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 Aug 14 08:23:43 2026 Auto Mode Machine = Linux oleg653-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-oleg653-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 2742 4749 603489 323491 64 8 5711 29357 799377 566551 64 16 6356 20350 913649 633392 64 32 2242 15119 1279447 942521 64 64 5609 67432 1562436 1562436 128 4 4568 2881 601330 391360 128 8 7816 17876 841746 711270 128 16 5774 33008 1048974 948860 128 32 5311 26495 743788 857887 128 64 6067 52718 761728 895074 128 128 14942 77428 1440082 498114 256 4 5272 6042 587448 541253 256 8 11450 18605 934659 613634 256 16 5795 14854 1108314 346837 256 32 19012 38248 1306564 820398 256 64 22998 56385 1274008 1180188 256 128 15335 63917 1463250 1286217 256 256 20901 50804 1306564 1938842 512 4 8255 9345 332901 247582 512 8 8570 16908 700463 525082 512 16 5314 15345 332283 929322 512 32 22421 34903 1225169 759416 512 64 21859 36744 555220 396594 512 128 14220 58082 840566 780390 512 256 23386 67716 1570020 643381 512 512 19978 95986 716112 614654 1024 4 4417 5002 360291 96640 1024 8 8407 5587 833196 148062 1024 16 6214 29686 521119 542375 1024 32 9892 21633 890369 129456 1024 64 12799 38823 1029275 595299 1024 128 25238 33870 1575091 307226 1024 256 43892 53733 855433 1428415 1024 512 21833 82794 978172 263159 2048 4 4975 5872 315414 236488 2048 8 7783 6808 275082 305270 2048 16 10541 13033 482884 722644 2048 32 16238 28937 1268110 405304 2048 64 31958 42449 248000 569669 2048 128 12417 28213 764446 1028019 2048 256 19620 27934 1121576 1367213 2048 512 41265 64844 295178 417457 4096 4 5381 6346 275787 195419 4096 8 10617 8404 407436 185550 4096 16 11598 18394 363927 301064 4096 32 13297 21645 375575 310516 4096 64 25503 36186 778856 503265 4096 128 20285 29974 664937 409680 4096 256 24927 46168 457290 396243 4096 512 21658 42843 840387 275416 8192 4 4352 5347 280001 348346 8192 8 8844 10038 415540 303261 8192 16 12998 18696 448925 363104 8192 32 20103 22563 380595 420880 8192 64 31501 51498 723167 874564 8192 128 26522 48108 1032915 815762 8192 256 33561 49481 1063051 610885 8192 512 34690 52463 1131154 965003 16384 4 6057 6827 514333 226222 16384 8 9897 10874 670618 351580 16384 16 12968 14808 766575 506225 16384 32 17189 17206 857527 772000 16384 64 23128 39666 703021 725119 16384 128 23622 29191 699543 721700 16384 256 32046 50094 936822 453825 16384 512 33211 49161 641352 494225 32768 4 6319 5811 334825 181013 32768 8 9491 9049 382701 278343 32768 16