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: Sat Sep 5 03:44:29 2026 Auto Mode Machine = Linux oleg639-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-oleg639-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 3382 9904 96949 651849 64 8 4043 8715 983980 799377 64 16 5272 31069 1143223 852702 64 32 3899 42327 1336792 763021 64 64 3608 46988 1526887 1083249 128 4 2087 3034 653282 556454 128 8 3691 18178 831319 779422 128 16 7004 27508 1065630 1048974 128 32 6946 19900 1332828 748976 128 64 7200 43956 1421023 1278855 128 128 9884 47041 1254941 2211113 256 4 5120 13110 428843 253192 256 8 8353 19029 1175022 654399 256 16 8582 15405 494400 430218 256 32 4447 18687 1306564 612235 256 64 12276 66771 1354356 1384034 256 128 16790 31746 1471270 1639786 256 256 7876 43641 1683493 1642294 512 4 9403 8137 266509 176677 512 8 8842 10375 718990 523545 512 16 11023 30313 1158418 806171 512 32 18708 37066 1391933 1132755 512 64 17610 54433 764281 784094 512 128 23802 48798 1537424 977103 512 256 28550 87474 1723770 1707325 512 512 11371 43448 1772135 2304647 1024 4 7868 8961 626654 594310 1024 8 10469 14717 128835 269618 1024 16 20788 34841 989440 510224 1024 32 28945 43875 1342258 794510 1024 64 12991 42225 1492963 436311 1024 128 23276 41646 1008017 827737 1024 256 21869 36424 1047091 759659 1024 512 26831 65728 1787480 869989 2048 4 8405 8135 205871 237561 2048 8 9359 9921 358364 591031 2048 16 9208 9857 142956 189930 2048 32 18783 10887 1236708 969211 2048 64 23192 64252 1004928 343394 2048 128 40212 78751 847986 957009 2048 256 35348 49824 839696 1503627 2048 512 44762 59057 1833573 1132070 4096 4 7587 6273 227578 274496 4096 8 12556 10081 528029 285532 4096 16 12380 11730 600677 621742 4096 32 21436 38807 587570 517890 4096 64 39463 53914 703781 701969 4096 128 18020 49477 1641680 747022 4096 256 29502 34503 837437 316826 4096 512 45304 63907 562484 547080 8192 4 5318 5317 248558 305170 8192 8 6578 2382 373281 318099 8192 16 13158 17916 497507 441308 8192 32 20469 26827 426533 981768 8192 64 33045 45516 987467 501069 8192 128 34270 48545 1591627 691665 8192 256 45992 61491 1267334 804869 8192 512 31459 48189 1064467 1059347 16384 4 6523 6561 483120 130952 16384 8 9677 13393 533802 208211 16384 16 15071 20752 541030 464713 16384 32 16531 18846 660676 458665 16384 64 17447 30304 372235 302337 16384 128 28539 30339 1000971 846937 16384 256 38144 49370 1173812 831001 16384 512 32895 53755 1100483 1121423 32768 4 6734 6281 245523 241548 32768 8 7460 9782 354778 378474 32768 16 17638 15672 518424 405770 32768 32 18056 29309 670447 409907 32768 64 29860 38759 878570 600708 32768 128 30608 38037 509580 656002 32768 256