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 4 12:55:29 2026 Auto Mode Machine = Linux oleg644-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-oleg644-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 4437 6512 378715 470274 64 8 6055 20493 727850 587635 64 16 5862 7390 183381 789967 64 32 3145 54606 1232453 801764 64 64 4201 64206 735831 852702 128 4 1219 2167 554157 581781 128 8 5077 13489 847059 819893 128 16 6676 41011 1220700 948860 128 32 13694 54329 1196221 175803 128 64 9585 76468 1391557 1332828 128 128 16671 116766 653282 2004703 256 4 7865 4391 587127 346501 256 8 11506 15213 807442 727563 256 16 6100 18431 962301 709299 256 32 16756 19954 1391207 1112909 256 64 12803 16182 1340826 1292410 256 128 20875 132302 1108314 1369908 256 256 11658 89509 383232 293949 512 4 8698 9252 329935 243926 512 8 4682 9301 517739 349479 512 16 4739 24941 1077618 816283 512 32 27216 24084 1036527 1041049 512 64 36856 72870 1413929 195959 512 128 7146 34662 1476130 1137555 512 256 25878 89119 1600443 622133 512 512 22734 118189 1418599 864942 1024 4 7388 6075 368483 292059 1024 8 14853 13574 357443 193975 1024 16 15588 32932 1108434 544990 1024 32 20007 54595 1205839 313918 1024 64 32365 20198 1316341 204963 1024 128 22882 50311 284929 941918 1024 256 25593 39396 679927 315578 1024 512 36719 68230 1126458 392959 2048 4 5675 7432 156923 208317 2048 8 6603 9288 851516 249180 2048 16 17167 23106 506189 886583 2048 32 14372 30974 357782 335036 2048 64 15325 44335 747158 738550 2048 128 24446 34387 1476490 622107 2048 256 36861 73902 1276022 660824 2048 512 26403 34521 519914 754906 4096 4 6292 7631 229776 303071 4096 8 12975 15765 522187 342591 4096 16 16342 19728 1027884 316098 4096 32 22789 32420 871287 741092 4096 64 26888 33975 943596 881615 4096 128 24091 36454 1135948 286193 4096 256 25910 60705 708161 525060 4096 512 36241 35715 1817051 732998 8192 4 9533 9250 254703 274025 8192 8 12033 11124 279809 492070 8192 16 16048 17988 371353 271025 8192 32 17756 17437 868617 612256 8192 64 20156 39804 810202 796732 8192 128 21863 49363 681013 801396 8192 256 29769 40782 697379 810604 8192 512 37182 37145 601075 658146 16384 4 6657 8055 228374 253492 16384 8 11046 11015 219256 355525 16384 16 19745 26640 443818 425060 16384 32 20962 62812 325130 258716 16384 64 26671 47014 1053013 1117357 16384 128 33044 49849 724829 651994 16384 256 43937 43968 827598 684437 16384 512 23432 43558 478925 372389 32768 4 4693 8440 554355 448145 32768 8 11414 18984 554366 322462 32768 16 16454 16187 456753 360084 32768 32 25241 33748 804264 1114257 32768 64