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: Wed Aug 19 01:12:00 2026 Auto Mode Machine = Linux oleg436-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-oleg436-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 1130 2744 492717 621657 64 8 2766 9364 852702 640954 64 16 2189 19161 1033216 673098 64 32 3323 24260 1279447 1183548 64 64 2814 60597 1183548 1828508 128 4 2348 3679 618653 332467 128 8 5329 12587 670413 515822 128 16 6233 23889 947186 800337 128 32 2594 52347 99148 969421 128 64 8061 64420 1291158 719853 128 128 5752 19598 1377278 1827299 256 4 4056 4963 213858 513063 256 8 4750 4856 55930 659625 256 16 5617 11058 258371 464661 256 32 7154 14117 256519 600928 256 64 6272 48139 701422 725106 256 128 6988 36860 1163562 669913 256 256 5278 32774 1027695 1497953 512 4 2677 2516 137634 479905 512 8 4663 5641 166280 784094 512 16 5149 15661 954944 901241 512 32 7247 22115 863203 142891 512 64 8041 18166 1273861 1201856 512 128 9017 45898 1467055 1286067 512 256 7030 51749 861818 621413 512 512 12271 73509 1174897 492338 1024 4 2664 4419 87572 218009 1024 8 6967 6275 136752 772781 1024 16 10038 28211 808265 208041 1024 32 7093 9419 1167807 941918 1024 64 22092 17201 977950 993100 1024 128 29622 64670 715612 937600 1024 256 33372 44786 1571057 948157 1024 512 27926 39079 1630707 1605111 2048 4 3730 4956 132360 148816 2048 8 6321 8142 859096 171912 2048 16 6787 16935 359745 411655 2048 32 13653 34447 1088186 433248 2048 64 22295 33151 1318727 560927 2048 128 13107 40464 535138 338562 2048 256 13663 35864 394453 501373 2048 512 19581 31697 577909 242888 4096 4 4239 5397 193718 150339 4096 8 6032 6028 411781 187623 4096 16 9827 14791 452604 210690 4096 32 9138 1205 369779 711623 4096 64 14130 46819 738290 219554 4096 128 26339 43233 947081 295868 4096 256 37372 48404 541442 403190 4096 512 24435 27873 134666 291278 8192 4 3847 4927 220126 144202 8192 8 8346 7234 193162 243086 8192 16 9814 8478 246628 190374 8192 32 19365 18243 777601 533952 8192 64 18631 30868 741089 589686 8192 128 26089 39154 455434 672799 8192 256 33797 41598 699751 1119727 8192 512 36000 51238 436160 954866 16384 4 4891 5155 211641 132457 16384 8 8580 13316 323986 381554 16384 16 16406 19942 710493 266142 16384 32 14593 27607 1026386 395615 16384 64 16061 19600 503871 361333 16384 128 22561 25662 684546 557675 16384 256 18241 29144 1111753 500765 16384 512 17679 31231 1023619 674985 32768 4 3983 4858 263656 234155 32768 8