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 Jun 30 20:40:31 2026 Auto Mode Machine = Linux oleg203-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-oleg203-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 11347 16953 496362 551422 64 8 15698 39361 842003 1143223 64 16 17191 63238 1013707 1183548 64 32 21746 64764 1255511 743988 64 64 21297 148159 1255511 3203069 128 4 14078 23498 581781 485063 128 8 23138 37636 718889 1057236 128 16 24502 63619 1206978 762811 128 32 32762 87784 1093856 985435 128 64 17897 81730 1684006 1123617 128 128 35446 132501 2132084 2673584 256 4 14343 19478 864661 711178 256 8 22681 31612 1011241 750970 256 16 36347 61392 1778290 1248819 256 32 34962 90231 1523457 937924 256 64 50314 123977 1523457 1048775 256 128 47698 154766 1778290 2170027 256 256 61434 143821 2266207 1826695 512 4 13779 16315 652174 442524 512 8 25312 26510 643960 712076 512 16 34674 54823 1014013 906568 512 32 44904 69803 1391933 857687 512 64 67950 138826 1463057 1143004 512 128 76737 162739 1630828 2256220 512 256 90394 135780 1861217 1280699 512 512 92337 229510 1506154 1909204 1024 4 15657 21475 868581 648120 1024 8 30439 36524 1067920 1056623 1024 16 40992 56929 1054547 1182598 1024 32 44409 72649 1499217 1623311 1024 64 85934 134681 1328146 1537317 1024 128 86173 160855 1467458 1224752 1024 256 81802 123882 1464956 1258117 1024 512 86305 147104 2081090 2225595 2048 4 18527 22032 727540 959790 2048 8 30125 38065 911031 723192 2048 16 43279 48402 1510236 1361578 2048 32 75594 86112 1264191 1722532 2048 64 90132 122876 1697009 1174321 2048 128 101783 119640 1937372 1452276 2048 256 92231 170314 1671907 1577928 2048 512 92448 158673 2285891 2193096 4096 4 16852 19322 922765 560009 4096 8 29621 34627 1050255 837274 4096 16 46362 52146 1456068 919653 4096 32 58401 87349 1841593 1794091 4096 64 75666 103248 1778490 1376834 4096 128 100760 142429 1741531 1748799 4096 256 118047 155717 1726133 1957863 4096 512 128505 199504 2115798 1956971 8192 4 17233 18471 488461 757760 8192 8 32653 37958 1203501 987099 8192 16 48854 62326 1826984 1149585 8192 32 74539 84986 2041843 1650894 8192 64 92056 123314 2126115 1841771 8192 128 112420 158293 2006313 1703523 8192 256 103151 155327 1483785 1924397 8192 512 136854 210863 2192175 1982009 16384 4 19162 18852 914688 682466 16384 8 35514 32091 829526 740888 16384 16 58320 64714 1233835 1615453 16384 32 81974 88831 1905127 1549312 16384 64 94489 96995 2014477 1605640 16384 128 111816 149564 1555203 1369901 16384 256 108924 159700 1426549 1774513 16384 512 109554 181018 2085264 1678672 32768 4 18299 21413 864908 773250 32768 8 33270 35626 1403400 872042 32768 16 48740 57110 1071591 1096504 32768 32 69653 90798 1745659 1038342 32768 64 91533 115561 1652112 1695985 32768 128 106884 148485 1455831 1470347 32768 256 117711 153055 1882446 1748947 32768 512 128889 177564 2072241 1481840 65536 4 18214 21296 775180 844523 65536 8 32811 35880 1247710 978600 65536 16 50274 57522 1371565 1486414 65536 32 70396 94145 1868128 1601639 65536 64