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: Mon Jan 12 15:29:13 2026 Auto Mode Machine = Linux oleg243-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-oleg243-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 1779 4925 229470 102074 64 8 4575 1288 409946 353760 64 16 3124 32905 190541 546928 64 32 4700 48333 228493 598110 64 64 2857 38343 236131 901377 128 4 1983 3252 142224 244275 128 8 3076 7788 417212 395104 128 16 4753 52393 595328 565838 128 32 12083 52738 847059 276337 128 64 10491 26999 1114289 1133103 128 128 7215 14857 1294270 1802755 256 4 5002 4934 125984 242445 256 8 8950 8294 242226 145359 256 16 4008 19730 567575 548161 256 32 8654 49844 822913 864661 256 64 8006 110731 522551 1254656 256 128 25291 123492 148762 237721 256 256 16053 117763 1707589 1447470 512 4 3297 4648 120046 77966 512 8 14496 13910 162432 78395 512 16 9981 24877 553502 517739 512 32 10093 19222 432802 718028 512 64 14080 82065 1038532 632952 512 128 32262 38682 1358474 857345 512 256 29718 104318 1344020 1182661 512 512 17950 207791 1073309 795127 1024 4 8526 5901 41529 69058 1024 8 7982 9760 235678 360806 1024 16 15374 16880 209973 567606 1024 32 14588 29863 786507 380934 1024 64 20439 49159 724790 486913 1024 128 29687 33434 868581 947320 1024 256 39627 77207 550862 515119 1024 512 34588 55065 1084640 678637 2048 4 4900 5687 49077 69766 2048 8 10494 12034 201458 106812 2048 16 9766 24741 216579 309137 2048 32 20814 24046 384667 546996 2048 64 21928 34279 585472 316238 2048 128 26246 44569 1261962 502811 2048 256 54303 67494 365703 539372 2048 512 19546 51360 1371579 1745990 4096 4 7887 6837 165763 151456 4096 8 13884 19858 251043 361492 4096 16 16675 17375 219706 176383 4096 32 21595 30490 419411 659045 4096 64 21763 32271 898209 821499 4096 128 23845 41434 302335 419289 4096 256 31571 50445 977083 612433 4096 512 45483 41555 1016090 764167 8192 4 7478 7983 207618 118843 8192 8 9448 11624 241062 85352 8192 16 16106 13257 477584 320765 8192 32 20637 34437 279238 464290 8192 64 33057 30381 723472 467042 8192 128 30431 60177 943461 761471 8192 256 36547 62668 513385 513216 8192 512 37844 68649 843394 376071 16384 4 4945 7622 130598 123270 16384 8 10520 11345 149998 161609 16384 16 15737 17599 208098 266203 16384 32 21620 32335 479751 565295 16384 64 28951 32254 688111 607492 16384 128 30815 45420 995980 762466 16384 256 43363 59072 1181502 653557 16384 512 45482 65537 835883 635703 32768 4 8199 8626 217876 155504 32768 8 12563 9834 77009 99256 32768 16