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 Apr 28 20:09:47 2026 Auto Mode Machine = Linux oleg337-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-oleg337-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 2811 14401 137320 105276 64 8 4972 25295 220788 198135 64 16 6270 39628 191083 392561 64 32 5634 48666 44718 516414 64 64 5377 62618 1066042 720041 128 4 8282 11221 134459 89006 128 8 8338 25371 118966 281998 128 16 11638 41080 468553 371073 128 32 9327 55774 584950 542400 128 64 18220 92887 800337 971174 128 128 13273 100166 1114289 1939522 256 4 10841 13359 126922 193788 256 8 9210 19395 148331 224359 256 16 12110 40960 365118 356038 256 32 21980 32800 746792 519266 256 64 19448 73208 1153561 684432 256 128 17497 100746 1080434 1016025 256 256 18844 83907 1070737 1552085 512 4 11787 16142 135489 117292 512 8 16066 25684 243015 205288 512 16 27486 40940 408981 310293 512 32 29192 50487 613075 544106 512 64 39423 84627 904658 847532 512 128 36887 61376 1094088 746481 512 256 44860 104879 1375881 681782 512 512 41768 122372 1380303 2265742 1024 4 12371 16096 142340 145830 1024 8 22046 26761 254278 231349 1024 16 36201 49292 368072 457748 1024 32 47681 70179 640484 574285 1024 64 52813 77599 844833 862650 1024 128 65511 116467 1150600 1086836 1024 256 68738 137250 1356245 1136593 1024 512 65427 117202 1541732 1321607 2048 4 13377 16864 147593 134040 2048 8 24640 27354 266116 264120 2048 16 38696 48322 495645 356047 2048 32 49180 55539 651799 558338 2048 64 54664 96141 1003988 795010 2048 128 57594 100074 1150570 1087085 2048 256 56693 106761 1196902 1312882 2048 512 57132 115837 677663 1428131 4096 4 13142 14350 134878 131890 4096 8 21556 27466 231976 240107 4096 16 32110 40671