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: Fri Jul 24 20:20:35 2026 Auto Mode Machine = Linux oleg629-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-oleg629-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 3838 2416 546928 146781 64 8 1708 14191 769584 179819 64 16 3980 20068 939223 769584 64 32 7308 35358 727850 1143223 64 64 8740 49228 686877 1083249 128 4 5403 9527 640042 470606 128 8 4458 23442 790905 533241 128 16 5676 33056 1009524 895074 128 32 12718 44275 1254941 669577 128 64 15509 21167 1243315 809997 128 128 7053 79953 1598754 1539168 256 4 6764 4722 511109 410796 256 8 4413 9212 945356 630572 256 16 8319 8031 862577 206615 256 32 16334 41157 1376935 259370 256 64 6787 28011 1152323 1036624 256 128 10801 105136 1254656 1376935 256 256 24530 79133 1632308 638445 512 4 6208 4405 287488 568296 512 8 6821 7100 549959 778128 512 16 17572 18659 862164 960496 512 32 25096 29679 212542 915847 512 64 14577 21356 1446306 831132 512 128 21435 82156 576535 504482 512 256 36311 102398 1772135 1182010 512 512 35339 140048 436143 605128 1024 4 4894 5866 488741 228774 1024 8 9306 16653 278933 322425 1024 16 28279 27292 1193442 467769 1024 32 17692 43552 910181 1099918 1024 64 17154 29994 840863 1067920 1024 128 14961 43317 1245710 1196434 1024 256 35482 87896 423867 1324868 1024 512 38837 85489 1391395 1424624 2048 4 5791 5312 107647 153408 2048 8 5044 10218 239395 529726 2048 16 14226 35676 571412 505950 2048 32 16111 17694 249302 1157079 2048 64 18173 50685 1397008 347112 2048 128 23293 34293 1174321 1295458 2048 256 50770 38644 413737 182450 2048 512 43115 51991 1045410 771379 4096 4 4616 5964 343392 153875 4096 8 10864 11894 670910 665478 4096 16 16612 13882 404062 562006 4096 32 20228 36445 351407 608981 4096 64 16983 33952 703176 628222 4096 128 30607 40366 901224 441054 4096 256 21197 46893 812217 1095528 4096 512 32864 57226 340028 867766 8192 4 4501 6650 327208 270613 8192 8 10292 10581 604756 306024 8192 16 15314 18722 566172 376265 8192 32 16652 22494 552657 551203 8192 64 24492 46740 1035249 730191 8192 128 22752 32534 1013477 635528 8192 256 36677 34624 547192 386852 8192 512 34048 59157 1030963 550541 16384 4 5833 6761 339213 550148 16384 8 14157 13336 318666 338414 16384 16 16878 22470 642407 356414 16384 32 17110 21998 364590 446297 16384 64 22864 54117 468969 565807 16384 128 24838 31338 473389 444071 16384 256 32355 36874 621806 701642 16384 512 25034 40816 621283 882140 32768 4 4979 4800 188849 131673 32768 8 11543 12430 464078 326484 32768 16