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 Jun 2 02:19:53 2026 Auto Mode Machine = Linux oleg122-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-oleg122-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 5502 11379 413101 467002 64 8 5840 14466 710511 673098 64 16 6787 22471 1105556 266885 64 32 6850 32342 1232453 1279447 64 64 7809 67449 1599680 1492919 128 4 5954 11655 292922 332467 128 8 9063 20346 831319 795593 128 16 6275 10437 1185654 940549 128 32 5751 19541 1359835 1175271 128 64 7331 34991 1220700 1231904 128 128 9815 55172 1637771 1732927 256 4 6099 3524 625794 445202 256 8 7307 24365 517265 584570 256 16 21052 40176 1108314 1040643 256 32 11227 49277 1325925 1153561 256 64 12320 87847 1089202 1230218 256 128 11765 122898 1347557 1619994 256 256 23287 103435 1607865 2097948 512 4 6334 3886 539595 338409 512 8 13793 18294 1230786 906185 512 16 13383 24055 490426 796306 512 32 28908 22158 785241 1145443 512 64 19406 71820 1418599 1954379 512 128 40134 52968 1492545 1515722 512 256 22254 91773 1770674 831132 512 512 39345 121013 1279935 973118 1024 4 9764 9445 844999 200270 1024 8 7561 9580 507151 310850 1024 16 9229 13980 1145383 1013967 1024 32 12424 41030 1019987 880512 1024 64 40177 63626 976172 1214706 1024 128 33549 29346 671004 1161176 1024 256 59625 52680 835953 567006 1024 512 49892 53680 606307 1151834 2048 4 6614 4017 247286 207858 2048 8 6435 7268 902606 293825 2048 16 11577 12617 402927 518627 2048 32 14695 14426 517971 576745 2048 64 19397 35710 1499428 748525 2048 128 18315 36692 726249 393153 2048 256 39379 53743 1114157 1017908 2048 512 39716 54079 1043759 943347 4096 4 9533 6415 368415 286332 4096 8 12132 7528 429810 251860 4096 16 20563 23498 760211 545777 4096 32 22689 27597 874435 680611 4096 64 36694 47991 778256 596133 4096 128 28545 38978 597606 545759 4096 256 28555 54285 1098119 389091 4096 512 46304 63964 1691796 290328 8192 4 2013 5111 402849 339634 8192 8 9022 12873 326362 426575 8192 16 16855 45942 709636 827052 8192 32 15699 47347 1685969 1029141 8192 64 67676 54638 1351372 1223602 8192 128 45500 100461 2025234 1310100 8192 256 32663 54541 1117287 540869 8192 512 29366 42198 706266 865227 16384 4 3936 4850 231854 173503 16384 8 13377 10189 361039 321039 16384 16 15018 16562 639377 409784 16384 32 15264 45086 2077321 1512119 16384 64 26872 23492 420028 507605 16384 128 30431 46972 1123568 885767 16384 256 28156 49947 565276 647510 16384 512 33126 94869 609773 584226 32768 4 5960 6435 496740 380991 32768 8 11183 12352 474176 528890 32768 16 16093 18778 787427 437040 32768 32 25042 30118 988749 823417 32768 64