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 Aug 6 23:52:39 2026 Auto Mode Machine = Linux oleg653-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-oleg653-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 1920 10738 118997 520419 64 8 2926 15343 710511 610350 64 16 5150 30104 1421755 110158 64 32 2328 18454 1143223 889431 64 64 5429 22687 1124074 1492919 128 4 2460 4311 568836 508012 128 8 8914 19420 921183 579270 128 16 11843 14678 1165070 221865 128 32 7114 63088 1065630 252906 128 64 6050 32804 1152564 1067750 128 128 12367 24168 1076312 2098744 256 4 4091 3573 673696 386682 256 8 6174 8461 632056 305143 256 16 8936 33233 1132871 670332 256 32 9308 21413 1008392 755195 256 64 14778 68540 1430119 556398 256 128 13390 22477 1463250 1195962 256 256 14340 76718 1660068 612235 512 4 4302 3952 235294 78781 512 8 7161 9804 519870 484890 512 16 16837 20829 639930 540137 512 32 19845 32180 1060063 920953 512 64 13934 53050 1309596 1118011 512 128 12752 67332 1155924 652967 512 256 21660 114925 503418 1057974 512 512 15875 77940 866338 2065273 1024 4 3959 8898 187718 265567 1024 8 17627 10497 666216 303492 1024 16 16273 31298 892775 250365 1024 32 24084 26666 387709 544990 1024 64 22140 60981 848337 519543 1024 128 43099 90363 934337 890369 1024 256 45697 106477 1111877 1532928 1024 512 33630 116008 1005892 498267 2048 4 6788 9665 239421 212339 2048 8 13569 14420 908621 478499 2048 16 13715 24537 1074977 355914 2048 32 19268 25537 681264 1109981 2048 64 27541 50620 739567 1079028 2048 128 24512 39808 1346425 392632 2048 256 23845 38708 687260 636630 2048 512 33293 66214 856184 1436971 4096 4 5916 10693 252980 300774 4096 8 12543 16305 388581 317078 4096 16 16812 23151 448527 254917 4096 32 19730 21044 859775 407610 4096 64 24989 35989 386596 543807 4096 128 37037 44985 766349 550164 4096 256 30572 43950 905595 678033 4096 512 32901 53252 461615 1235979 8192 4 6079 6808 375160 276390 8192 8 11391 12449 328993 227372 8192 16 15993 20802 227121 366649 8192 32 19222 21752 398832 408233 8192 64 25885 39454 723289 605065 8192 128 29576 39512 597645 401826 8192 256 31651 51515 666340 876729 8192 512 37744 53320 936978 575195 16384 4 6618 7337 202649 277568 16384 8 8143 8592 315095 446236 16384 16 15347 16243 283430 285794 16384 32 18127 28278 468193 507215 16384 64 25446 32283 681816 522832 16384 128 28188 33591 625508 261659 16384 256 30199 45955 775389 764502 16384 512 32738 60746 376359 323782 32768 4 4964 5537 478343 155516 32768 8 10391 7994 208942 327332 32768 16