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 26 17:27:13 2026 Auto Mode Machine = Linux oleg339-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-oleg339-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 2655 5826 102895 300328 64 8 5611 21475 668072 320021 64 16 5765 46076 1049372 557144 64 32 3750 39029 283217 1232453 64 64 5789 18680 1421755 440921 128 4 6604 12292 592046 439767 128 8 6576 13530 60006 301307 128 16 7705 18873 1017175 673778 128 32 2818 12573 1175271 643108 128 64 7718 51224 1206978 407707 128 128 4632 110539 1526043 1755594 256 4 6086 6211 616807 530031 256 8 13672 22340 952062 533190 256 16 11169 35101 1040643 958864 256 32 14959 51590 1213534 1112909 256 64 8753 61508 1213534 611189 256 128 6962 49429 750445 661657 256 256 15055 131476 1561112 2081678 512 4 3826 4602 170546 345932 512 8 13363 18987 182923 519744 512 16 11487 45795 700234 268777 512 32 4450 11660 141665 384041 512 64 12478 14201 601737 955368 512 128 18667 35191 263760 91038 512 256 10272 64200 1712772 1589779 512 512 35092 55562 1616100 1867692 1024 4 9913 7188 356316 435736 1024 8 6447 8363 827258 226041 1024 16 28162 29062 555924 202690 1024 32 32136 19348 859026 511256 1024 64 17943 22088 1009913 689090 1024 128 34181 36622 678102 574592 1024 256 39097 63543 1625154 135343 1024 512 44448 85212 1625154 1765437 2048 4 7854 7833 488208 158747 2048 8 4170 16558 204557 230504 2048 16 26785 13857 779287 895455 2048 32 21411 36263 305313 1098203 2048 64 17975 47427 470789 310208 2048 128 16522 30498 951602 718113 2048 256 24431 40086 604677 674789 2048 512 17662 51553 525963 468862 4096 4 4868 944 241508 418472 4096 8 8960 11096 474794 240124 4096 16 10111 15462 438823 259849 4096 32 20464 26395 558117 367186 4096 64 17944 40056 481933 650560 4096 128 31869 62015 584313 555608 4096 256 44881 51140 1159641 466669 4096 512 30661 65015 515543 708424 8192 4 5590 5830 176024 383035 8192 8 11637 11048 513377 322061 8192 16 14546 18179 721694 307404 8192 32 20987 29141 748809 978023 8192 64 26517 30549 751347 491564 8192 128 29618 37218 405866 570714 8192 256 40718 45840 937412 703720 8192 512 41763 53107 410379 851652 16384 4 6102 9311 271906 216998 16384 8 12332 11899 977103 236366 16384 16 21603 42807 642611 418791 16384 32 25196 23671 598654 341483 16384 64 45187 43117 487168 559428 16384 128 41396 33372 266232 354317 16384 256 28709 35084 546825 358590 16384 512 20882 32814 288004 1116014 32768 4 8156 5889 220867 224383 32768 8 11892 18317 535198 413999 32768 16 23028 24850 375392 277105 32768 32