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 00:36:19 2026 Auto Mode Machine = Linux oleg347-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-oleg347-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 5429 11206 15579 176857 64 8 3570 15477 388021 218452 64 16 3304 40946 955947 633392 64 32 5981 32373 555990 1210227 64 64 6242 23678 877797 1562436 128 4 3907 5107 603357 227410 128 8 7302 10932 670413 278199 128 16 3447 31157 1096089 853794 128 32 8171 28225 1142750 380003 128 64 5984 41570 719853 1165070 128 128 7091 52393 1471662 1911894 256 4 8684 10571 456172 399932 256 8 5017 14484 257010 617161 256 16 10287 9150 992545 853662 256 32 14926 46595 102644 646518 256 64 14418 67176 211707 1075025 256 128 14919 52730 486779 1345868 256 256 20280 98051 1514860 1514860 512 4 6571 11327 671969 373683 512 8 13013 9279 242905 568899 512 16 15682 19969 366789 479476 512 32 11104 29137 649806 944860 512 64 20525 43250 1309596 1174254 512 128 19083 55363 860437 1273861 512 256 19374 101951 543006 1045103 512 512 11585 104638 948197 1130370 1024 4 6854 9927 240495 316742 1024 8 11905 15173 815169 194045 1024 16 18164 35324 1180972 747496 1024 32 14232 29901 1385560 398464 1024 64 26926 57473 1000969 693317 1024 128 13786 68226 1048113 673318 1024 256 40300 54560 1516688 1040496 1024 512 34402 98245 785932 1202127 2048 4 5553 10047 170679 214921 2048 8 8938 14986 452106 164090 2048 16 14954 12973 525256 913841 2048 32 20226 19479 426218 253998 2048 64 21271 58751 731443 1125839 2048 128 34062 45929 617234 417782 2048 256 29582 49912 644657 589854 2048 512 45421 39660 820840 1412398 4096 4 4990 6859 215114 196469 4096 8 7155 7631 271507 159507 4096 16 24347 21062 345186 611714 4096 32 17239 27991 921725 236393 4096 64 26182 37783 791341 366693 4096 128 35870 36224 654625 303296 4096 256 26747 36565 840880 813024 4096 512 40135 52128 1817051 1516476 8192 4 7230 6008 319216 338290 8192 8 9420 10801 261575 337353 8192 16 16347 15136 276055 371791 8192 32 18621 19825 484699 440031 8192 64 22963 36925 492932 712535 8192 128 24484 37279 698371 667635 8192 256 24541 39878 572702 828808 8192 512 34069 48189 941290 425445 16384 4 5675 6293 201137 206926 16384 8 9335 10214 329666 395959 16384 16 16216 20539 636004 296543 16384 32 20870 33048 768882 304552 16384 64 28901 44969 331023 442966 16384 128 29001 49564 402228 420954 16384 256 40805 60222 820307 893495 16384 512 41588 49104 1058267 464729 32768 4 6168 5468 259443 181022 32768 8 8786 11467 355663 340273 32768 16 14263 16292 532839 396293 32768 32