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 Mar 2 11:49:02 2026 Auto Mode Machine = Linux oleg205-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-oleg205-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 1315 12556 608965 392561 64 8 2709 15920 852702 14106 64 16 2338 18675 983980 249057 64 32 3798 51525 1304314 528618 64 64 1958 99390 1599680 1460430 128 4 2214 4885 524387 242400 128 8 2951 8575 821147 789741 128 16 2322 5222 15778 1038825 128 32 6645 48798 1406136 1000121 128 64 3800 6713 1220700 771581 128 128 4913 116261 1637771 1642783 256 4 1308 2396 301883 549283 256 8 2567 5891 563997 664935 256 16 3921 10128 1652404 780445 256 32 8817 37585 548161 852984 256 64 15625 91923 1393012 1368162 256 128 16331 18422 1354356 1122215 256 256 6485 44960 416210 1398455 512 4 3486 6970 152025 561315 512 8 7868 13288 971357 387576 512 16 18378 19699 1187895 349935 512 32 9246 13996 85191 642419 512 64 9341 30669 1570020 1082507 512 128 31132 90991 1316016 837942 512 256 16842 57438 884172 1496706 512 512 13876 39441 1625889 1672748 1024 4 3286 4796 151477 298555 1024 8 6099 9703 865605 727244 1024 16 10159 10094 118163 151616 1024 32 25763 34689 322304 463779 1024 64 18745 24530 1294520 427198 1024 128 30382 83734 1434138 746327 1024 256 34335 66918 1575668 315069 1024 512 21630 44071 1771262 140717 2048 4 3558 3850 112275 101085 2048 8 528 7519 582336 490662 2048 16 20330 14654 598651 603445 2048 32 16734 21965 529595 328942 2048 64 21051 24986 1026545 924961 2048 128 36590 39404 1517172 1274507 2048 256 32723 55668 327887 435577 2048 512 24316 62505 488319 1009416 4096 4 4568 4012 470864 170438 4096 8 6182 6557 521126 390204 4096 16 11314 10683 507367 369008 4096 32 18061 26780 458120 752948 4096 64 24654 29115 238626 303135 4096 128 21619 37035 1569395 287799 4096 256 36228 58077 1616502 737371 4096 512 35828 58855 587651 524179 8192 4 4603 4582 210568 126027 8192 8 5568 8492 221663 373399 8192 16 12471 16770 655047 491571 8192 32 13054 31701 936543 585765 8192 64 16338 29226 953885 388207 8192 128 29741 26311 386308 1022191 8192 256 26269 44092 739749 324626 8192 512 28991 40488 1293528 425978 16384 4 4311 5939 194836 161226 16384 8 7727 7790 414440 597151 16384 16 13288 16059 405714 333748 16384 32 18095 27186 653371 648353 16384 64 22907 31759 605533 901761 16384 128 19058 35498 994236 788638 16384 256 29481 36170 708493 694319 16384 512 28487 57462 1045834 706846 32768 4