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: Sun Jun 7 00:56:49 2026 Auto Mode Machine = Linux oleg347-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-oleg347-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 9132 17287 725882 435909 64 8 12838 29573 889431 901377 64 16 15263 64314 1119387 955947 64 32 19548 70887 1330167 983980 64 64 22710 89753 1518251 1780008 128 4 15076 20401 643108 934004 128 8 23676 43974 877518 853794 128 16 27498 54235 1997245 1294270 128 32 33550 97936 1406136 2066432 128 64 30615 108858 1557024 2336194 128 128 31128 113173 1778862 2238774 256 4 15505 20098 1094754 575175 256 8 22026 34441 792543 711178 256 16 33225 64512 1118707 947860 256 32 43774 88063 1802167 1057034 256 64 45445 108702 1743637 1471270 256 128 47646 169632 2097948 1581810 256 256 55982 207614 1740810 2880164 512 4 16657 23090 648824 759685 512 8 30416 32874 1551867 934173 512 16 37328 76031 1129775 966113 512 32 46406 89932 1417662 1305615 512 64 63420 109143 1753325 1484293 512 128 83687 154541 1835760 1933266 512 256 92989 184764 2124526 2768068 512 512 94168 196695 1566585 2427068 1024 4 19110 20475 660682 835953 1024 8 29527 42285 921705 1108148 1024 16 52210 68198 1638796 995171 1024 32 74876 94515 1442326 1540074 1024 64 90435 162026 1903961 1199106 1024 128 90380 162228 1646334 1783768 1024 256 99795 186116 1995982 1519371 1024 512 105370 232892 2375790 2455943 2048 4 19183 20579 880133 589368 2048 8 34438 39056 1111849 957009 2048 16 48576 57729 1896314 1312080 2048 32 71563 94670 1820362 1204792 2048 64 84252 121154 2007554 1442279 2048 128 124294 134674 1514764 1259557 2048 256 90897 164012 2111687 1318727 2048 512 100225 168199 1762469 1832009 4096 4 16926 19908 685636 829993 4096 8 32114 36009 1010889 996581 4096 16 47104 58693 1728216 1327265 4096 32 76931 93122 1994225 1298671 4096 64 77826 108561 1534628 1552097 4096 128 97220 139191 2013626 1773166 4096 256 94845 135025 1551537 1663780 4096 512 110069 158525 2371663 1619549 8192 4 19334 19729 798677 637710 8192 8 31073 36057 872322 1025914 8192 16 45578 55708 1389911 1317433 8192 32 67655 90323 1701330 1339414 8192 64 82416 111643 1893640 1538050 8192 128 93995 124466 2012777 1455316 8192 256 101888 165518 1740015 1469130 8192 512 110750 164586 1969738 1580208 16384 4 17877 19711 860587 716710 16384 8 31539 34064 1056072 917509 16384 16 49756 61489 1543466 1232353 16384 32 71087 89679 1748729 1388361 16384 64 96485 122085 1992457 1582821 16384 128 104215 147239 1679574 1549173 16384 256 104806 153719 2051584 1683153 16384 512 114069 165531 2448599 1746329 32768 4 18601 19215 735483 713246 32768 8 31042 34129 1078605 949080 32768 16 48688 59417 1731387 1467176 32768 32 74663 86139 1803902 1610849 32768 64 90065 125347 2115981 1672763 32768 128 108242 152110 2067534 1427361 32768 256 109709 176286 2368175 1713001 32768 512 134615 194399 2167198 1766844 65536 4