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: Sat Mar 7 13:01:39 2026 Auto Mode Machine = Linux oleg156-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-oleg156-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 6645 9496 133099 87672 64 8 5835 10718 236131 203853 64 16 4567 31203 365314 342040 64 32 9402 36617 555990 529661 64 64 6145 53818 799377 681644 128 4 3907 11939 114598 91681 128 8 6566 20385 269404 121772 128 16 8744 37869 518312 373136 128 32 12875 58097 286360 586868 128 64 17486 52393 985435 794416 128 128 13013 62962 367768 1406136 256 4 7853 12202 62562 56006 256 8 14196 23562 222407 262284 256 16 16177 38934 274698 267179 256 32 17954 34311 602276 220128 256 64 23180 56990 507006 370536 256 128 17169 108526 859127 488551 256 256 24854 94049 1158540 659625 512 4 12102 12626 83443 94482 512 8 13575 22994 211996 97211 512 16 19348 27797 470237 279955 512 32 31716 55979 529483 433152 512 64 24383 73006 713021 465447 512 128 18733 86795 1053304 540002 512 256 29243 77259 1150351 782951 512 512 42909 126012 1450212 1734911 1024 4 11053 11371 96961 100707 1024 8 16361 20200 198640 188758 1024 16 24978 37444 360170 332922 1024 32 27006 49240 615694 375506 1024 64 38803 81521 724668 764663 1024 128 31902 58457 1102176 671004 1024 256 29127 83667 1033237 881958 1024 512 44450 80377 1171629 2081090 2048 4 9304 10666 102857 96366 2048 8 16637 21430 184274 206098 2048 16 29329 42539 338802 257810 2048 32 31782 56754 430793 426748 2048 64 45382 66714 733505 362539 2048 128 39469 80247 513665 966050 2048 256 31566 71150 380105 789239 2048 512 49957 81819 1313685 1103423 4096 4 10230 9794 114002 118190 4096 8 18279 20713 185472 137800 4096 16 28039 34756 219683 268890 4096 32 39151 48941 374127 515806 4096 64 39310 81510 508433 431472 4096 128 46265 75903 608895 778856 4096 256 59799 81856 1163017 1002220 4096 512 59319 91002 1113060 875371 8192 4 11367 11900 109095 88966 8192 8 17495 20256 175095 206784 8192 16 29626 33139 378382 338750 8192 32 43880 53122 562602 445606 8192 64 51502 63075 933668 695712 8192 128 58414 79677 990799 663856 8192 256 60163 70865 1046346 1014614 8192 512 62445 72093 1124638 1163324 16384 4 12113 11828 108078 107750 16384 8 18738 20972 200022 208045 16384 16 31810 39550 394167 355740 16384 32 40381 53517 551574 489176 16384 64 52272 61038 778375 662223 16384 128 57656 6276 1008862 906149 16384 256 60998 86401 1190962 764894 16384 512 66517 92177 953658 982790 32768 4 11496 12313 128755 113675 32768 8 18542 20886 201626 205578 32768 16 31893 38386 364875 312118 32768 32 42920 50304 481246 459464 32768 64 52941 67502 742552 695344 32768 128 58369 82696 1128215 905969 32768 256 67207 83572 1434108 987286 32768 512 65701 86814 1403028 1123805 65536 4 11493 11934 105418 99055 65536 8 18412 20839 210426 197939 65536 16 26371 31848 319088 318295 65536 32 41199 51850 496262 463633 65536 64 52883 65174 815620 653811 65536 128 59128 77305 967492 829527 65536 256 57247 75716 876418 767914 65536 512 61779 76006 935226 909427