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 19:45:39 2026 Auto Mode Machine = Linux oleg460-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-oleg460-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 3462 3399 653436 546928 64 8 1803 8930 855419 118734 64 16 4616 26153 516414 842003 64 32 2201 61542 571375 1033216 64 64 1719 63870 998622 1780008 128 4 5661 2945 501839 564055 128 8 4428 6337 1007629 723735 128 16 3893 10165 1022989 914904 128 32 6534 56662 934004 643880 128 64 8068 21929 1421023 1093856 128 128 5381 67295 1391557 1997245 256 4 4507 2830 656399 143571 256 8 3425 17908 850956 740100 256 16 15850 20784 977189 944525 256 32 7605 36378 1437779 531080 256 64 14030 82160 1267990 1256123 256 128 11977 90140 1629830 1629830 256 256 17687 59952 1649865 684432 512 4 3873 4173 206116 275289 512 8 3594 7226 839252 691887 512 16 11627 43334 919375 754083 512 32 6163 30884 1103647 942786 512 64 31986 19487 999850 496091 512 128 33207 57866 144837 74395 512 256 16593 22676 135815 1091863 512 512 15099 37435 1689859 1118011 1024 4 5145 2786 263030 530321 1024 8 5535 11437 379521 194124 1024 16 7171 15486 1043783 123596 1024 32 17864 19681 764799 274529 1024 64 30899 48498 226398 269044 1024 128 31500 80631 1279861 1444266 1024 256 44983 69137 833196 1070048 1024 512 18308 67612 1015885 961529 2048 4 4377 4481 370546 141699 2048 8 11876 13016 262835 396364 2048 16 16770 28212 1145507 427300 2048 32 25557 32006 805371 739058 2048 64 28924 39125 634233 553517 2048 128 21970 34486 752921 990787 2048 256 28780 33936 1287304 1255690 2048 512 28640 42587 176276 566513 4096 4 4768 4289 245462 179736 4096 8 6680 8057 353373 313800 4096 16 9218 12746 509972 366146 4096 32 9645 11385 617141 242798 4096 64 15473 21873 895913 539301 4096 128 13398 29219 401334 248135 4096 256 19251 30371 192444 240982 4096 512 25041 27937 870536 494686 8192 4 5751 4114 89318 157257 8192 8 14734 14024 382174 358075 8192 16 20328 25618 695882 617560 8192 32 19233 23446 577069 528889 8192 64 18805 24166 264660 308491 8192 128 22518 28764 352361 244865 8192 256 31322 31633 844182 627875 8192 512 24299 30295 549019 372379 16384 4 3181 3039 148098 88643 16384 8 6382 9427 481556 468877 16384 16 15171 18803 521203 354831 16384 32 17979 20402 363766 685379 16384 64 27819 30320 954161 399969 16384 128 25338 33407 965529 1016954 16384 256 32505 45914 1265370 679269 16384 512 37051 58343 785053 544697 32768 4