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: Thu May 28 14:02:02 2026 Auto Mode Machine = Linux oleg344-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-oleg344-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 3501 7688 598110 621657 64 8 3308 25097 877797 383038 64 16 4487 37670 889431 913649 64 32 5927 37444 1124074 1066042 64 64 3552 44444 710511 1255511 128 4 3390 7467 75692 38730 128 8 4389 10231 301138 649331 128 16 4212 24724 426492 723735 128 32 3932 55200 1220700 348661 128 64 6565 26159 357483 1278855 128 128 8921 19882 1243315 1967960 256 4 6558 7191 515032 541253 256 8 8808 11826 362162 503913 256 16 6904 17021 952062 232522 256 32 6041 16488 386126 805021 256 64 15221 61805 1543163 1093639 256 128 7918 21338 1497953 1453348 256 256 16469 17212 1673001 2030503 512 4 4895 4545 485218 317214 512 8 10594 16281 859060 849208 512 16 6103 16350 457124 534491 512 32 9291 19268 256759 202443 512 64 14239 44103 369122 896725 512 128 11199 24874 285881 446758 512 256 9762 60909 603767 180600 512 512 11747 71409 349992 191111 1024 4 3599 4072 168695 413223 1024 8 7658 12259 352861 448522 1024 16 14581 27953 731455 107157 1024 32 18864 30729 465235 1070048 1024 64 25443 30077 1460472 214225 1024 128 13718 52079 1025099 527585 1024 256 24731 71012 133525 1000969 1024 512 20261 58745 1665486 997019 2048 4 5215 7604 644029 340710 2048 8 8432 12090 477489 341618 2048 16 12081 35844 667344 504435 2048 32 26524 18158 1029621 932593 2048 64 37018 31718 264600 499391 2048 128 20589 59876 970525 572059 2048 256 30109 64206 1117200 754376 2048 512 23063 55765 470686 1524983 4096 4 5683 4965 219481 286112 4096 8 10383 10564 361675 265577 4096 16 7925 13387 590621 324333 4096 32 17106 16786 448434 357922 4096 64 16221 26551 1359940 265901 4096 128 15987 50054 290436 426481 4096 256 24868 53215 607173 478110 4096 512 25293 27240 365452 145952 8192 4 3952 1967 204370 300347 8192 8 9245 8999 426247 406370 8192 16 9644 10407 429015 405645 8192 32 18448 12770 677015 193944 8192 64 19653 22685 561793 387917 8192 128 17465 25448 323971 357512 8192 256 23538 39027 549326 625771 8192 512 31131 39384 417682 358635 16384 4 4120 4744 162039 226880 16384 8 6567 7577 316274 244865 16384 16 12498 16119 384277 453978 16384 32 16459 19255 565532 589670 16384 64 18361 29441 366377 380924 16384 128 21658 29653 635410 605133 16384 256 31312 41274 638177 604867 16384 512 34479 52327 425668 514395 32768 4 4855 5061 230877 286476 32768 8 8338 8452 215257 337609 32768 16