64 29708 57987 922374 520740 16384 128 26495 33715 1073510 679692 16384 256 34979 33809 623606 892520 16384 512 32898 50206 494044 510755 32768 4 6538 4751 295084 197237 32768 8 6562 8841 380236 492448 32768 16