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 08:08:24 2026 Auto Mode Machine = Linux oleg206-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-oleg206-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 2986 8553 653436 548044 64 8 6154 28998 727850 515423 64 16 5543 27255 394870 998622 64 32 7444 73892 67364 1083249 64 64 7913 69492 1204796 2298136 128 4 6548 9395 540217 371073 128 8 5108 44882 934004 753179 128 16 11708 28169 670413 289604 128 32 9871 75511 1111981 990891 128 64 7103 78194 455436 1152564 128 128 8217 66876 1359835 1306873 256 4 7732 4572 519266 556398 256 8 13077 13988 109033 335145 256 16 13443 53781 1332507 468922 256 32 6510 52629 176173 996229 256 64 14946 38350 1306564 1298662 256 128 12785 67472 1540948 508929 256 256 24511 91625 1600674 2187712 512 4 5709 8304 663252 313327 512 8 9854 14063 175766 450318 512 16 20113 45377 635198 960926 512 32 21898 46084 1005938 778128 512 64 23881 75784 1387437 638408 512 128 32808 91441 1299295 555938 512 256 34925 108706 1323315 551088 512 512 26651 66796 120073 2178404 1024 4 6879 8447 127747 533350 1024 8 14887 25403 782781 173767 1024 16 24501 42511 933322 793189 1024 32 19899 37627 1253344 222608 1024 64 22233 36438 209237 1105865 1024 128 21221 75766 1378002 1244266 1024 256 31255 85233 1126753 957884 1024 512 38340 93678 2004366 2094282 2048 4 8832 7745 406339 446397 2048 8 16061 11046 1009772 498782 2048 16 18507 16471 1110125 552912 2048 32 37218 39011 457841 744180 2048 64 24468 93936 1667687 552449 2048 128 68055 66569 394001 1219675 2048 256 49836 76435 1599971 1389551 2048 512 40788 56443 2418469 2142232 4096 4 7913 6489 352286 180687 4096 8 13755 10182 292548 602447 4096 16 12835 22539 472054 560174 4096 32 20222 35048 622485 648081 4096 64 34210 53789 675367 267383 4096 128 43638 56009 883338 566304 4096 256 56010 36166 990319 1260740 4096 512 33750 70379 1706755 1981803 8192 4 5712 2390 431477 431498 8192 8 9861 13266 419456 156775 8192 16 18303 16608 627554 489191 8192 32 28570 37463 974888 626204 8192 64 29172 36633 1065127 936110 8192 128 38832 46786 1186422 865772 8192 256 31113 62513 956221 803383 8192 512 28194 37457 631081 289306 16384 4 4988 7116 284336 245118 16384 8 9091 10946 750427 435988 16384 16 17903 24696 413040 411792 16384 32 15888 18258 717091 423043 16384 64 18504 30078 602042 427134 16384 128 21523 37965 703777 722839 16384 256 33795 53992 834594 683151 16384 512 37225 62447 677554 537127 32768 4 6491 6733 349962 351421 32768 8 14692 14972 406697 302793 32768 16 16464 20131 673823 685293 32768 32 28519 33546 1182404 897063 32768 64 35402 47319 1129346 847265 32768 128 43939 65108 467653 779875 32768 256