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 May 13 02:13:18 2026 Auto Mode Machine = Linux oleg352-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-oleg352-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 4663 14327 83111 265565 64 8 5768 12989 866463 679917 64 16 5829 35512 1049372 831569 64 32 5426 45747 1210227 1066042 64 64 5392 83969 1304314 1933893 128 4 5132 10006 460514 576780 128 8 6056 20502 927549 955616 128 16 8975 41397 785122 620799 128 32 12170 75468 222971 1185654 128 64 12440 90583 1319723 1939522 128 128 17706 94606 1504659 1939522 256 4 7335 12313 406904 362040 256 8 10052 11646 852984 750445 256 16 13499 41843 1206714 426628 256 32 10883 35232 1219045 1345868 256 64 18997 94737 1219045 1248819 256 128 20621 117108 566377 1422540 256 256 25482 114485 2097948 2000242 512 4 8707 8803 629796 193070 512 8 5885 13638 582478 461645 512 16 20052 45840 748563 1043072 512 32 21858 47836 973559 662230 512 64 29026 70806 784094 1741948 512 128 19801 89587 1210664 180085 512 256 32110 138979 1672748 249625 512 512 36168 88564 501419 2178404 1024 4 11737 15133 308528 182533 1024 8 17037 25809 557729 548750 1024 16 17965 35635 1058967 415221 1024 32 28121 35108 495165 1099918 1024 64 28479 64553 1013010 417116 1024 128 42999 75172 1625154 1284839 1024 256 38454 64342 1490373 728725 1024 512 48099 143736 481887 1095150 2048 4 11438 10257 437975 283498 2048 8 18586 16176 968337 324309 2048 16 20735 21256 1107691 946465 2048 32 35525 31726 939837 863413 2048 64 34229 90969 384306 449715 2048 128 38953 70496 1207501 749113 2048 256 48713 91633 1756702 655579 2048 512 60523 104330 1760663 1422220 4096 4 11635 16397 253293 495814 4096 8 18253 20125 572952 375846 4096 16 30324 34532 969474 854048 4096 32 35256 57791 1326036 912085 4096 64 42049 65590 690736 1250281 4096 128 46945 73483 1576018 523715 4096 256 50873 81457 995368 1031216 4096 512 50351 82834 1468012 1335935 8192 4 12471 11120 523817 493881 8192 8 19240 19947 865859 766824 8192 16 26144 28525 416831 335077 8192 32 31658 50559 910413 823563 8192 64 53093 61509 768694 1020673 8192 128 43851 63223 1114099 517467 8192 256 62744 85838 1406352 1398453 8192 512 68495 92530 1214004 1006383 16384 4 3988 14199 434010 420717 16384 8 19553 23610 536951 563839 16384 16 29208 41908 828396 655121 16384 32 41430 57135 729476 878397 16384 64 59730 63032 1096060 1097618 16384 128 51005 85815 919634 621902 16384 256 64875 91976 736884 855072 16384 512 60819 110974 1153711 976520 32768 4 12865 13988 544472 500122 32768 8 22587 21053 658548 649013 32768 16 30517 31420 1123686 685810 32768 32 47102 58185 876754 1053965 32768 64 50139 69363 1113345 911387 32768 128 51079 83217 1454614 1261755 32768 256 69688 90942 783941 1062068 32768 512 79069 108692 1014236 1099742 65536 4 12926 12927 469126 506962 65536 8 20417 22469 746567 771366 65536 16 31701 41474 1055992 637634 65536 32 43840 52925 1199042 868487 65536 64 50541 70694 1026457 843644 65536 128