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 14 13:49:09 2026 Auto Mode Machine = Linux oleg247-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-oleg247-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 3345 5824 520419 528618 64 8 4473 13233 866463 267684 64 16 5087 19857 155362 789967 64 32 3864 71989 1163036 1033216 64 64 8549 90266 1599680 1526887 128 4 7519 8658 401007 412721 128 8 10923 28008 864797 723735 128 16 6088 45486 1306873 722760 128 32 15847 71025 1598754 1093856 128 64 13666 48193 1373754 1206978 128 128 11418 114818 1521718 2132084 256 4 10005 18114 544547 421768 256 8 12502 22576 985259 821025 256 16 18086 40119 1142514 992545 256 32 17739 47337 1369908 1128110 256 64 15892 63535 690151 984356 256 128 13141 32858 735537 802614 256 256 21139 100709 736041 3454704 512 4 11740 5841 524056 388206 512 8 16922 21165 962218 744153 512 16 16012 26643 311057 178320 512 32 32048 30119 1239310 1127995 512 64 44505 73680 1025636 511572 512 128 34872 37371 1442420 1451192 512 256 19939 174325 2253852 2463259 512 512 27464 92889 1426135 2235086 1024 4 10233 14850 414419 461090 1024 8 19942 22443 415261 903099 1024 16 34988 16527 229189 746456 1024 32 25612 25695 864908 574054 1024 64 18811 67873 2015654 956178 1024 128 37882 71086 1008964 916786 1024 256 35450 46372 1517224 1037731 1024 512 42263 31845 709114 788964 2048 4 10292 5883 431247 120782 2048 8 10715 9929 925858 408795 2048 16 18911 29467 535004 443676 2048 32 24333 32167 1861789 603233 2048 64 31115 51895 756568 702377 2048 128 39652 62866 1453505 915107 2048 256 40134 84593 1021418 921686 2048 512 51448 99615 1197736 1544450 4096 4 9148 10385 418686 449078 4096 8 13968 13461 107537 394832 4096 16 15343 19650 1204353 531114 4096 32 26948 31009 523859 528029 4096 64 46683 43532 725200 366005 4096 128 54571 63079 372497 284798 4096 256 31741 31596 542519 1447236 4096 512 39454 63372 1129303 582826 8192 4 6444 6398 222409 204447 8192 8 9520 13744 627646 541979 8192 16 18134 19653 825879 681865 8192 32 27658 30555 288439 641401 8192 64 37924 32986 641257 983088 8192 128 32628 48998 1034221 841226 8192 256 39278 51673 1458652 1195919 8192 512 41953 48680 355754 837637 16384 4 8704 8759 275014 277879 16384 8 15294 14108 403120 430862 16384 16 17421 22475 465731 945796 16384 32 23174 35731 312141 234459 16384 64 28977 54887 1170214 520425 16384 128 40198 43295 995677 691073 16384 256 37002 61839 1023284 688518 16384 512 41075 54371 1065206 1024443 32768 4 8151 8324 242173 240021 32768 8 13902 15615 465169 360551 32768 16 16077 24026 584434 438397 32768 32 24795 27459 1012331 735881 32768 64 28650 37148 925048 527554 32768 128 27331 46343 542598 552021 32768 256 28156 57650 847505 505437 32768 512 33551 53887 1185096 621218 65536 4