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 Oct 10 15:54:11 2025 Auto Mode Machine = Linux oleg120-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-oleg120-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 7145 12121 139099 195111 64 8 11646 27305 405610 169809 64 16 14165 42583 491815 192730 64 32 15344 85222 821391 571375 64 64 23181 55891 998622 1279447 128 4 6676 14889 202226 404939 128 8 13071 31387 488594 178551 128 16 16243 45210 631014 544601 128 32 16272 60432 887675 356533 128 64 13788 27759 805138 1024942 128 128 34059 103407 1185654 68707 256 4 9986 12740 217497 225965 256 8 16505 22887 224782 410953 256 16 17450 42982 398892 587127 256 32 36071 64711 643419 125483 256 64 33992 82476 649647 999940 256 128 29071 121329 1340826 462061 256 256 36945 107161 1137672 1842366 512 4 9527 14824 200478 217603 512 8 14110 29772 367040 285690 512 16 30669 35275 1166599 545766 512 32 46775 50839 640694 577932 512 64 26353 114466 1051242 1026126 512 128 41771 119992 1296159 453074 512 256 25082 119485 826016 1308798 512 512 43097 35759 1323315 2132967 1024 4 15383 15961 220970 203980 1024 8 19957 27792 464581 476752 1024 16 29624 43336 598117 471259 1024 32 41724 58921 669748 819211 1024 64 29784 52566 771116 801179 1024 128 62155 80929 1460969 1011817 1024 256 50720 55728 1530742 1155553 1024 512 37118 84600 1488307 1670020 2048 4 10188 12276 133064 232992 2048 8 15951 19507 126522 223749 2048 16 19974 32711 263885 388477 2048 32 44364 37459 604848 567336 2048 64 42166 50430 913453 982177 2048 128 37968 102113 1346425 728342 2048 256 49177 58122 1553669 1003988 2048 512 39773 46531 600031 988393 4096 4 11806 12414 290250 158073 4096 8 18085 18367 255585 274751 4096 16 29027 28699 479458 429982 4096 32 31223 32302 642314 698260 4096 64 46141 66802 1079557 759639 4096 128 52496 60714 861025 928350 4096 256 69994 74761 792253 802654 4096 512 42427 75540 682992 904403 8192 4 8693 10244 204539 190781 8192 8 16996 20859 169182 189427 8192 16 18997 25601 447801 241062 8192 32 35182 31300 3100 712402 8192 64 54507 58210 857882 579639 8192 128 46884 69370 770504 1089477 8192 256 68521 79155 1065127 361644 8192 512 54158 71912 796492 926592 16384 4 10954 11460 206911 115306 16384 8 15413 13074 161794 272042 16384 16 20497 30380 547265 458087 16384 32 27576 39272 618777 627616 16384 64 46944 65306 927378 927215 16384 128 52115 62040 794566 899624 16384 256 47505 50039 1086545 724630 16384 512 56284 77994 1434920 953433 32768 4 10334 12193 123339 101080 32768 8 17902 18960 248321 221838 32768 16 23459 27929 356739 315170 32768 32 35552 40715 517981 452678 32768 64 42823 44922 683691 702650 32768 128 39952 53809 1011921 849328 32768 256 54155 80303 556920 1042738 32768 512 62911 78004 934013 618159 65536 4 9712 9419 177484 129876 65536 8