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 26 09:42:48 2026 Auto Mode Machine = Linux oleg159-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-oleg159-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 1836 6567 659861 520419 64 8 3145 14722 508587 659861 64 16 3010 5539 913649 674790 64 32 1918 16120 335206 1124074 64 64 4034 16335 998622 746056 128 4 3952 7402 310006 428193 128 8 3603 9951 595328 618653 128 16 3663 5429 311445 780556 128 32 4389 16601 1015251 819893 128 64 7907 31676 843068 1067750 128 128 6506 32762 1243315 1557024 256 4 3927 8117 203175 442998 256 8 7066 18588 664935 452329 256 16 7271 26256 995306 385018 256 32 6386 17909 805021 891956 256 64 7533 17320 1237306 1123389 256 128 11592 48800 1185399 945356 256 256 14637 50934 73474 156961 512 4 4857 6605 550523 222426 512 8 6868 27743 631277 288609 512 16 15298 18872 115681 850217 512 32 11381 30085 548694 478942 512 64 14722 43243 1129775 1365383 512 128 33344 46882 1270846 428057 512 256 10880 82418 1230786 1387437 512 512 12479 20098 1589779 2081286 1024 4 9413 4993 503465 536951 1024 8 8419 11973 385101 698959 1024 16 11506 18913 371414 442332 1024 32 16792 18450 928479 398279 1024 64 16742 29641 864734 1530197 1024 128 20805 48494 1278338 800582 1024 256 37747 70325 886509 1088213 1024 512 32948 52215 895194 198714 2048 4 4883 3142 124892 306413 2048 8 4365 9271 672622 484846 2048 16 11791 16716 380526 431529 2048 32 20832 19290 730138 1152577 2048 64 21280 21607 1335955 1014302 2048 128 28292 58514 692579 1339497 2048 256 16420 58979 511463 632086 2048 512 18321 29937 252869 538661 4096 4 4096 6005 191100 160703 4096 8 7987 6459 433388 410708 4096 16 8393 10931 510215 170305 4096 32 27025 29369 764303 623072 4096 64 18301 24738 455363 934917 4096 128 28463 29764 566996 518155 4096 256 26141 31855 945933 366107 4096 512 44237 39200 493677 600404 8192 4 2399 5544 369023 335188 8192 8 9967 7947 345376 263442 8192 16 18560 15897 462198 337788 8192 32 13562 18966 753357 561096 8192 64 20219 23963 1000609 456961 8192 128 28764 28937 764895 837882 8192 256 21078 27161 467709 531803 8192 512 25590 36612 826714 715532 16384 4 4239 6274 340573 345378 16384 8 9833 13042 591136 307988 16384 16 18154 18593 556993 445170 16384 32 16968 24996 692507 945236 16384 64 20433 40479 778480 775170 16384 128 35961 43633 505365 386927 16384 256 42363 52935 705873 658385 16384 512 39626 41987 1259825 907393 32768 4 6939 6884 238013 174424 32768 8 9886 12854 604608 334684 32768 16 17205 16634 672632 535530 32768 32 24691 32474 462812 484568 32768 64 25176 23957