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: Tue Sep 8 01:19:14 2026 Auto Mode Machine = Linux oleg133-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-oleg133-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 3955 13817 457452 199906 64 8 1803 11931 727850 627470 64 16 3526 36803 863676 571375 64 32 6758 56491 1183548 987600 64 64 4671 31540 1183548 1357066 128 4 4726 5481 615814 695603 128 8 8048 13957 805138 319983 128 16 10608 37221 470606 848397 128 32 12699 52119 1229084 356533 128 64 15362 73951 1155043 1231904 128 128 5262 118310 1319723 33185 256 4 9064 7403 355096 257257 256 8 4302 21050 827989 524593 256 16 5976 10425 1148625 876662 256 32 11236 53367 1197295 958008 256 64 18078 69265 1044693 1422540 256 128 17538 92613 1391207 1332507 256 256 12689 41431 1132871 626159 512 4 9517 9040 311418 255871 512 8 13685 24621 578554 640121 512 16 6324 8020 652372 61866 512 32 20823 65953 1122687 636705 512 64 13063 42094 1391032 1017858 512 128 21763 46848 1547395 1036527 512 256 36602 86880 1492545 1089647 512 512 23222 74215 1662389 969603 1024 4 7250 12512 450309 286506 1024 8 15999 18092 344098 855604 1024 16 27727 19771 382359 106845 1024 32 23451 54202 882683 1034232 1024 64 39464 34316 790707 1117955 1024 128 13851 44192 1321200 902151 1024 256 28978 69910 1031252 908640 1024 512 44910 99823 1528019 1720874 2048 4 6851 6236 195791 193046 2048 8 14049 10400 513942 500001 2048 16 14757 16251 738296 878603 2048 32 32524 38558 661282 1054522 2048 64 26780 26668 842083 1118509 2048 128 30587 28252 1413328 467789 2048 256 33120 34789 1451540 1277730 2048 512 21724 52465 385478 272343 4096 4 5358 6634 130746 135288 4096 8 9709 12294 250765 132397 4096 16 16660 19382 1206467 564425 4096 32 20710 29986 1227764 570479 4096 64 30563 43304 1387509 654725 4096 128 51162 42002 1708113 858872 4096 256 33103 47523 972933 460119 4096 512 36359 43989 837641 1627990 8192 4 7472 7388 299512 266328 8192 8 14481 11519 222240 430250 8192 16 14941 18380 308408 549028 8192 32 20978 41049 803139 504031 8192 64 17091 59128 591829 808049 8192 128 27066 36978 970153 883628 8192 256 24274 37638 980255 678365 8192 512 31498 54651 803853 804078 16384 4 6059 6500 228881 163599 16384 8 8690 10116 196799 435849 16384 16 17340 20083 718914 591436 16384 32 19881 33300 1098565 832733 16384 64 23529 32227 499466 729112 16384 128 30054 44205 880050 716553 16384 256 34676 55160 969972 877567 16384 512 43426 57335 1043563 805830 32768 4 7792 5558 407708 225556 32768 8 9757 11411 279862 187552 32768 16 12217 17777 763147 382423 32768 32 20459 28901 961079 798906 32768 64