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 12 16:25:33 2026 Auto Mode Machine = Linux oleg458-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-oleg458-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 2162 4753 532815 367817 64 8 2645 11111 695778 402569 64 16 1636 5063 1124074 712397 64 32 3412 24006 202622 1279447 64 64 2802 57755 1363961 1066042 128 4 2293 7977 378663 465304 128 8 2981 10320 795593 566435 128 16 5522 15642 852438 870405 128 32 4511 14242 1543594 962469 128 64 6504 16208 1185654 1000121 128 128 7813 63177 1455701 1359835 256 4 5177 8880 281024 381597 256 8 6374 10594 392620 427478 256 16 7725 29318 584252 809878 256 32 8817 29103 439912 425951 256 64 9635 29660 1376935 970126 256 128 12292 55580 1532153 910872 256 256 14686 58144 733527 2097948 512 4 5874 4636 527403 127395 512 8 11935 19113 800163 664895 512 16 10571 34759 614654 388768 512 32 13348 23406 587738 272046 512 64 13192 9483 307670 631277 512 128 11939 77479 922535 782951 512 256 17240 49009 1168504 1030558 512 512 21512 54329 1580419 1130370 1024 4 8141 6271 646461 567981 1024 8 6433 13134 204846 345343 1024 16 9378 14527 592915 533350 1024 32 12765 27183 686337 610965 1024 64 14301 45521 947320 125320 1024 128 22814 28216 1026078 425252 1024 256 19299 28163 675861 1483680 1024 512 40891 69598 981974 1712639 2048 4 4451 6720 290742 145775 2048 8 12287 14123 228008 316541 2048 16 18671 26706 255077 884665 2048 32 24605 18597 1119675 961939 2048 64 22662 20911 1169047 464928 2048 128 31714 37084 695890 748004 2048 256 27724 48752 1477506 1008823 2048 512 32752 54487 1051939 1341170 4096 4 5375 5082 268030 191832 4096 8 10239 9739 275641 371755 4096 16 12254 10094 410787 314041 4096 32 16100 25268 495642 364677 4096 64 28576 30672 380036 249559 4096 128 33863 30890 1593117 589344 4096 256 25977 42171 1687642 611626 4096 512 37671 38866 448048 742694 8192 4 5657 7666 311959 267712 8192 8 2409 13713 695248 609714 8192 16 14382 23264 666884 354020 8192 32 24263 29664 734060 620976 8192 64 29231 37865 598176 527598 8192 128 29047 51829 744445 609022 8192 256 45523 46049 1158695 914386 8192 512 40518 76371 1032884 949038 16384 4 7735 6607 337982 356329 16384 8 7931 8585 506818 315811 16384 16 11291 15695 286919 391363 16384 32 22926 20146 638574 448915 16384 64 28311 32539 430589 716082 16384 128 27507 55621 705902 689153 16384 256 30921 46137 642936 341803 16384 512 36469 51662 786670 703172 32768 4 6720 6006 299752 215991 32768 8 11024 9353 403849 304153 32768 16 13883 18424 357616 390164 32768 32 18333 27071 941099 575441 32768 64 32292 35599 526885 596518 32768 128 28600 37474 693793 569778 32768 256