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 Sep 4 11:13:42 2026 Auto Mode Machine = Linux oleg638-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-oleg638-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 4148 11355 524487 400168 64 8 4465 11235 674790 546928 64 16 4907 22766 1013707 901377 64 32 6845 31904 1183548 942521 64 64 3579 57606 1143223 1562436 128 4 3375 7428 551878 508012 128 8 4912 7690 441576 509943 128 16 9582 31105 473930 426492 128 32 15853 45781 320748 985435 128 64 3341 42626 1229084 435487 128 128 12833 49692 410199 1852520 256 4 7293 6537 475147 312606 256 8 5960 14255 527687 592636 256 16 7485 5433 649647 495312 256 32 8174 29230 1202660 1052888 256 64 7689 15751 1354356 1108314 256 128 16618 27081 371048 1321031 256 256 19170 107516 1471270 513063 512 4 6653 8308 272911 107520 512 8 3941 9011 138370 75084 512 16 17406 11370 953671 484452 512 32 16192 37171 1038532 964378 512 64 21190 37274 1014013 973559 512 128 28828 44347 1358474 647455 512 256 33396 53029 1406520 593915 512 512 21522 71609 1343179 2007358 1024 4 6056 7400 125580 357800 1024 8 12447 13983 306590 250540 1024 16 14427 16147 964336 378251 1024 32 11237 42670 343053 408623 1024 64 18987 50613 594310 920125 1024 128 22635 45396 480969 1131503 1024 256 19321 54639 330412 1091532 1024 512 25501 95915 976172 1022902 2048 4 6177 6705 110719 139662 2048 8 12800 9471 285031 146369 2048 16 12195 15118 971074 303361 2048 32 23170 23587 186880 693810 2048 64 10612 43675 550678 601628 2048 128 16104 29913 338842 707176 2048 256 38550 68715 377450 596365 2048 512 35249 121746 1153196 781698 4096 4 4560 5490 298604 146050 4096 8 7707 16653 593887 396088 4096 16 12824 15503 327704 172710 4096 32 1209 24193 612892 481771 4096 64 23902 31682 457497 908804 4096 128 17432 42264 404700 291575 4096 256 25485 63998 847476 851761 4096 512 47741 39488 614097 774747 8192 4 5357 5140 372262 166819 8192 8 20984 16337 450803 288745 8192 16 14820 17346 212299 333645 8192 32 22419 22262 565594 589899 8192 64 29059 21087 528897 359532 8192 128 17637 35457 498995 354586 8192 256 23543 44208 430957 210688 8192 512 26149 41032 907384 1218136 16384 4 5366 6671 309833 445932 16384 8 10915 8542 414060 351776 16384 16 15706 18995 650624 550946 16384 32 19802 24932 601774 420771 16384 64 29770 40609 453648 336441 16384 128 34247 42337 499346 536603 16384 256 23850 38602 1082677 855967 16384 512 37653 49202 682127 411782 32768 4 5447 6125 177721 190454 32768 8 11029 11825 380085 192581 32768 16