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: Tue Aug 4 18:19:11 2026 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 2013 4825 727850 653436 64 8 2412 10228 811459 752329 64 16 3755 13834 1119387 420873 64 32 3077 61598 1101022 1163036 64 64 1647 19359 1553394 1599680 128 4 1971 2682 556454 613002 128 8 1894 3117 743788 88580 128 16 4582 14168 1111981 412721 128 32 3852 20097 1229084 477725 128 64 4540 73435 955616 455436 128 128 4349 36802 1539168 1603529 256 4 1961 3128 260945 555248 256 8 2493 13244 366739 166013 256 16 13523 29913 219005 831194 256 32 4820 15339 1142514 1071806 256 64 17981 37036 787312 1325925 256 128 6426 27391 1532153 1361224 256 256 10786 46749 1463250 1662639 512 4 2115 3612 94048 231041 512 8 4701 8790 863551 303883 512 16 8060 15027 1213400 955368 512 32 11680 48338 982917 755144 512 64 13613 42960 780390 724081 512 128 14236 35457 993834 1333173 512 256 15015 32407 299225 1475116 512 512 18371 36376 1770674 169643 1024 4 3353 2859 581831 330310 1024 8 4606 6220 854073 429161 1024 16 5905 14728 641154 890369 1024 32 30243 35868 979958 392169 1024 64 15130 25559 759659 533880 1024 128 13905 21700 1051449 253020 1024 256 15844 34634 1111877 1094034 1024 512 29509 31345 317609 123504 2048 4 2805 4847 743923 281823 2048 8 7282 9637 581154 189913 2048 16 15354 9009 429350 295696 2048 32 9068 10830 294036 1187963 2048 64 18788 18361 244652 728034 2048 128 17753 18901 302816 667293 2048 256 13953 25839 1793378 1556202 2048 512 18139 46742 1782585 1647536 4096 4 2882 3280 97116 120691 4096 8 6205 7291 214494 95497 4096 16 7562 8539 256704 241223 4096 32 7886 16259 339578 255072 4096 64 19253 13918 369739 454195 4096 128 13807 19200 254219 258539 4096 256 8370 53308 493549 364190 4096 512 17721 25919 471769 519142 8192 4 2468 2482 141168 130470 8192 8 6936 11525 168767 192373 8192 16 6894 7448 254845 182478 8192 32 11502 14904 417428 246243 8192 64 18456 23898 420813 430455 8192 128 18982 25615 386087 248852 8192 256 20742 31196 579385 390447 8192 512 20207 35210 554978 533952 16384 4