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: Wed Aug 12 09:42:30 2026 Auto Mode Machine = Linux oleg216-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-oleg216-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 10843 23485 952555 586352 64 8 13695 34349 1526887 1484662 64 16 14705 43012 1421755 955947 64 32 15274 87075 1562436 1183548 64 64 20019 117435 2133730 3588436 128 4 12308 23992 870405 1185654 128 8 19044 28007 1732927 1579934 128 16 27936 53602 1123617 1359835 128 32 26867 74848 2326073 1802755 128 64 29310 82521 1622919 1642783 128 128 31105 99148 1663139 1885042 256 4 16395 22996 1235882 1158540 256 8 20283 29038 1766587 1453348 256 16 32757 55112 1540948 1292410 256 32 24900 69078 1523457 1447470 256 64 44123 126608 2441400 1362952 256 128 54458 186322 2533571 1814348 256 256 62866 197531 2754556 3557725 512 4 14851 21978 683736 608903 512 8 25176 42171 1344020 821592 512 16 48956 62869 2532990 2055390 512 32 61919 104705 2178404 2198475 512 64 70776 120126 2449212 1347393 512 128 85346 184907 1902438 2708713 512 256 60987 186530 2926501 3140488 512 512 92768 221166 2695115 3279573 1024 4 19601 24466 724179 979958 1024 8 33545 30277 1605111 1265904 1024 16 34366 50408 1712639 1082454 1024 32 60752 83137 2627203 2276316 1024 64 92502 157487 2859868 2331932 1024 128 95051 192661 3149251 2737730 1024 256 102055 128258 2578312 1988589 1024 512 70728 126624 1976691 3003881 2048 4 23194 25592 1170959 1014782 2048 8 36121 45117 1106978 1496033 2048 16 45393 50552 2064488 1085299 2048 32 55569 103776 2512554 1343057 2048 64 85780 155753 2507420 1350023 2048 128 114618 182956 2550602 2228370 2048 256 115699 120669 1841829 1771922 2048 512 120159 191565 2068963 2311728 4096 4 17022 22029 1170944 950802 4096 8 37758 37420 1478244 1436227 4096 16 56932 71894 1817243 1889391 4096 32 87545 71683 2324806 2249320 4096 64 88086 147523 2274332 2262949 4096 128 117465 135840 2560030 2209116 4096 256 139500 202121 2448388 2026691 4096 512 146688 142010 2493158 1726133 8192 4 20062 21334 708100 574272 8192 8 32797 34380 1064038 1472593 8192 16 47733 67360 1668126 1007740 8192 32 72263 99896 1615423 1518742 8192 64 81380 136902 2453424 1568164 8192 128 107719 154659 2246350 1738958 8192 256 111019 122755 1703185 1439464 8192 512 107630 152573 1688372 1632229 16384 4 19590 22752 1113717 682154 16384 8 34135 33188 1613254 1231227 16384 16 51301 62864 1254421 1778141 16384 32 69320 93031 2014772 1841762 16384 64 80231 115228 2040558 1312597 16384 128 103807 114595 2143076 1837821 16384 256 118498 153543 1995582 2272709 16384 512 122184 155155 1894308 2134688 32768 4 19980 20939 979937 868510 32768 8 33622 36639 1466926 1476444 32768 16 55184 56083 1535805 1443522 32768 32 71545 88063 1759177 1815794 32768 64 86010 112604 1910020 2019503 32768 128 101446 130954 2359272 1520194 32768 256 101266 145778 2448504 1501953 32768 512 103486 164118 2501946 2213301 65536 4 18441 19858 903321 674251 65536 8 32174 34654 1251499 857386 65536 16 46331 61795 1265419 1614945 65536 32 70714 97264 1974927 1691693 65536 64 94674 114736 2177926 1390422 65536 128 99208 131628 2227358 1896797 65536 256 118977 171107 2256208 1792068 65536 512