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 Oct 7 02:59:45 2025 Auto Mode Machine = Linux oleg110-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-oleg110-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 8840 18212 246314 136205 64 8 10823 22377 394870 447537 64 16 15640 51200 639427 821391 64 32 14234 58779 1421755 703068 64 64 17062 85576 752329 230851 128 4 12836 19370 183119 163291 128 8 20836 41438 730629 383258 128 16 22346 56165 955616 1133103 128 32 26545 80504 1598754 876086 128 64 21687 60692 1749872 1162547 128 128 21955 111806 1363288 1346196 256 4 14067 17394 270340 212798 256 8 21482 27104 430218 541253 256 16 31820 54713 202714 421107 256 32 37284 84794 1298662 445202 256 64 44229 111885 1743637 941213 256 128 40069 121797 638445 1445521 256 256 30178 83933 1463250 1766587 512 4 14096 19056 285881 344766 512 8 26161 40550 744411 396009 512 16 47197 44028 829847 654559 512 32 39324 92072 713258 986529 512 64 43319 76111 1047141 969603 512 128 53172 91804 616242 1492545 512 256 72235 150407 1437592 1518938 512 512 71748 137300 2187279 2032051 1024 4 15847 16541 319499 305109 1024 8 26075 31979 833196 455757 1024 16 41605 49824 686776 641633 1024 32 58692 82084 1692394 980853 1024 64 77570 102841 1992279 1673273 1024 128 72153 103506 1950656 1692394 1024 256 63666 101798 1528563 1633188 1024 512 73069 144632 1753186 1558516 2048 4 15162 15419 278074 295138 2048 8 23188 25324 407244 348832 2048 16 41680 46287 595332 769651 2048 32 48209 59067 778157 835612 2048 64 66203 94625 1195569 857295 2048 128 65156 89662 877078 1516904 2048 256 66062 99417 1494992 1098624 2048 512 79454 140920 2124745 2027934 4096 4 14380 15911 310583 184597 4096 8 25384 30603 456282 386231 4096 16 38624 47671 670282 751137 4096 32 52272 65928 852268 875193 4096 64 67371 76728 893909 916953 4096 128 58327 105265 1346933 1047054 4096 256 68813 103350 1167919 1150863 4096 512 68053 110550 1495487 1518621 8192 4 14589 14916 267939 281413 8192 8 28490 29810 517662 429868 8192 16 41724 40271 678097 488169 8192 32 52194 64154 969469 850934 8192 64 56186 87586 1138878 856449 8192 128 79019 101193 1154142 1123902 8192 256 68187 107739 1540739 1166959 8192 512 85582 125028 1731509 1751546 16384 4 15004 16167 268943 271879 16384 8 26967 28092 500000 438321 16384 16 38835 45582 662919 669638 16384 32 55844 63036 930064 790962 16384 64 63949 85748 1189313 907345 16384 128 74281 87871 1508931 1331700 16384 256 77659 108546 1156488 1106490 16384 512 75831 116826 1422356 1459731 32768 4 15057 16287 261090 271615 32768 8 23502 28407 506155 377681 32768 16 38633 43313 628040 720712 32768 32 51322 65384 944293 672991 32768 64 63946 79927 1277102 926458 32768 128 77266 93060 1212734 1001254 32768 256 81719 107008 1252978 1163506 32768 512