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 11 07:54:48 2026 Auto Mode Machine = Linux oleg332-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-oleg332-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 2194 8106 557144 614542 64 8 3921 11758 780776 718114 64 16 1588 32420 983980 1002351 64 32 3860 32110 1330167 1013707 64 64 7055 70329 1648808 1828508 128 4 3942 10432 743788 573699 128 8 4470 9543 907174 706589 128 16 11454 31809 1032829 902598 128 32 5764 51219 1332828 1067750 128 64 5604 50534 1421023 1440082 128 128 5592 97051 597981 1967960 256 4 4935 6769 641880 549283 256 8 11073 19174 850282 390195 256 16 10473 34654 661250 630572 256 32 15156 53367 1361224 1108314 256 64 16933 55945 1552085 1319408 256 128 18589 98015 1543163 1487577 256 256 8824 32343 580461 2135500 512 4 8534 6576 540681 583744 512 8 5367 14844 411884 844865 512 16 7906 12671 997991 842214 512 32 7967 31459 393542 598884 512 64 23569 77178 378157 1289156 512 128 12861 65708 1143004 1169140 512 256 9286 32296 1565443 532767 512 512 16684 50889 1595686 2187279 1024 4 7632 8384 218842 586759 1024 8 8859 14242 548821 377851 1024 16 9607 32738 937805 1014925 1024 32 24530 45340 476276 856115 1024 64 22117 40973 1454537 1221964 1024 128 23805 82533 1160862 1081363 1024 256 41112 89370 1231070 1322828 1024 512 37716 61516 948995 878890 2048 4 6320 9028 386050 301139 2048 8 11290 9805 935131 791057 2048 16 16046 19926 638191 154390 2048 32 23702 20073 594467 170622 2048 64 20367 47892 334033 496849 2048 128 27695 76153 806051 1329751 2048 256 41835 65433 841753 1450315 2048 512 35390 69287 1229450 378831 4096 4 5988 15355 314933 379365 4096 8 12776 13101 234339 585049 4096 16 17133 22522 639803 558426 4096 32 30108 46568 526073 579426 4096 64 33177 47131 513156 471342 4096 128 39880 46102 1635118 749924 4096 256 44561 57266 1729783 855835 4096 512 31474 82829 623072 1518755 8192 4 6272 7738 359363 193281 8192 8 10919 11980 369611 530531 8192 16 17602 18852 485363 260417 8192 32 18605 20748 907000 434659 8192 64 20016 2870 473334 522487 8192 128 22924 24613 478589 399569 8192 256 27521 34140 555463 425250 8192 512 32931 31501 452621 428138 16384 4 5081 5602 297361 235169 16384 8 8872 11835 358856 449614 16384 16 10553 14370 744798 633196 16384 32 19604 21564 536968 394321 16384 64 22521 35665 502405 729476 16384 128 25611 44302 906292 967691 16384 256 28522 37933 508517 684662 16384 512 28937 38243 424105 536335 32768 4 6609 7472 233700 220966 32768 8 9513 10841 353965 294150 32768 16 16732 21229 438144 688041 32768 32 21116 29011 887872 454769 32768 64 29303 36581 666138 510986 32768 128 32398 38950 614392 574009 32768 256 30759 44046 1088092 849265 32768 512 34673 63396 1228374 487422 65536 4