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: Sun Aug 9 17:33:04 2026 Auto Mode Machine = Linux oleg116-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-oleg116-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 1684 12167 634890 489126 64 8 3189 8250 809014 158855 64 16 5012 25806 811459 769584 64 32 5114 45653 969761 1101022 64 64 5289 46243 1492919 216165 128 4 5389 11007 722760 568836 128 8 4697 26037 584313 718889 128 16 6712 25995 976473 127893 128 32 8798 45711 1254941 934004 128 64 10621 50836 914904 1198892 128 128 5131 100466 1561553 889145 256 4 4142 9182 572721 551823 256 8 8422 13938 690151 519266 256 16 10741 32007 973645 1243036 256 32 11105 29057 1208072 714967 256 64 9757 45707 973645 1230218 256 128 17528 91004 1163562 965763 256 256 18271 67761 1369908 663292 512 4 7904 8125 290915 357329 512 8 11962 8319 909640 639359 512 16 15464 29023 878027 914287 512 32 27500 15667 828566 816594 512 64 15520 18419 279045 1467055 512 128 7840 29798 1230786 870905 512 256 27462 70001 1518938 504482 512 512 23789 87403 1689859 2143612 1024 4 6633 5955 646072 117822 1024 8 7836 7596 859026 399390 1024 16 8831 7595 885048 805084 1024 32 13428 13189 564547 440202 1024 64 30677 31556 795687 479841 1024 128 23045 51801 130230 1387798 1024 256 20914 25310 1572783 514625 1024 512 27867 40894 1008017 1034232 2048 4 6255 4970 202150 177193 2048 8 10395 10742 889613 335796 2048 16 10699 12601 447863 986463 2048 32 11630 19062 204124 543226 2048 64 32896 36775 509824 1216910 2048 128 30253 50154 423216 930068 2048 256 47308 41508 459605 378347 2048 512 46136 78431 1750259 697982 4096 4 6578 5486 177823 252001 4096 8 8376 8584 420232 529739 4096 16 17984 16573 646155 283674 4096 32 14596 27267 497998 450905 4096 64 34853 27730 175051 416090 4096 128 20091 30688 901792 1001227 4096 256 50182 62045 417445 1493277 4096 512 34000 65470 399180 339182 8192 4 3825 4659 233197 259823 8192 8 6854 7684 504305 510471 8192 16 18007 14153 644989 465372 8192 32 12670 25573 413609 507088 8192 64 15719 21790 746013 746629 8192 128 20006 28413 375369 530260 8192 256 25412 52233 981796 505559 8192 512 20066 40963 525942 251427 16384 4 4565 4396 290053 141562 16384 8 7029 5441 227748 312005 16384 16 9267 14109 232367 168688 16384 32 15261 21628 691455 551021 16384 64 19985 29991 801133 615546 16384 128 27640 31730 728564 793795 16384 256 37314 42976 937026 909014 16384 512 36522 39502 615987 1096654 32768 4 4632 4773 240640 205722 32768 8 7381 9134 418898 311456 32768 16