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 Jun 12 12:25:45 2026 Auto Mode Machine = Linux oleg658-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-oleg658-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 4003 20119 586352 508587 64 8 6458 22758 743988 199460 64 16 5155 39459 904414 789967 64 32 5457 48897 1083249 633392 64 64 10583 69116 1049372 1679761 128 4 10211 7629 187992 465304 128 8 8412 9784 506097 468553 128 16 12692 42061 1175271 202531 128 32 26722 46242 1121270 919605 128 64 8785 69150 1076312 1057236 128 128 12069 41560 1471662 1939522 256 4 7648 18604 265527 113075 256 8 11958 14339 787890 815414 256 16 14501 48762 648079 269459 256 32 26034 59026 1049800 852984 256 64 15670 54134 1267990 402632 256 128 16796 120242 1375171 1235882 256 256 9924 45519 1588832 970126 512 4 8514 5842 542320 264312 512 8 12539 20507 815353 336184 512 16 10124 23561 971797 321392 512 32 33292 40336 1267097 314106 512 64 23119 54254 1402845 1127995 512 128 29753 55895 1080328 958781 512 256 18290 48687 493809 496206 512 512 21816 50200 536226 2073249 1024 4 7581 11246 352861 238307 1024 8 18340 16729 198723 364418 1024 16 17860 27418 695675 299680 1024 32 27080 36764 315185 717046 1024 64 26550 32091 379521 194528 1024 128 18820 41002 807505 1244266 1024 256 29814 102154 255929 278174 1024 512 31091 70577 202652 273934 2048 4 6478 10939 270440 238696 2048 8 21698 16891 199901 132401 2048 16 19302 22039 664248 477276 2048 32 17630 30024 522730 547904 2048 64 42676 35229 744696 765877 2048 128 41756 77405 361137 430706 2048 256 24121 78149 916767 898171 2048 512 38310 43711 657084 630139 4096 4 7715 9001 445850 334200 4096 8 15106 17526 291758 379793 4096 16 21674 31341 537176 347532 4096 32 41464 55414 822837 757696 4096 64 53615 94575 685527 534369 4096 128 52283 73897 662016 447651 4096 256 48230 55737 953652 1309061 4096 512 40408 139233 548460 376992 8192 4 13141 14282 3168 238855 8192 8 12679 22992 289591 243650 8192 16 23711 31786 590334 314509 8192 32 26273 30015 517171 671143 8192 64 36686 44053 837801 431590 8192 128 37454 85433 758797 481567 8192 256 36755 41717 837107 789900 8192 512 42412 55877 1595322 416492 16384 4 7095 9620 285630 428442 16384 8 18308 19242 431270 464937 16384 16 22787 27952 548457 527156 16384 32 32830 46904 597826 634817 16384 64 43301 57582 680789 704448 16384 128 35848 55893 766754 598832 16384 256 46243 69161 610618 675124 16384 512 45380 78053 545293 619648 32768 4 10553 8366 312438 224643 32768 8 12846 18201 459244 415099 32768 16 17541 29711 610284 452277 32768 32 27900 31538 943671 589237 32768 64 36695 46864 1053496 747597 32768 128 30985 43184 507591 388163 32768 256 35066 50755 690929 467120 32768 512 32688 79202 801665 652904 65536 4