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: Thu Jun 18 17:23:54 2026 Auto Mode Machine = Linux oleg350-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-oleg350-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 6903 16908 576282 400168 64 8 11771 28120 866463 710511 64 16 9471 54056 1066042 852702 64 32 12581 67162 1226821 1452528 64 64 15549 80398 1734015 1780008 128 4 10097 17464 753179 564055 128 8 15753 30733 1000121 615109 128 16 18138 40827 1967960 1185654 128 32 21210 59429 1281909 1082825 128 64 22389 113364 1885042 1406136 128 128 23054 108397 2727923 1997245 256 4 14513 16237 616807 514045 256 8 21505 30328 1023775 842278 256 16 18812 50088 1148625 1108314 256 32 32908 71731 2000242 815414 256 64 31613 71688 1398455 1579483 256 128 22902 111641 1629830 1673001 256 256 36877 127103 1938842 1881098 512 4 13753 17338 774759 598717 512 8 18075 32298 993834 927716 512 16 30475 50513 1160923 1080328 512 32 46039 85516 1350783 1139970 512 64 50097 106354 1533034 1515722 512 128 44459 154920 2416145 1541840 512 256 57251 117917 2187279 2143612 512 512 57801 145574 2049505 1983258 1024 4 15899 17603 673212 620229 1024 8 24552 30163 917570 930894 1024 16 38467 52009 1430318 923488 1024 32 42475 81000 1301187 1211964 1024 64 55128 101156 1281389 1319577 1024 128 68171 122444 2276316 1780809 1024 256 66166 124514 1492963 1469467 1024 512 90797 163556 1928757 2197132 2048 4 16225 17870 658949 687700 2048 8 26772 33427 1260296 1339497 2048 16 35819 53911 1211760 1561009 2048 32 59395 75075 1394287 1162246 2048 64 66333 102414 2169829 1821906 2048 128 96209 129252 2052157 1585208 2048 256 84908 138847 2001939 1787035 2048 512 86948 140015 1906837 1715309 4096 4 16099 18771 603865 701596 4096 8 27735 33020 983234 926497 4096 16 46561 52846 1108821 915097 4096 32 61413 79716 1585764 1311960 4096 64 69582 122674 2073910 1550976 4096 128 83499 129558 1890015 1639018 4096 256 101348 145357 2015752 1446262 4096 512 102798 143391 2167313 1793342 8192 4 16802 17463 736293 577427 8192 8 27469 31228 1036936 1099448 8192 16 43127 49769 1534683 1130113 8192 32 60716 81263 1451934 1403480 8192 64 77993 106593 1863952 1436996 8192 128 78241 114698 1618314 1585458 8192 256 88774 128794 2474272 1704199 8192 512 93346 146639 2221227 1558278 16384 4 16436 16797 707916 611112 16384 8 25984 29706 1120655 1044578 16384 16 43368 47094 1441632 1065751 16384 32 58877 73870 1246005 1083172 16384 64 73963 96034 1606766 1361487 16384 128 76575 107751 1848599 1415093 16384 256 87866 123670 2001918 1715593 16384 512 94838 132287 1847357 1554007 32768 4 15969 17310 712440 659170 32768 8 24651 26040 964383 743122 32768 16 39234 48008 1307624 997323 32768 32 59894 70495 1517659 1262450 32768 64 69925 96663 1686475 1245506 32768 128 79536 102454 1555851 1391366 32768 256 86049 113338 2011670 1509989 32768 512 92660 118733 1728622 1576228 65536 4