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 Sep 13 07:10:04 2026 Auto Mode Machine = Linux oleg313-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-oleg313-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 3214 6987 581273 90662 64 8 4486 3267 158014 537079 64 16 3612 26578 889431 533875 64 32 3873 43130 1105556 901377 64 64 3069 38558 367817 1690338 128 4 2691 16385 99516 202531 128 8 5275 13190 1421023 744820 128 16 4439 22558 247999 785122 128 32 8235 37457 558771 659704 128 64 7139 12986 913347 1142750 128 128 6966 49400 77205 1878447 256 4 8232 9463 483056 589706 256 8 13662 15893 848267 800221 256 16 9863 52826 948698 261517 256 32 11492 76304 131027 445202 256 64 16862 38215 1300235 1175022 256 128 13770 52948 1694118 481324 256 256 8354 100192 1479379 1543163 512 4 7984 11542 828566 177041 512 8 15610 20300 514514 844865 512 16 11769 21014 871966 203575 512 32 26249 23797 1110496 826971 512 64 11122 37934 1204552 328823 512 128 17727 65223 1122687 568899 512 256 23931 39376 823167 482493 512 512 35977 113576 238376 255233 1024 4 4222 8497 556573 109320 1024 8 13993 12876 277205 154290 1024 16 22005 16437 964120 145850 1024 32 16675 41862 1089317 614989 1024 64 21688 45050 790852 634805 1024 128 21652 40961 1551758 629409 1024 256 45265 104158 1319577 683606 1024 512 36068 77924 1732676 815169 2048 4 6356 7381 717333 315368 2048 8 10738 12920 466190 406839 2048 16 22841 18879 1179643 385098 2048 32 26819 29714 718353 504702 2048 64 16420 53661 394380 384529 2048 128 22801 39804 1399740 544397 2048 256 32333 48739 715600 1553950 2048 512 50922 38494 720825 440898 4096 4 6436 7675 249421 326273 4096 8 10980 10715 160006 281453 4096 16 15964 16419 438543 316540 4096 32 20947 21517 612433 607796 4096 64 27628 33492 1520503 435553 4096 128 1629 53069 1454465 504669 4096 256 23157 46903 575119 585488 4096 512 28515 47670 435144 1119734 8192 4 5660 6349 398541 177781 8192 8 10145 12662 494002 290259 8192 16 14982 23491 632196 357044 8192 32 29056 39103 278205 779224 8192 64 18743 32801 386269 299392 8192 128 33255 46329 951455 787619 8192 256 33823 40758 1043708 549353 8192 512 23669 44626 347605 348328 16384 4 7533 7371 345791 249424 16384 8 12528 11839 735669 532569 16384 16 19044 21572 504123 483562 16384 32 25882 41347 844408 630784 16384 64 41483 57346 789245 769278 16384 128 30382 29371 418289 383079 16384 256 47808 45174 715642 967065 16384 512 56644 60720 461728 880095 32768 4 7075 5672 162724 228421 32768 8 9667 13416 220881 256623 32768 16 16222 17579 286503 281652 32768 32