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 Apr 10 10:49:55 2026 Auto Mode Machine = Linux oleg325-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-oleg325-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 2891 7446 546928 83137 64 8 3600 18459 109978 620221 64 16 8722 32684 955947 363829 64 32 5375 19126 214096 942521 64 64 6364 43213 1163036 1562436 128 4 6760 14479 699227 215109 128 8 6421 11441 137913 711270 128 16 8499 44661 1076312 753179 128 32 12547 26567 290859 1114289 128 64 11698 31794 1231904 1471662 128 128 15126 117123 1319723 3359523 256 4 6416 7195 334206 310347 256 8 7118 16689 569985 780445 256 16 19701 22131 984356 560172 256 32 16849 31928 1235882 695516 256 64 13541 98123 1254656 721210 256 128 15374 61448 1132871 1032636 256 256 11965 105003 1361224 1775350 512 4 11131 12409 472306 481735 512 8 11943 20189 501068 370204 512 16 21037 29105 966113 887461 512 32 28571 41101 1051757 111547 512 64 19756 45989 1395552 456735 512 128 23949 106910 1506154 992456 512 256 38985 84797 1650887 1350783 512 512 41700 150007 1471074 2265742 1024 4 10756 8603 461685 599202 1024 8 21038 15503 458971 363370 1024 16 31727 33035 290322 377851 1024 32 20391 47102 673635 759659 1024 64 40734 52071 1208894 285231 1024 128 27991 88214 872108 820463 1024 256 29556 127713 861957 1709231 1024 512 31312 55834 1066594 793775 2048 4 10763 12416 402041 306315 2048 8 21510 17657 757970 461978 2048 16 30446 26106 1021540 550537 2048 32 37807 45541 1218291 512134 2048 64 45121 100956 495045 639379 2048 128 38893 70286 1051424 958825 2048 256 47605 83018 664711 1128501 2048 512 50839 83703 1015382 1397918 4096 4 11265 15157 486919 365421 4096 8 20464 19987 651497 449725 4096 16 28261 30803 904165 603759 4096 32 33066 45568 1204353 889098 4096 64 44654 42540 1316182 1085354 4096 128 51757 57859 989634 824456 4096 256 46331 67480 1439235 1301130 4096 512 60309 58214 1691963 809347 8192 4 12225 12692 308746 407967 8192 8 22056 19653 643057 442456 8192 16 24806 39073 945174 598343 8192 32 38286 55263 1289886 440759 8192 64 44828 52594 1205951 591605 8192 128 48365 67042 771456 569163 8192 256 54833 90321 962516 1055540 8192 512 72727 106637 1452486 1409005 16384 4 4232 13044 662510 414335 16384 8 18581 20027 667666 591248 16384 16 30490 30998 1107167 544537 16384 32 38162 45262 607981 1037215 16384 64 48173 66517 1216794 1174997 16384 128 65766 81563 1250017 1239242 16384 256 64186 80359 851692 1132754 16384 512 58593 73183 1066446 871910 32768 4 12431 13575 574414 567538 32768 8 17966 22723 759466 691774 32768 16 32334 38116 737302 700262 32768 32 56143 58351 951287 990780 32768 64 51865 74965 1047275 678242 32768 128 57033 81306 798985 617121 32768 256 74478 102964 1412414 1044830 32768 512 65908 84659 1029182 1135373 65536 4 12004 12599 528482 455985 65536 8 21891 23214 644450 644412 65536 16 34020 39383 1060044 962731 65536 32 47640 67944 1230749 1026886 65536 64 63780 84908 1570068 1146032 65536 128