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: Tue Jun 23 15:07:44 2026 Auto Mode Machine = Linux oleg423-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-oleg423-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 1525 3906 500060 340306 64 8 3545 6815 771797 686877 64 16 1704 18823 560635 743988 64 32 2850 34411 1143223 863676 64 64 1960 23477 1183548 1828508 128 4 2042 12264 336848 453896 128 8 6616 5297 187402 706589 128 16 4978 19551 566435 520321 128 32 3659 21401 992724 662962 128 64 5087 63589 962469 1291158 128 128 5780 23256 348888 1997245 256 4 3457 10189 572721 158912 256 8 8863 9714 82022 134170 256 16 5887 5247 744204 375853 256 32 2666 19080 127556 472430 256 64 7831 45953 442998 988889 256 128 6341 40526 1293967 1112909 256 256 6656 95453 1790149 1802167 512 4 4985 6045 629796 354791 512 8 7293 10599 764009 304227 512 16 6320 25624 549396 693675 512 32 6480 13062 381788 955368 512 64 19286 53045 872320 713021 512 128 15598 44778 1413929 1319250 512 256 19464 73288 1401929 410231 512 512 20428 71220 765371 2014892 1024 4 5690 8215 104618 296822 1024 8 11164 16020 796277 298203 1024 16 7755 20139 612446 938420 1024 32 23746 29227 628580 927677 1024 64 11473 31121 880512 652650 1024 128 25170 43057 1410588 1132697 1024 256 13431 60677 842182 1340164 1024 512 22905 67363 354551 705735 2048 4 2887 4333 292614 231616 2048 8 8352 9437 772559 427470 2048 16 16819 28762 572059 434541 2048 32 17539 15216 807263 278950 2048 64 15891 26328 545434 1118509 2048 128 14841 23813 404331 1207501 2048 256 40877 24955 1003402 643594 2048 512 44083 56803 489962 1412398 4096 4 3096 6340 284780 189805 4096 8 7764 5544 334643 274457 4096 16 13895 13686 365188 320049 4096 32 23012 29880 397518 506918 4096 64 39883 27278 576161 496846 4096 128 23526 27057 1781625 1029918 4096 256 27995 36738 592944 452604 4096 512 41838 52247 522982 1235979 8192 4 3791 5008 128391 154118 8192 8 7092 5618 548879 254788 8192 16 7914 16361 772167 735836 8192 32 18772 13409 345741 303588 8192 64 22529 22980 470611 457040 8192 128 27465 27480 361453 487387 8192 256 36081 40633 373927 720438 8192 512 24281 35864 204959 488489 16384 4 4776 5934 296678 218602 16384 8 10163 9233 359047 199338 16384 16 14402 17039 365127 347515 16384 32 13840 19403 456647 292102 16384 64 21516 31340 576496 437503 16384 128 30156 44120 1126607 572386 16384 256 28704 35784 600758 347952 16384 512 25325 36156 610455 710309 32768 4 4953 5656 216190 328722 32768 8 9913 12896 368640 251559 32768 16