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: Sun Nov 16 20:37:51 2025 Auto Mode Machine = Linux oleg329-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-oleg329-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 1987 7488 221516 228688 64 8 4405 24989 424198 313664 64 16 5494 44503 725882 566551 64 32 5171 64191 901377 969761 64 64 4330 79189 904414 1392258 128 4 2075 4165 30325 278343 128 8 7677 26208 443033 315286 128 16 8003 42538 677178 496272 128 32 6815 66183 776042 800337 128 64 6272 66281 1306873 1254941 128 128 9927 99295 1526043 1579934 256 4 7084 13703 285129 255725 256 8 12861 16321 300111 229588 256 16 13225 41344 587127 610842 256 32 6629 54735 123492 927393 256 64 16939 27049 1340826 679237 256 128 18670 100746 1398455 453858 256 256 10577 114595 1729594 1707589 512 4 5932 13670 330493 197146 512 8 11117 18687 139512 169029 512 16 19698 19929 581846 567695 512 32 18576 38507 775599 517240 512 64 10568 58148 1103647 827289 512 128 26448 82605 265422 997991 512 256 7937 64580 1163439 1293037 512 512 23528 99860 1347393 2024389 1024 4 11497 6415 122738 109320 1024 8 18986 24476 216624 440247 1024 16 17395 49919 450735 546447 1024 32 32406 47870 1020956 668809 1024 64 32393 68517 1016847 880331 1024 128 20437 82288 1060013 1084640 1024 256 30819 39636 1349428 1242826 1024 512 42228 74683 1262555 1444266 2048 4 8367 9771 171511 177809 2048 8 19334 17626 356787 178133 2048 16 19880 30289 547310 418718 2048 32 40017 50534 809545 638998 2048 64 23080 40752 496246 619103 2048 128 47681 63934 1196235 1071223 2048 256 29168 43747 1417292 1185995 2048 512 48759 88643 357723 1605053 4096 4 12459 13998 220903 88327 4096 8 11178 12200 409436 372909 4096 16 26454 38408 737086 307371 4096 32 28328 32738 673118 604397 4096 64 51956 52560 548250 1168634 4096 128 33553 44739 1414352 396591 4096 256 56412 92489 261224 1195886 4096 512 41996 69386 1081596 985321 8192 4 6434 8688 156285 69265 8192 8 15663 14042 374800 277845 8192 16 18814 22852 334558 535491 8192 32 32426 23403 375316 398153 8192 64 32331 50022 728179 728812 8192 128 37769 38569 1201523 439485 8192 256 24942 59298 1541016 301854 8192 512 48489 66009 691832 1026067 16384 4 7790 8112 109885 128298 16384 8 11177 12801 260662 249379 16384 16 15680 20258 470234 608935 16384 32 36814 33288 1136200 664663 16384 64 27420 45677 805000 399853 16384 128 40926 59386 1003617 545242 16384 256 34714 47907 576313 612441 16384 512 38748 52312 1104125 1048099 32768 4 7739 9091 154260 107437 32768 8 14211 14958 343938 160961 32768 16 23925 23648 634854 287882 32768 32 25035 37718 392440 560760 32768 64 42039 68473 864114 669076 32768 128 34260 48713 561587 533654 32768 256 35332 46145 1136556 1024197 32768 512 46096 70324 1514315 873328 65536 4