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 Oct 24 10:10:07 2025 Auto Mode Machine = Linux oleg305-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-oleg305-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 4008 20253 576282 647135 64 8 6673 33898 852702 695778 64 16 9916 22316 1066042 1033216 64 32 5645 66794 1255511 1638743 64 64 9295 90297 1279447 1991276 128 4 7878 18346 547377 559353 128 8 10563 34287 864797 786271 128 16 15377 27801 1306873 814915 128 32 9878 79503 455436 1142750 128 64 13249 97936 1022989 947186 128 128 10836 107185 1637771 1827299 256 4 11717 17299 491233 572721 256 8 16638 36614 977189 661657 256 16 20039 49573 1103757 1084800 256 32 20200 78165 1340826 962301 256 64 12581 114376 617161 1071806 256 128 22686 121549 1610276 1391207 256 256 16517 103644 1817419 1023775 512 4 11224 20987 604617 583744 512 8 20167 22140 639930 714207 512 16 29580 47926 1361920 957072 512 32 34853 90830 1240025 178202 512 64 36969 105632 927716 1296159 512 128 47770 86911 1357615 1340664 512 256 17545 107160 1667552 1316016 512 512 28468 133443 1789859 1062161 1024 4 10439 15318 567981 427198 1024 8 22913 29916 864908 714065 1024 16 31715 19316 817185 723203 1024 32 51876 84943 463979 1044799 1024 64 30682 64055 1224752 1340164 1024 128 55779 112451 1519371 1153071 1024 256 50027 83400 1732676 215353 1024 512 66761 75841 1851434 1738286 2048 4 12788 15794 633859 184821 2048 8 27512 10416 588359 613750 2048 16 28046 57914 1196235 850168 2048 32 20810 45986 1261962 523527 2048 64 30508 71105 1351084 1266614 2048 128 50418 128183 1544450 1301149 2048 256 51712 135747 1575323 1501525 2048 512 50721 92879 1744572 1480817 4096 4 11129 14986 439149 357699 4096 8 15586 15992 661710 764031 4096 16 22627 28757 1070276 613461 4096 32 43331 40439 880666 907988 4096 64 48935 88958 1472290 1301524 4096 128 64932 90917 1600091 1297494 4096 256 63147 78426 1914019 1308164 4096 512 61444 120928 1766421 1203256 8192 4 13800 15032 549616 357229 8192 8 19863 21769 753506 491922 8192 16 42449 46309 1177679 619576 8192 32 42810 41871 1178042 633665 8192 64 35464 54225 1028771 1181607 8192 128 51395 63336 1005529 1252049 8192 256 38522 75307 1598141 1398909 8192 512 50132 71466 1550683 1669098 16384 4 10325 12773 641933 437025 16384 8 16844 23415 503226 428015 16384 16 27430 29888 428618 5356 16384 32 33020 44554 1310594 361893 16384 64 35639 47650 1516323 1097022 16384 128 34911 61154 599140 1169119 16384 256 39414 66738 737358 923043 16384 512 46992 70918 1355392 1361595 32768 4 10575 11012 534778 307305 32768 8 21552 24001 577186 438367 32768 16 29874 33606 1070882 1000277 32768 32 31700 50957 1176332 981988 32768 64 54864 50834 1102299 851759 32768 128 50078 72242 1419020 706420 32768 256 37016 48702 634339 1197090 32768 512 35416 53912 1722728 1298261 65536 4 11209 11007 362229 270912 65536 8 15867 24794 537599 517567 65536 16 29944 30256 1147256 496019 65536 32 36360 46714 1288306 1012106 65536 64 35960 49337