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: Fri Aug 14 18:04:16 2026 Auto Mode Machine = Linux oleg401-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-oleg401-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 2551 4197 124229 491815 64 8 2185 6083 866463 621657 64 16 1055 20970 842003 621657 64 32 2236 55705 1066042 432398 64 64 4831 56089 1526887 1638743 128 4 1416 2891 649331 540217 128 8 2268 10729 790905 595328 128 16 2519 9121 907174 342216 128 32 2279 28020 330828 743788 128 64 4089 31357 1504659 1440082 128 128 3857 59706 1185654 1557024 256 4 3361 3042 609455 628725 256 8 4657 17701 937924 763791 256 16 5449 17718 1031644 852984 256 32 13327 44676 1084800 1011241 256 64 14786 27359 481109 472430 256 128 8872 59799 727563 999940 256 256 9366 85361 1662639 2065659 512 4 7401 7366 409605 554074 512 8 4926 8634 282719 285046 512 16 7726 11949 689886 577932 512 32 22345 26279 836636 1160923 512 64 14729 25466 1358474 1091863 512 128 22819 74568 791318 934173 512 256 17764 79948 1441452 1635797 512 512 23065 81400 1293037 1783912 1024 4 4415 4228 298182 520866 1024 8 9910 7980 854073 322401 1024 16 13273 29858 1038483 1030016 1024 32 16633 18813 943781 408468 1024 64 24633 47387 1289467 1171629 1024 128 30590 49006 854752 745808 1024 256 36959 55709 1563622 450309 1024 512 32065 84169 1572783 1635675 2048 4 5137 7493 364601 359294 2048 8 14688 18445 514835 783838 2048 16 12975 14233 1159109 332250 2048 32 21900 30434 1244231 757102 2048 64 26251 32391 694708 457232 2048 128 38740 71533 1582579 1277730 2048 256 29818 42639 818805 288933 2048 512 31858 57320 785271 1433135 4096 4 6503 6581 418431 258406 4096 8 10319 7794 459652 454303 4096 16 20661 17965 352098 375641 4096 32 17644 27873 752684 453189 4096 64 28226 48920 623253 544100 4096 128 31425 36927 382124 596734 4096 256 45915 36031 388765 701596 4096 512 32921 69644 862321 588073 8192 4 4812 5184 341603 290869 8192 8 2414 8369 339255 314324 8192 16 10782 17088 552915 702512 8192 32 19938 27009 271337 397227 8192 64 20764 29883 642757 546965 8192 128 31399 30817 1086343 963893 8192 256 35458 34592 1132123 591432 8192 512 48613 63551 649034 909810 16384 4 6216 6124 232426 145583 16384 8 9041 9595 281831 526679 16384 16 16468 20314 746352 628943 16384 32 24587 24569 432958 354485 16384 64 24939 30916 1030372 713643 16384 128 29961 45868 565746 534587 16384 256 25307 38906 973614 490451 16384 512 38357 43582 761731 422465 32768 4 6043 6030 244756 203773 32768 8 9053 10898 463250 281226 32768 16 11367 12872 342180 247563 32768 32 16317 18368 913799 604507 32768 64