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: Sat Aug 22 06:38:00 2026 Auto Mode Machine = Linux oleg217-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-oleg217-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 1864 4903 645579 603489 64 8 3176 4996 842003 863676 64 16 4520 9787 415659 582535 64 32 5587 30145 686877 1033216 64 64 6185 55844 560635 801764 128 4 5853 7119 410199 445978 128 8 2900 10375 666253 609522 128 16 6142 10746 934004 680612 128 32 6490 44863 1051027 902598 128 64 12027 40023 1121270 1162547 128 128 9531 28274 1451764 1319723 256 4 7074 10122 517016 622890 256 8 8522 20246 567575 622890 256 16 7596 30238 987979 792543 256 32 16034 37762 1185399 927393 256 64 16105 50701 682691 797843 256 128 17290 51642 306537 1280084 256 256 14953 68614 1694118 1829808 512 4 9203 9266 363069 240835 512 8 14460 21420 319385 232617 512 16 15225 27298 946109 797489 512 32 12700 20592 1077618 1028091 512 64 10065 27008 532767 924123 512 128 22235 80796 657163 1433753 512 256 33672 64654 644733 457514 512 512 27991 72450 829847 355555 1024 4 6997 4543 199916 114823 1024 8 9793 8294 373579 673635 1024 16 11795 7658 641537 317023 1024 32 26487 33287 1090700 657244 1024 64 16669 33754 681329 699072 1024 128 35820 72680 890369 638390 1024 256 36075 72178 214761 1227903 1024 512 22101 27424 1381993 218242 2048 4 3986 4765 227452 129481 2048 8 7936 8709 409692 251323 2048 16 12819 12612 950760 861508 2048 32 18808 24800 618345 523399 2048 64 21566 27819 438065 587514 2048 128 26760 35427 951181 1213129 2048 256 31329 34261 247764 332571 2048 512 26591 44543 231935 206554 4096 4 4195 6266 447161 247552 4096 8 8871 7768 257192 238570 4096 16 9360 1188 536187 1319214 4096 32 14936 23278 652338 388098 4096 64 24779 27750 573583 331147 4096 128 33014 25231 751137 416130 4096 256 50099 58944 1760989 871463 4096 512 31779 47489 345561 894700 8192 4 4021 4801 121127 309751 8192 8 8897 12454 587498 423140 8192 16 11890 13756 465428 390337 8192 32 14841 16749 531022 415098 8192 64 14376 24022 738429 440996 8192 128 27708 40702 948802 726056 8192 256 28983 38196 891700 397071 8192 512 32620 50674 632545 420257 16384 4 4174 5741 239214 206503 16384 8 7142 9866 434186 390059 16384 16 13009 12479 609659 446491 16384 32 20044 21388 694558 295772 16384 64 26242 34227 859511 1054646 16384 128 25397 44175 562150 848076 16384 256 27262 32448 482053 609162 16384 512 24738 53691 1018386 619151 32768 4 4208 4414 122009 134270 32768 8