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: Wed Aug 26 18:52:46 2026 Auto Mode Machine = Linux oleg459-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-oleg459-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 2942 10774 361380 488236 64 8 4047 15857 621657 328238 64 16 4952 10464 818885 130892 64 32 7437 36468 1304314 901377 64 64 5614 71662 1304314 1562436 128 4 3446 3286 189318 584313 128 8 4658 10685 597981 643108 128 16 10557 28965 1067750 859260 128 32 14744 64382 1306873 1185654 128 64 11097 97192 1306873 1175271 128 128 11117 121304 1504659 624409 256 4 8530 7263 361674 316849 256 8 7293 10144 268851 766517 256 16 20006 15896 1142514 894929 256 32 7524 34311 1334162 1132871 256 64 12191 50512 1213534 1175022 256 128 11209 43604 836374 1504249 256 256 17406 98836 1579483 1851899 512 4 10728 11237 602412 545904 512 8 19141 21210 149226 716112 512 16 11551 30438 647260 674502 512 32 15225 18967 1483267 1105920 512 64 10310 41303 906185 322842 512 128 18759 82647 1701913 781811 512 256 17082 45158 1630828 1585086 512 512 17601 106312 969603 1506154 1024 4 7985 6379 600879 154679 1024 8 7477 15917 362083 192411 1024 16 26598 39472 1030016 722595 1024 32 29696 26714 669226 553489 1024 64 17297 35232 290008 1186518 1024 128 26777 51937 774453 617998 1024 256 49965 86189 1136293 430452 1024 512 24294 36950 998874 1560781 2048 4 5465 5542 258976 238392 2048 8 16438 12960 545988 199803 2048 16 13981 20392 425690 272698 2048 32 15652 17264 702606 344136 2048 64 12530 41115 906607 462301 2048 128 31936 47911 1607757 1213300 2048 256 30640 54750 1271301 1367213 2048 512 19121 57452 965507 1622945 4096 4 6224 6729 342564 204308 4096 8 10409 12983 326533 580345 4096 16 18887 16108 347181 547813 4096 32 15626 22184 358984 338121 4096 64 26680 21791 426672 408084 4096 128 18372 38695 953441 629004 4096 256 24412 52572 963763 683346 4096 512 50207 46494 590194 706211 8192 4 7860 9745 410914 255599 8192 8 9901 11840 430817 311721 8192 16 17660 23720 320511 404704 8192 32 19694 19781 623296 614194 8192 64 33784 42080 535500 603016 8192 128 34255 39833 552018 455115 8192 256 33822 45278 488780 426353 8192 512 37482 81980 459270 487767 16384 4 6761 6353 378103 334572 16384 8 11675 11808 229117 206933 16384 16 19002 14602 398182 494150 16384 32 21453 25838 993331 676074 16384 64 29297 40167 583496 620464 16384 128 35836 36188 933614 810210 16384 256 25527 49025 1333871 796380 16384 512 37945 62510 895148 521052 32768 4 7022 6677 330673 295977 32768 8 13889 12816 473723 278246 32768 16 18269 22132 854582 506131 32768 32 22372 28633 613816 424896 32768 64 23891 33746 574405 390401 32768 128