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: Mon Aug 31 14:43:55 2026 Auto Mode Machine = Linux oleg451-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-oleg451-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 3264 12441 168424 245190 64 8 7138 17240 942521 863676 64 16 7641 31652 426219 874936 64 32 2825 35339 1363961 983980 64 64 4080 59921 1336792 1526887 128 4 4283 4988 539674 291649 128 8 5714 17280 794416 800337 128 16 11463 37252 767171 902598 128 32 11061 44337 1346196 1022989 128 64 14590 34670 339618 1142750 128 128 11116 104494 1561553 2211113 256 4 8633 9033 467086 341433 256 8 11054 14252 904732 764334 256 16 9841 8879 1123389 496228 256 32 10620 29913 1248819 815414 256 64 10406 42258 1598292 171584 256 128 18684 71972 1260547 1588832 256 256 22353 141676 633548 1286217 512 4 4343 10383 303325 467575 512 8 10862 13427 184052 293580 512 16 20966 25286 1096322 815353 512 32 15747 59197 1375881 571472 512 64 22361 25636 1383861 1344020 512 128 14029 48785 1575781 711133 512 256 10195 70611 1605228 267505 512 512 42370 119292 1667552 2178404 1024 4 10669 12376 506195 261429 1024 8 13539 20355 919337 309462 1024 16 22404 35008 330641 985354 1024 32 36670 60037 1286378 297748 1024 64 30846 63000 851870 567006 1024 128 35731 83137 1284839 610184 1024 256 17681 113112 1633188 1328146 1024 512 52311 97542 1372717 225448 2048 4 8359 10115 316495 309281 2048 8 15941 18743 942002 697529 2048 16 16942 16596 969758 317231 2048 32 20744 28073 933403 778087 2048 64 36292 44651 1447382 720885 2048 128 40563 54238 1111130 654929 2048 256 27658 58754 1110699 829159 2048 512 51243 50428 1321161 1045410 4096 4 7532 6267 223228 208077 4096 8 11903 12445 463346 499940 4096 16 17137 19657 824496 590032 4096 32 14531 29958 698260 649650 4096 64 22689 30865 1579641 510336 4096 128 30437 30124 746762 476506 4096 256 46341 63152 1708792 1021953 4096 512 34267 56423 1759546 525124 8192 4 5824 6159 2232 249444 8192 8 6835 9353 311710 280490 8192 16 11145 18743 443885 513277 8192 32 16653 22936 478449 572187 8192 64 15988 25287 911838 695346 8192 128 28971 40347 916533 783113 8192 256 26108 55700 978748 930280 8192 512 34412 61931 776863 783631 16384 4 5363 6164 275672 319220 16384 8 9008 11189 364858 522868 16384 16 18750 20801 613540 343107 16384 32 18982 25678 670461 645775 16384 64 20998 45965 731363 639978 16384 128 25040 43917 612512 589989 16384 256 39022 53075 1266139 964053 16384 512 43432 59502 1148467 1004409 32768 4 5513 5833 225468 312427 32768 8 11836 8191 314050 311237 32768 16 11196 13133 218634 612350 32768 32