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: Mon Aug 24 10:07:25 2026 Auto Mode Machine = Linux oleg324-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-oleg324-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 2939 5675 566551 456673 64 8 1901 14308 639427 383585 64 16 3932 21492 780776 627470 64 32 4615 15656 303383 633392 64 64 1968 33334 647135 1143223 128 4 5331 9606 571865 520321 128 8 3278 15221 748976 413039 128 16 4439 24159 881842 667081 128 32 6052 46616 1076312 870405 128 64 8935 56436 1152564 785122 128 128 9678 65875 1346196 1543594 256 4 6439 6923 453092 291555 256 8 5098 16639 408918 376512 256 16 7443 21689 785010 876662 256 32 5959 10723 84567 399932 256 64 11053 34014 549283 33247 256 128 12458 18634 876662 469743 256 256 5576 25728 1561112 1045710 512 4 4353 5013 312188 469210 512 8 7694 19784 485328 502946 512 16 15646 21432 910797 442159 512 32 19971 47743 189275 882718 512 64 16146 34174 1227971 512060 512 128 16998 41340 584539 455090 512 256 19865 30376 957072 1467055 512 512 12790 47725 502005 910797 1024 4 6616 3601 627845 143319 1024 8 5481 6943 714065 759659 1024 16 13935 14563 1163693 1019019 1024 32 15150 16845 1029275 694214 1024 64 28324 52381 402836 909410 1024 128 19596 37748 1627617 837910 1024 256 24732 70358 319999 798053 1024 512 37647 69910 1345623 1681132 2048 4 6126 6896 390988 131483 2048 8 11383 11259 908621 560195 2048 16 10279 15103 328414 275117 2048 32 14747 21250 575586 516911 2048 64 34427 28818 626097 618924 2048 128 31895 34329 1620190 786206 2048 256 27247 51036 1722532 547624 2048 512 30018 62990 402361 830843 4096 4 5552 5847 241236 130044 4096 8 6928 8370 240137 106069 4096 16 14992 13748 394569 224747 4096 32 16962 15485 316587 471938 4096 64 18632 27196 257415 341841 4096 128 19473 54444 713485 306653 4096 256 35729 45652 501531 630042 4096 512 41135 38107 772239 292907 8192 4 4780 6374 288551 193720 8192 8 7597 12088 265097 288907 8192 16 12336 13605 661224 632138 8192 32 21831 22766 536227 472976 8192 64 25546 15079 402062 678874 8192 128 23350 31591 735301 472624 8192 256 23259 32775 408948 542192 8192 512 33964 46785 1091242 631812 16384 4 6344 6239 214422 184044 16384 8 9101 7916 605203 379609 16384 16 12481 15842 798443 386699 16384 32 23915 24592 667537 831594 16384 64 23286 30308 681471 767980 16384 128 26090 38332 808685 625007 16384 256 31719 45165 567391 728108 16384 512 30879 54867 808970 538909 32768 4 6285 5379 180090 151506 32768 8 9294 10089 411792 228297 32768 16 13664 19098 673463 588052 32768 32 21196 32381 716194 624342 32768 64