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: Fri Aug 14 02:32:33 2026 Auto Mode Machine = Linux oleg338-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-oleg338-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 1285 1787 615952 614542 64 8 2287 14739 1013707 504762 64 16 2945 15670 39505 140630 64 32 4640 22424 1124074 778512 64 64 4009 37211 811459 1526887 128 4 2843 3378 484625 425478 128 8 2469 8818 285144 221865 128 16 2259 16864 375222 848397 128 32 4905 31001 1133103 296973 128 64 2870 16353 1162547 1121270 128 128 8081 61009 1409828 1827299 256 4 2479 5188 399932 118022 256 8 7861 6759 587127 691930 256 16 12158 26686 463657 787312 256 32 4498 23483 494172 853662 256 64 9157 36036 800221 1075025 256 128 6075 37713 1213534 742146 256 256 10843 20857 839644 1142514 512 4 5590 4854 144545 185450 512 8 5869 7649 823167 575300 512 16 7523 13946 966113 408359 512 32 10107 17155 495633 1096322 512 64 10503 42996 1242896 1115688 512 128 15688 40109 1164070 534891 512 256 11381 15766 1213400 965679 512 512 8193 58621 1528669 2065273 1024 4 4796 5468 160075 152787 1024 8 8456 11262 922497 695675 1024 16 18161 30621 834491 1033237 1024 32 27049 22144 1154621 770010 1024 64 16357 27280 1383774 741431 1024 128 24855 52266 1444266 1275301 1024 256 30185 41695 1164956 1468964 1024 512 37165 58297 1554004 1563622 2048 4 4408 4615 175721 353891 2048 8 10312 10440 493254 252646 2048 16 11422 16155 644029 934317 2048 32 9628 24104 614057 303490 2048 64 17210 42929 742315 416001 2048 128 27323 29152 800045 635641 2048 256 16895 33933 423570 929565 2048 512 27709 44343 1278301 716855 4096 4 5088 3855 274896 185206 4096 8 8260 6203 206231 205818 4096 16 8674 11521 248573 456537 4096 32 15379 15333 709243 539165 4096 64 15491 27440 321866 265388 4096 128 12672 21030 1022988 497566 4096 256 21424 1482 825169 507112 4096 512 33714 39124 467583 417323 8192 4 4571 5709 442672 285515 8192 8 9879 7716 121546 204376 8192 16 11887 7932 357981 327195 8192 32 13676 25477 315028 453702 8192 64 22837 18455 290711 351165 8192 128 23574 26877 569361 508883 8192 256 37097 30215 704875 359502 8192 512 22682 47877 332373 524521 16384 4 4714 5723 216153 148443 16384 8 8234 10519 353437 325745 16384 16 13005 12927 309547 257938 16384 32 12749 15132 827389 711449 16384 64 15923 23315 512706 309493 16384 128 24225 33604 957912 315806 16384 256 23236 24041 611525 450776 16384 512 24999 40131 419446 254066 32768 4 4516 4452 190771 170706 32768 8