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 09:34:22 2026 Auto Mode Machine = Linux oleg241-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-oleg241-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 2292 8483 532815 289635 64 8 3995 14240 821391 402569 64 16 4934 20082 852702 752329 64 32 4735 33864 1226821 942521 64 64 5852 65031 942521 429630 128 4 6334 8660 590094 643108 128 8 9567 12992 301815 488594 128 16 6031 33844 280671 914904 128 32 10510 47604 217373 1102844 128 64 6646 83927 1231904 1152564 128 128 7091 60439 1579934 1778862 256 4 6594 8266 566377 42533 256 8 9078 20152 856386 362651 256 16 8926 34307 999940 898674 256 32 10844 39837 1262029 1103757 256 64 10940 90719 377041 1415041 256 128 18063 76462 1040643 1391207 256 256 19246 75250 1817419 1561112 512 4 4584 5099 455863 545211 512 8 8525 11717 937435 507462 512 16 13252 21225 1036527 996139 512 32 9985 32569 222426 844865 512 64 25153 94745 1441452 650396 512 128 24914 65398 1585086 483906 512 256 23619 72367 1778004 1655979 512 512 23599 88780 1718254 1968713 1024 4 7635 12320 296638 246443 1024 8 14237 15786 381103 781641 1024 16 21946 33268 994020 541828 1024 32 25203 46205 1273410 826462 1024 64 31724 54145 821090 456532 1024 128 36536 48283 1402756 837420 1024 256 31568 80896 1659694 1007072 1024 512 33024 59924 179872 1681132 2048 4 6240 8167 181802 250582 2048 8 14347 15314 355443 424638 2048 16 8903 22966 659151 547310 2048 32 40134 44074 871826 657235 2048 64 39304 52000 660215 1086535 2048 128 44125 75829 1361794 1369829 2048 256 31898 95255 1514764 1152422 2048 512 51577 68460 1377076 501227 4096 4 8197 8442 354605 397242 4096 8 13668 11523 348413 350475 4096 16 25087 25029 352712 445261 4096 32 20590 51859 496301 780342 4096 64 25798 35295 677017 650043 4096 128 24372 33366 1708792 302554 4096 256 53543 90963 730504 1408554 4096 512 38473 61126 1154188 795629 8192 4 8028 6831 123548 123408 8192 8 9952 23604 473471 360770 8192 16 17652 26512 775023 434840 8192 32 19463 24611 897547 729338 8192 64 20097 39225 705121 692641 8192 128 27585 44959 898627 749970 8192 256 39274 40840 1011985 870929 8192 512 43143 49680 971634 1070136 16384 4 3492 7266 351158 376921 16384 8 8920 10856 568531 416588 16384 16 12412 15329 777380 434955 16384 32 21658 27044 365329 486014 16384 64 20735 29941 798870 588972 16384 128 24744 29688 357448 612234 16384 256 34388 53839 1019156 858555 16384 512 40050 42778 365191 453549 32768 4 6145 6735 374234 364562 32768 8 12039 10526 504069 356186 32768 16 15622 17588 472658 641013 32768 32 25846 29475 531759 532303 32768 64 31537 37275 1425806 1500019 32768 128 30894 81036 817992 533056 32768 256 41166 53476 1080955 665812 32768 512 46618 59001 1258900 413387 65536 4