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: Sun Nov 16 17:36:19 2025 Auto Mode Machine = Linux oleg304-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-oleg304-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 2815 16753 118734 226948 64 8 7124 27861 426219 369844 64 16 5255 44385 666414 627470 64 32 5524 72730 889431 913649 64 64 7586 92890 733819 1255511 128 4 6511 17658 283188 281260 128 8 13322 34545 615814 170445 128 16 5009 14746 640042 95176 128 32 8107 67507 927549 1093856 128 64 16886 90385 1152564 1162547 128 128 17926 117662 1377278 1622919 256 4 5238 19056 337357 85531 256 8 13204 29290 197386 454050 256 16 19107 56202 766517 636553 256 32 28599 30203 1024752 876662 256 64 14425 124639 1117543 1152323 256 128 13527 32144 1132871 1340826 256 256 8796 134946 1514860 182739 512 4 7792 12896 247811 101206 512 8 15037 30081 160501 485328 512 16 23049 51586 821592 205465 512 32 36061 38383 188164 218444 512 64 19678 86911 1038532 1091863 512 128 33098 121074 1233614 636894 512 256 20307 152837 1414860 1635797 512 512 41190 164472 1500891 1961520 1024 4 15423 8434 89486 182401 1024 8 15616 17809 131265 421744 1024 16 11621 44494 384550 632095 1024 32 33566 75316 928479 813933 1024 64 32336 112169 1192117 1081091 1024 128 47401 56506 203951 1177088 1024 256 28315 139988 1683768 1532928 1024 512 36370 116404 1681132 1033237 2048 4 14132 14820 210054 227555 2048 8 23362 22211 569027 398663 2048 16 13084 27109 641432 310815 2048 32 17847 27309 622332 824781 2048 64 46540 63241 1184523 470377 2048 128 34125 44670 1354493 513942 2048 256 35630 147720 1660915 300991 2048 512 28776 132000 1316100 1498120 4096 4 6415 10854 114250 89216 4096 8 12311 17140 444684 206283 4096 16 23883 29367 567707 401213 4096 32 46165 25237 313410 344349 4096 64 33780 41352 407561 992264 4096 128 41237 46854 1445288 1223392 4096 256 42197 67871 1216118 1387957 4096 512 68682 74000 1075098 1317494 8192 4 8722 9229 148480 100911 8192 8 15276 16956 193102 186487 8192 16 3174 24801 621447 262800 8192 32 29208 32697 956355 564303 8192 64 45637 47475 1241777 1069204 8192 128 35253 41638 1504511 1258745 8192 256 46653 75276 1388956 1320420 8192 512 39085 70468 1563668 1417550 16384 4 6248 8043 124531 79105 16384 8 11991 18308 392903 319401 16384 16 19533 30554 277023 467540 16384 32 30272 29829 257250 460352 16384 64 36702 41078 405985 947713 16384 128 43359 49676 892370 1016623 16384 256 37775 60061 842152 1226546 16384 512 43255 68291 1686292 740553 32768 4 9063 7854 142394 107010 32768 8 12845 12993 290439 177315 32768 16 22554 25601 368233 573728 32768 32 32421 33551 440099 393476 32768 64 28289 36603 840595 863679 32768 128 37738 46249 887924 421654 32768 256 59302 53881 530751 806179 32768 512 38101 54338 310956 768911 65536 4