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 Jun 11 18:53:41 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 2003 9110 621657 380864 64 8 4746 11065 587635 681644 64 16 2786 32354 855419 666414 64 32 2735 20957 1017549 929467 64 64 2098 30260 460591 1599680 128 4 1893 3675 492629 246632 128 8 3106 14958 723735 718889 128 16 3471 13713 1152564 1000121 128 32 8605 31864 1254941 983630 128 64 5639 54285 1175271 1346196 128 128 5311 41624 1561553 1749872 256 4 5284 7360 325691 106008 256 8 6694 7538 809878 530031 256 16 4746 8582 1158540 447615 256 32 6105 51632 987979 836374 256 64 10423 62914 1118707 51363 256 128 10608 33486 911645 1163562 256 256 11002 15644 897923 450620 512 4 6970 2868 64499 176069 512 8 3081 4332 383766 373748 512 16 4250 14471 102340 766464 512 32 12431 37489 1004057 759685 512 64 20083 57387 1209982 697505 512 128 12080 26045 738777 139893 512 256 7705 55446 585814 799865 512 512 17280 47779 557092 941133 1024 4 3422 3745 371832 336838 1024 8 10202 12317 787661 492553 1024 16 9723 16603 1088213 252960 1024 32 19622 36549 152153 743227 1024 64 11401 24538 535879 1065535 1024 128 21973 47093 1220228 1179674 1024 256 15884 41967 510952 659363 1024 512 13623 41412 379119 895941 2048 4 4603 4852 304674 253721 2048 8 8586 9175 211700 507325 2048 16 8791 11204 1025932 332301 2048 32 35969 18226 346064 267043 2048 64 26857 16616 1191423 351645 2048 128 24593 34360 543811 240124 2048 256 25992 37545 958825 1392253 2048 512 21822 38067 691409 383808 4096 4 3982 4958 203276 178002 4096 8 8467 14370 369604 413108 4096 16 15084 22273 445214 363120 4096 32 18395 36386 364607 490253 4096 64 30793 33358 526073 676351 4096 128 31001 51568 408540 645258 4096 256 20325 95823 845390 639398 4096 512 53751 84217 1272412 616300 8192 4 1986 5596 365666 143209 8192 8 9387 7903 410217 351108 8192 16 9534 11614 701179 426686 8192 32 16830 19161 445849 352361 8192 64 13748 27216 693942 457295 8192 128 24088 33753 939977 695065 8192 256 30652 30002 905996 478395 8192 512 26835 43412 835072 638706 16384 4 3742 3880 314261 405475 16384 8 8162 8814 413726 323034 16384 16 18222 14581 482462 259832 16384 32 11925 21736 773634 449109 16384 64 17394 31759 408386 233583 16384 128 20704 37737 575319 344251 16384 256 23622 29783 354630 310820 16384 512 28368 48967 533557 437570 32768 4 4240 4905 319622 193474 32768 8