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 Aug 15 08:47:07 2026 Auto Mode Machine = Linux oleg249-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-oleg249-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 4904 20342 681644 614542 64 8 6790 10807 829001 581273 64 16 6722 55269 969761 874936 64 32 7205 79399 1310683 566551 64 64 5248 64068 844652 1492919 128 4 4361 4629 942199 571257 128 8 7022 4232 285144 794416 128 16 11685 48103 1175271 780556 128 32 8805 29144 2132084 1040839 128 64 12337 18620 1254941 1281909 128 128 4512 63118 1487977 1637771 256 4 11018 6440 625794 165043 256 8 12847 16725 941213 802614 256 16 15249 29736 1163562 483927 256 32 13092 51087 1195962 1040643 256 64 11006 23624 882426 1158540 256 128 15853 115782 1384034 476835 256 256 14230 198627 2192179 1766587 512 4 6972 8658 639930 465447 512 8 16512 17233 565007 681782 512 16 21496 32099 1320061 854956 512 32 18861 49312 1280699 958781 512 64 28969 67235 958781 860437 512 128 32688 73584 1492545 915847 512 256 15008 100944 1533034 1233614 512 512 10625 43236 1057974 2143612 1024 4 4529 4519 280006 69607 1024 8 18116 12905 895007 314492 1024 16 19342 28941 640389 925080 1024 32 13718 36649 805688 825192 1024 64 45070 65860 313139 1092921 1024 128 34387 39945 676393 1412443 1024 256 30483 58766 273289 634523 1024 512 41303 185337 557150 217040 2048 4 5865 7366 312340 210399 2048 8 10146 11088 432986 275788 2048 16 17349 20134 1103423 980831 2048 32 25949 32747 1337619 1114301 2048 64 30228 38093 1788896 1593737 2048 128 29928 34342 1549185 725758 2048 256 39004 35580 1188621 1027528 2048 512 44185 65869 868915 677663 4096 4 6474 6096 286551 249817 4096 8 10108 12521 1188934 772100 4096 16 20455 15813 1203594 726488 4096 32 17738 31758 592597 594216 4096 64 27960 41141 1448335 644314 4096 128 31902 47178 705110 920047 4096 256 34501 60303 1703033 579269 4096 512 38178 61165 742437 918620 8192 4 5812 2668 375385 410237 8192 8 11469 10501 290837 350385 8192 16 16611 22127 544029 584689 8192 32 15666 32399 970866 431976 8192 64 25996 32598 830490 466142 8192 128 34745 45485 764674 840033 8192 256 37140 44814 819204 675736 8192 512 45635 51177 1133206 781155 16384 4 5488 7830 482774 243045 16384 8 10913 14566 353141 549264 16384 16 12767 31845 821582 659313 16384 32 21284 31863 912345 758553 16384 64 46149 34630 882378 782122 16384 128 29175 38642 1105315 880377 16384 256 33495 68402 1402730 685407 16384 512 39677 56015 1071418 894135 32768 4 5720 4999 233167 209518 32768 8 7425 12548 583600 497004 32768 16 14384 20065 686080 725004 32768 32 22726 23375 613517 509586 32768 64 24934 30564 691527 734544 32768 128