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: Mon Aug 10 22:38:11 2026 Auto Mode Machine = Linux oleg118-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-oleg118-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 1503 3433 591520 39143 64 8 2165 10594 666414 666414 64 16 2111 15187 818885 460591 64 32 3978 24604 1143223 1204796 64 64 2114 34170 285628 1780008 128 4 4934 7913 324039 535368 128 8 2964 9354 883293 809997 128 16 4048 41477 1543594 576161 128 32 4921 15732 1185654 853794 128 64 3970 28349 785122 1162547 128 128 3035 61746 37066 483316 256 4 5240 5304 510138 515279 256 8 4579 5207 250944 780445 256 16 8686 25777 1163562 542347 256 32 6575 15130 1292410 1090308 256 64 10762 14799 1332507 1175022 256 128 5421 27300 1420658 1534342 256 256 9661 30117 1487577 2081678 512 4 3361 3409 659788 135849 512 8 10275 16541 201022 255597 512 16 5481 21128 621413 308245 512 32 8351 30615 449094 882718 512 64 8791 24234 1418599 618371 512 128 19905 25935 1375881 1947291 512 256 16533 52534 1625889 1471074 512 512 15608 73594 1467055 991998 1024 4 7346 4488 225105 127206 1024 8 12725 12289 295943 338965 1024 16 19176 34256 530059 485537 1024 32 19962 39303 1291406 867879 1024 64 25884 45528 1010864 713117 1024 128 23575 49571 938420 1329791 1024 256 22890 71834 1735476 1389145 1024 512 35861 48115 1057663 1670669 2048 4 4367 3363 163214 317665 2048 8 7160 9027 402191 438624 2048 16 7992 15157 638428 1012390 2048 32 15717 19212 320104 831809 2048 64 29642 43481 248941 582336 2048 128 36131 56813 1631886 882756 2048 256 22520 30258 1543340 401721 2048 512 19833 28810 664711 316099 4096 4 5020 5010 353380 252400 4096 8 9903 7962 389356 593805 4096 16 18566 14559 632780 421056 4096 32 15187 17290 337092 309760 4096 64 18680 36879 574312 843854 4096 128 26372 22975 1098962 1337287 4096 256 22886 31888 1617110 883701 4096 512 20212 29622 390435 832204 8192 4 1829 6670 462715 412567 8192 8 12705 8776 225981 235266 8192 16 11399 16442 624191 391658 8192 32 16511 31825 601117 488287 8192 64 28463 30065 391716 568372 8192 128 26685 25485 737827 559178 8192 256 34714 41321 983088 625350 8192 512 31162 41761 769641 1177679 16384 4 4309 5629 324229 237708 16384 8 7766 9857 458971 351158 16384 16 12251 19660 774768 421171 16384 32 14869 18760 641957 644352 16384 64 28409 25128 961732 847281 16384 128 31540 34351 1261954 967296 16384 256 32933 43067 1233658 925392 16384 512 44765 42449 843755 823275 32768 4 5509 6233 204660 225212 32768 8 8217 9707 448133 320883 32768 16 13411 15460 426699 369955 32768 32