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 Sep 16 14:38:41 2026 Auto Mode Machine = Linux oleg436-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-oleg436-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 2163 7823 577521 342040 64 8 2428 17723 831569 735831 64 16 2827 28905 1049372 281731 64 32 4737 49684 1124074 1204796 64 64 6101 64920 1163036 1310683 128 4 2690 8120 313811 337695 128 8 5216 13981 298293 612303 128 16 6351 8466 864797 816154 128 32 12645 48012 448961 969421 128 64 4820 22816 506097 883293 128 128 8140 103467 1254941 2035099 256 4 5284 9549 613634 399486 256 8 4010 13869 411583 334623 256 16 12570 19671 947860 839644 256 32 13141 25422 612235 660030 256 64 11905 15619 1084800 448362 256 128 7699 123734 1298662 1629830 256 256 10511 114084 1660068 335564 512 4 4495 7097 595397 306223 512 8 5807 15405 647260 732478 512 16 17881 16994 548694 98995 512 32 20183 15041 470134 463738 512 64 23780 48697 1463057 312370 512 128 12189 75760 306048 1279935 512 256 13438 91804 1347393 973118 512 512 29857 65006 1555239 1933266 1024 4 3439 6255 147955 185041 1024 8 13671 19423 842678 224952 1024 16 11823 20178 133592 201331 1024 32 13060 36019 905575 550509 1024 64 28499 50801 1020956 868581 1024 128 29248 45927 143439 600963 1024 256 46972 61997 1219189 1338494 1024 512 24715 41050 929082 1412443 2048 4 5235 8473 372232 409926 2048 8 16469 12279 940764 225157 2048 16 17949 31252 1177057 1015382 2048 32 16910 33000 588520 1092894 2048 64 24276 26294 911804 638238 2048 128 36129 48492 1674514 668175 2048 256 28964 31404 396657 372700 2048 512 25605 54309 655579 286993 4096 4 10259 5288 154969 187976 4096 8 1520 18840 717597 417100 4096 16 22880 41637 1025063 509957 4096 32 38295 32247 432287 601476 4096 64 20072 30771 394560 271580 4096 128 49592 97556 227681 602869 4096 256 35311 37401 561786 388431 4096 512 27194 62830 1293683 661506 8192 4 6188 7200 299523 272558 8192 8 9303 9467 371907 262102 8192 16 18642 10606 427823 235294 8192 32 27041 25465 465637 499118 8192 64 21558 42039 510213 384527 8192 128 29061 46766 1015874 726501 8192 256 35678 42740 819849 765458 8192 512 51306 75928 1522106 706993 16384 4 6144 5514 298016 193344 16384 8 9230 11804 268797 322722 16384 16 13162 20023 464911 490629 16384 32 19446 26655 672133 263373 16384 64 17227 30513 465851 347391 16384 128 32945 34523 402120 699066 16384 256 31349 39822 726761 628488 16384 512 31258 104018 454554 408211 32768 4 6681 4744 222979 195998 32768 8