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 Apr 24 11:17:21 2026 Auto Mode Machine = Linux oleg342-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-oleg342-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 8477 22520 608965 901377 64 8 11355 27837 901377 1392258 64 16 18709 44882 1232453 2006158 64 32 16504 107943 2203800 1599680 64 64 18448 105941 1879725 1828508 128 4 15115 22118 1332828 800337 128 8 21643 38530 774922 847059 128 16 26595 44725 1133103 1057236 128 32 29143 104311 1584598 1603529 128 64 31958 125121 2035099 1603529 128 128 34270 158612 2058509 3657016 256 4 16509 24565 663292 721210 256 8 26082 41734 1570244 861885 256 16 34390 63777 1581810 1430119 256 32 33394 111109 2975955 1683493 256 64 50049 122018 2030503 1384034 256 128 52544 160600 1356067 2872459 256 256 53591 178516 2463808 2880164 512 4 18641 22311 1034032 869143 512 8 25571 45817 1394645 1589779 512 16 46150 71518 1875849 1199171 512 32 53714 123045 2535981 1560891 512 64 62614 138979 1848401 1662389 512 128 70767 133261 1795846 1848401 512 256 73436 211996 2081286 2055390 512 512 74919 155200 1904125 2314583 1024 4 20200 20119 926676 604856 1024 8 36816 40885 919140 1281771 1024 16 54386 54853 1162433 1470977 1024 32 53053 103341 1395010 1464956 1024 64 68344 145223 2450338 2086145 1024 128 93926 138525 1838751 2201637 1024 256 80561 134101 2300703 2085132 1024 512 79496 177751 1858644 2085132 2048 4 22265 22322 806581 814612 2048 8 34886 32177 972063 1194904 2048 16 49151 63272 2054120 1016343 2048 32 74227 95419 1865023 1276022 2048 64 80665 125497 2027455 1725300 2048 128 77935 147254 2364545 2120026 2048 256 124567 168864 2104960 2135309 2048 512 112040 219104 2397544 2017455 4096 4 20493 23102 1099877 807256 4096 8 35081 38660 1338120 1184834 4096 16 49145 62485 1848330 1492758 4096 32 65848 94154 1457674 1208249 4096 64 87036 143356 1905105 1214742 4096 128 88386 140954 1864376 1449924 4096 256 92652 144434 2162674 1879675 4096 512 102253 147987 1818012 1784772 8192 4 16859 18524 650828 843746 8192 8 27738 32755 1069304 734248 8192 16 44799 54991 1252049 1261472 8192 32 56079 71122 1522376 1595396 8192 64 77324 103584 1431369 1449667 8192 128 78755 126168 1595396 1490285 8192 256 88167 131754 1699899 1537293 8192 512 101635 154534 1820884 1714916 16384 4 17283 19424 811809 667128 16384 8 29286 33473 940630 862456 16384 16 49785 57041 1514919 1234212 16384 32 77362 93886 1830820 1626042 16384 64 82356 102034 1627158 1432915 16384 128 94800 129046 2065024 1816591 16384 256 100997 158576 1756821 1647285 16384 512 112443 146929 1905127 2122556 32768 4 18510 19105 1129114 842559 32768 8 33218 35572 1110592 978444 32768 16 48669 53825 1471590 1176755 32768 32 66816 78875 1849515 1296559 32768 64 81656 99949 1929921 1436056 32768 128 96965 125241 1973030 1653046 32768 256 96238 138748 2120487 1762200 32768 512 119558 160089 2453793 1683087 65536 4 18568 18883 1034866 782181 65536 8 34383 37894 1226045 1193648 65536 16