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 06:29:13 2026 Auto Mode Machine = Linux oleg414-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-oleg414-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 1642 7624 182757 441646 64 8 2275 25577 381405 546928 64 16 2568 35536 347801 459802 64 32 2026 45903 1255511 886494 64 64 2493 25734 735831 1947927 128 4 2163 6707 346859 171370 128 8 1635 5420 771581 306117 128 16 3801 34042 397444 573699 128 32 6938 32363 1030846 205084 128 64 3677 45340 1217930 1022989 128 128 3662 21063 1306873 2098744 256 4 4473 6610 482839 422432 256 8 4667 6971 505812 677095 256 16 8269 10202 504150 792543 256 32 8236 22624 1052888 508929 256 64 8256 57931 1132871 1219045 256 128 6867 53612 570288 1185399 256 256 9058 54101 201724 1829808 512 4 5319 5041 473660 153701 512 8 2787 7798 317825 314152 512 16 9498 8298 387576 493809 512 32 5571 15218 498625 810124 512 64 14213 30541 620515 664073 512 128 23867 55748 812577 798675 512 256 13962 49159 812577 527792 512 512 20822 73446 1672748 1968713 1024 4 3331 2885 195788 258845 1024 8 12018 8864 402987 283032 1024 16 7169 14073 554417 490192 1024 32 7286 13743 1001903 342124 1024 64 20881 18246 262163 675861 1024 128 15905 17998 706664 933322 1024 256 9131 68646 1338494 1267398 1024 512 21696 56506 1000969 1370965 2048 4 4778 4253 133316 132573 2048 8 3454 4653 422612 418127 2048 16 9866 21176 960971 424114 2048 32 15130 37417 763902 535304 2048 64 28561 35337 707934 516911 2048 128 17887 45975 768756 270644 2048 256 30459 36130 286189 1229979 2048 512 33122 49417 207327 1259372 4096 4 3958 4650 100082 271079 4096 8 5728 6126 372464 295167 4096 16 29613 10830 432297 110897 4096 32 12921 30153 402595 264701 4096 64 40241 37387 428096 736833 4096 128 24263 26179 742437 661379 4096 256 21978 41275 556598 345624 4096 512 35739 57621 475385 713485 8192 4 5009 4936 513277 267004 8192 8 6338 7891 240665 173846 8192 16 18887 16072 751775 409108 8192 32 21167 12315 269712 214850 8192 64 18874 15590 410031 482595 8192 128 24452 24586 339252 324703 8192 256 17866 19484 502050 557699 8192 512 25142 44916 1387498 1136166 16384 4 5723 5663 213848 210143 16384 8 9512 11679 668543 188373 16384 16 13281 16248 570533 461338 16384 32 22148 17159 320819 508664 16384 64 24633 21611 1054370 334709 16384 128 21369 32986 462418 460611 16384 256 28892 30254 629623 643315 16384 512 28499 39916 478868 554659 32768 4 5596 5015 247288 168494 32768 8