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: Thu Aug 27 09:21:25 2026 Auto Mode Machine = Linux oleg413-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-oleg413-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 2311 9592 610350 500060 64 8 3599 13445 760859 771797 64 16 2130 20310 426219 821391 64 32 4926 13802 1124074 712397 64 64 3383 49346 1232453 1780008 128 4 4227 11328 498114 272965 128 8 5893 22206 275911 384356 128 16 9062 34024 744820 498114 128 32 7426 53688 466923 1059322 128 64 6472 30095 876086 1032829 128 128 6183 70605 155173 2166499 256 4 7103 9841 439013 487664 256 8 6034 12528 572721 248505 256 16 7422 18108 1023775 768712 256 32 11473 38601 1147398 927393 256 64 17651 36097 509895 850956 256 128 9982 30163 969251 1306564 256 256 9209 62045 1619994 495084 512 4 7377 7702 603089 555220 512 8 14050 16758 460062 250120 512 16 12431 34496 458687 885996 512 32 15424 19875 711133 1030064 512 64 9318 59757 1340664 600223 512 128 25436 80049 1276891 1171691 512 256 12424 68845 1410215 1537424 512 512 20985 86355 671969 1954379 1024 4 10370 4645 301257 92311 1024 8 9855 18756 428990 484387 1024 16 20984 29729 1052480 434809 1024 32 9867 21495 246981 637159 1024 64 24401 27538 224470 1168760 1024 128 28324 27558 1060013 673635 1024 256 35643 52974 399836 1412443 1024 512 23009 78138 994941 1689730 2048 4 4905 7896 207012 250210 2048 8 11872 14663 377085 428622 2048 16 18737 34375 707176 262907 2048 32 24474 43619 907374 1196235 2048 64 33627 45074 730386 1155057 2048 128 21204 42354 1481839 713579 2048 256 23067 63243 1577928 1337619 2048 512 37629 67085 564985 1537539 4096 4 5890 7070 184638 332931 4096 8 10909 13254 542725 522982 4096 16 20185 23936 556220 607345 4096 32 21089 28537 559025 335460 4096 64 21895 48603 1113060 695659 4096 128 24960 29136 748812 963763 4096 256 37128 66711 655574 384889 4096 512 34031 71457 986736 835239 8192 4 4899 5687 264419 263154 8192 8 14827 17772 485795 347370 8192 16 22626 15834 280719 361918 8192 32 24092 2654 663689 707604 8192 64 26176 37690 918468 473471 8192 128 17473 31862 583012 631905 8192 256 34342 29860 1032108 801247 8192 512 28401 29021 963650 596473 16384 4 4413 6619 374132 361565 16384 8 8045 9923 164741 149408 16384 16 12374 13564 348587 256216 16384 32 17623 28179 389918 523885 16384 64 24389 29379 523047 602375 16384 128 26960 28712 586274 505320 16384 256 28180 40659 566941 334859 16384 512 28679 37148 410307 442740 32768 4 4996 5762 359167 325874 32768 8 9154 10737 320858 485674 32768 16 12295 16779 526376 354750 32768 32 16752 23749 413742 454945 32768 64 23881 33224 378969 543145 32768 128