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: Tue Sep 8 10:02:50 2026 Auto Mode Machine = Linux oleg142-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-oleg142-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 2707 12759 542506 603489 64 8 2516 24416 1336792 372410 64 16 6671 29780 983980 799377 64 32 3844 55984 1255511 2052169 64 64 10611 60311 1599680 2689580 128 4 4712 4106 699227 475609 128 8 3973 11833 643108 441576 128 16 7753 33736 687585 262810 128 32 10081 26857 1123617 537512 128 64 11288 37757 1281909 2132084 128 128 6870 105355 1561553 1997245 256 4 4364 5613 249718 487442 256 8 11862 10269 797250 703260 256 16 12106 35097 910872 980760 256 32 12352 39337 1375171 1132871 256 64 17728 56990 1398455 1266495 256 128 13612 126370 1405778 453092 256 256 12127 159006 1610276 999940 512 4 10028 9758 355555 376434 512 8 6602 13826 531712 415952 512 16 10454 14693 1082507 967855 512 32 19047 35237 1270846 727268 512 64 18668 73081 1379416 1191189 512 128 29590 70806 1442420 1625889 512 256 20615 74462 999850 1450212 512 512 20212 43515 1574625 1580419 1024 4 5893 7250 592261 239476 1024 8 13368 23847 790707 727244 1024 16 22430 27066 1105865 848337 1024 32 29100 38982 817963 1163693 1024 64 38473 55537 1508167 425420 1024 128 29139 46107 937805 1317553 1024 256 32684 102513 2255990 1426043 1024 512 39844 46659 1544504 1646334 2048 4 12863 14272 573357 228956 2048 8 17220 13225 283460 782553 2048 16 11372 22747 708868 580487 2048 32 25545 41949 1314489 1108835 2048 64 42111 49948 857637 783767 2048 128 35081 68775 1524983 731942 2048 256 36478 109919 354446 1463909 2048 512 25252 32030 1675821 1016824 4096 4 6351 9676 275178 211045 4096 8 18561 12280 315778 481541 4096 16 15621 30056 499635 640089 4096 32 21209 18115 1309061 758801 4096 64 28551 46950 1471911 563499 4096 128 51392 50721 811757 383703 4096 256 33826 52734 1272035 263831 4096 512 43861 49932 1198054 521981 8192 4 6397 7733 341460 194802 8192 8 10191 19393 624157 614732 8192 16 17492 26000 1273818 584390 8192 32 38470 44071 715398 755444 8192 64 31175 44142 881430 567387 8192 128 37430 41271 673788 774202 8192 256 38413 46184 777672 640146 8192 512 47467 61346 890245 1046219 16384 4 9465 3521 431829 460392 16384 8 12794 13371 330457 569856 16384 16 21835 25445 675881 898049 16384 32 34765 42721 586359 483429 16384 64 41394 43468 763186 771047 16384 128 29273 43189 815247 841461 16384 256 39834 40260 1231491 501163 16384 512 36403 51708 1006011 869968 32768 4 6864 9137 363510 240100 32768 8 14331 15217 512297 339984 32768 16 25490 30659 603719 721317 32768 32 38332 34610 451281 548472 32768 64 42916 56659 1179300 1046932 32768 128 40644 60848 1253847 902820 32768 256 49998 66056 971706 587524 32768 512 41562 64877 940095 908328 65536 4 7833 10636 303833 267613 65536 8