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 Jul 17 22:29:15 2026 Auto Mode Machine = Linux oleg324-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-oleg324-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 13565 22144 598110 998622 64 8 15190 36056 1087638 1049372 64 16 17410 70570 1183548 983980 64 32 26338 99207 1991276 1947927 64 64 25468 150907 2772930 1828508 128 4 15246 21053 688467 673778 128 8 18757 45006 1424795 699227 128 16 26353 70913 1975201 1040839 128 32 35566 82369 1406136 1111981 128 64 38668 109302 2286447 1827299 128 128 18856 115411 2453642 1487977 256 4 15792 21818 654798 530031 256 8 20777 31261 954602 646518 256 16 31904 62682 1561112 891956 256 32 36462 95880 2000242 1884399 256 64 51231 111792 1439707 1561112 256 128 57971 185903 1790149 1581810 256 256 58810 167541 1802167 2015259 512 4 16625 20234 605982 660600 512 8 28799 41150 758612 814117 512 16 28549 57677 2091421 1075459 512 32 44152 80349 1546280 1132755 512 64 53355 125241 1193838 1488408 512 128 64728 179964 1797349 1541840 512 256 48243 184304 1931527 1467055 512 512 62492 213238 2207515 2063289 1024 4 16152 22536 625923 567981 1024 8 29952 34838 939446 773895 1024 16 39297 57518 1309518 987619 1024 32 51392 81704 1756772 1234964 1024 64 69745 112219 1712639 1528019 1024 128 94594 183515 1486247 1530742 1024 256 94832 141650 2497356 2326879 1024 512 114695 201020 1729884 2710090 2048 4 17699 20753 764446 618167 2048 8 31548 41775 1353639 1068292 2048 16 53823 63101 1699696 1574169 2048 32 80559 92426 1861789 1540020 2048 64 81169 123256 1791508 1126577 2048 128 100886 159501 1640927 1574169 2048 256 95087 153178 1843410 1681397 2048 512 112602 180791 1937809 1659632 4096 4 18309 19153 681881 715088 4096 8 27709 35146 992493 1055935 4096 16 48487 59409 1618939 1212513 4096 32 65778 75510 1940393 1323890 4096 64 81688 117196 1254480 1588257 4096 128 105254 115644 1464384 1344719 4096 256 109653 150422 1925820 1458169 4096 512 111848 141568 2061467 1537512 8192 4 19323 19510 912565 727131 8192 8 31035 33902 1085176 919624 8192 16 49070 58159 1181932 1007120 8192 32 64112 86845 1870242 1519279 8192 64 91060 119514 1574776 1274196 8192 128 111637 151180 2020233 1594359 8192 256 110361 154388 1787818 1671453 8192 512 104532 168691 2227852 1643628 16384 4 18638 20865 837707 663214 16384 8 30515 35411 1106276 969808 16384 16 47747 59149 1377038 1276914 16384 32 72904 91329 1461687 1792940 16384 64 99465 119537 2356004 1987904 16384 128 120301 171878 2147027 1490538 16384 256 120245 166922 2262384 1691522 16384 512 113281 166436 2132502 1762679 32768 4 19629 20322 841434 820164 32768 8 31900 35736 1212862 987492 32768 16 50606 62411 1354601 1328094 32768 32 77854 97341 1696320 1515066 32768 64 92070 124450 1803026 1489371 32768 128 106251 140017 1759831 1422221 32768 256 109843 168814 2251960 1951403 32768 512 129945 174841 2398509 1852431 65536 4 19576 21642 801281 648929 65536 8 31433 35684 1254710 1050877 65536 16 53170 66636 1695094 1476601 65536 32