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 28 00:55:29 2026 Auto Mode Machine = Linux oleg632-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-oleg632-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 1576 6923 165414 546928 64 8 3965 8050 392561 763021 64 16 5125 14807 983980 481234 64 32 4320 32467 1163036 561808 64 64 2267 70109 1492919 955947 128 4 2394 3676 627328 347758 128 8 4146 15121 876086 271173 128 16 8330 20768 656477 540217 128 32 5261 22606 1038825 881842 128 64 5260 15236 94539 1133103 128 128 7743 63869 1451764 1359835 256 4 8734 4636 280657 509895 256 8 6616 13939 269188 721210 256 16 12784 35491 969251 853662 256 32 16017 26085 1173737 817898 256 64 25179 81866 963164 571198 256 128 17082 63147 904732 952062 256 256 23146 41981 1588832 1752173 512 4 4595 5551 591136 373488 512 8 12955 22335 866338 678980 512 16 19434 23089 690108 790153 512 32 20163 57592 950295 934580 512 64 8657 19063 434290 1125040 512 128 38266 46831 960496 671129 512 256 21179 32707 1614885 1276891 512 512 18765 76611 1479181 1289930 1024 4 4940 4710 525133 358158 1024 8 6873 11784 215310 509981 1024 16 13339 28270 1014685 236392 1024 32 37137 47674 1183902 499484 1024 64 31191 52507 717046 234226 1024 128 35856 64622 1259592 446378 1024 256 26875 42400 1422266 571381 1024 512 44575 87029 1809317 427410 2048 4 5233 6281 250948 314053 2048 8 9525 10961 913938 373511 2048 16 7929 19202 583840 902986 2048 32 28539 17568 1154591 299063 2048 64 15447 47946 1313685 736966 2048 128 26621 34289 410926 377367 2048 256 23186 37216 843489 407553 2048 512 31678 52626 1070022 1394061 4096 4 5408 5417 307069 282388 4096 8 13790 12530 227491 425952 4096 16 13201 14442 684953 303141 4096 32 17409 23642 1050255 269383 4096 64 26871 43758 1519830 389647 4096 128 14596 55029 853496 447406 4096 256 39397 41472 484502 447651 4096 512 22352 38977 786055 471899 8192 4 7278 5690 132399 380477 8192 8 9686 14220 412631 239322 8192 16 13532 22602 688050 576584 8192 32 22653 21670 469614 239699 8192 64 19013 21022 376125 543453 8192 128 16497 33417 608343 399551 8192 256 22985 36211 286776 355662 8192 512 27296 38817 489749 522082 16384 4 5588 5623 233926 202837 16384 8 7714 8438 345917 301031 16384 16 19334 22451 1277508 427969 16384 32 26619 23023 687711 581344 16384 64 23850 41693 892138 541457 16384 128 36132 50680 1221054 815982 16384 256 26037 42597 1063969 741591 16384 512 30832 50235 1047508 875766 32768 4 4646 5232 194575 192450 32768 8