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 Jul 1 13:48:30 2026 Auto Mode Machine = Linux oleg460-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-oleg460-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 10445 17688 1033216 566551 64 8 14835 35773 1002351 1255511 64 16 11691 49647 1279447 842003 64 32 15729 63931 2561267 1452528 64 64 15677 99207 983980 2298136 128 4 12326 15672 940549 604036 128 8 17405 40583 1749872 703810 128 16 20785 50453 990891 1000121 128 32 25473 89630 2511022 816154 128 64 28881 91044 1684006 877518 128 128 28513 98313 2098744 2770150 256 4 12428 20361 1112909 608074 256 8 19990 30559 1178892 1137672 256 16 23557 52342 1619994 844929 256 32 36143 79851 2305128 1376935 256 64 40621 104706 1952947 1463250 256 128 37674 165145 2000242 1487577 256 256 52990 130011 2325094 2943325 512 4 19398 18260 881269 541227 512 8 21864 35051 932550 802555 512 16 36155 45808 1570020 1252318 512 32 40248 79628 1961520 1422357 512 64 62698 92437 2497638 1916017 512 128 53283 130515 2081286 1736314 512 256 58016 151574 2116152 1662389 512 512 66064 157882 1917728 1571169 1024 4 14846 18358 893517 600543 1024 8 24459 35006 1186518 1105865 1024 16 33162 48713 1309518 1163693 1024 32 55288 80585 1724328 1013727 1024 64 66222 92011 2290886 1203474 1024 128 72960 112936 1988589 1577984 1024 256 83224 150390 2060128 1947119 1024 512 71583 142776 1712639 1861867 2048 4 16489 18315 711098 685888 2048 8 27137 31237 887407 657033 2048 16 38711 51528 1040094 1056727 2048 32 57712 70919 1267362 1135813 2048 64 75975 114502 1521741 1408461 2048 128 73605 125681 1682715 1291174 2048 256 78839 185994 2319218 1635926 2048 512 89326 152482 1799766 1604753 4096 4 17050 16605 806801 748388 4096 8 29378 30697 1104047 903024 4096 16 41330 53617 1127154 1059517 4096 32 63036 76264 1481814 1649087 4096 64 89016 110371 1748087 1237492 4096 128 80118 136702 1992144 1658319 4096 256 89592 134027 1980661 1378159 4096 512 85413 141051 1676607 1589432 8192 4 16610 16649 782721 711782 8192 8 28840 29410 1073513 806135 8192 16 43822 52516 1732644 1415856 8192 32 60677 85012 2146168 1619611 8192 64 88678 105259 1486996 1323829 8192 128 99240 124136 1501487 1526909 8192 256 107269 111483 1640019 1384535 8192 512 108507 167371 2051596 1931645 16384 4 16149 17488 914847 636546 16384 8 30140 31019 1190260 1220057 16384 16 46931 56176 1381329 1038799 16384 32 66317 80253 1866271 1404909 16384 64 79207 111056 2299171 1848152 16384 128 97336 120858 2183663 1824065 16384 256 106899 158795 2031449 1988134 16384 512 100277 153701 1735787 1884956 32768 4 17600 18316 819445 674527 32768 8 28883 31522 1294556 1013645 32768 16 43459 51446 1781155 1553512 32768 32 65319 79378 1736682 1535153 32768 64 81188 94488 1500510 1297379 32768 128 95596 124781 2286807 1651180 32768 256 92948 121914 1774509 1764847 32768 512 101126 136549 2268912 1708445 65536 4 17617 19214 839322 815052 65536 8