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 Sep 5 20:03:27 2026 Auto Mode Machine = Linux oleg110-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-oleg110-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 1630 11315 566551 511494 64 8 2445 8170 735831 627470 64 16 4833 25488 852702 119156 64 32 5715 26801 1279447 223732 64 64 4624 65507 1330167 1933893 128 4 2871 9231 475609 219506 128 8 5680 16179 735635 1142750 128 16 4186 10865 824932 643108 128 32 5634 34408 1172704 1040839 128 64 2260 30977 1111981 1451764 128 128 5745 30332 1269781 1504659 256 4 5878 3221 238831 311427 256 8 3820 11382 318825 448362 256 16 7409 7135 285356 396828 256 32 11426 38381 1137672 962301 256 64 9500 44445 434747 1044693 256 128 10597 48513 580775 1099237 256 256 14438 74742 1132871 2081678 512 4 3745 7733 253965 386738 512 8 9547 17439 667582 408592 512 16 14125 14321 581216 506863 512 32 16963 25123 566946 939486 512 64 21273 59148 1086890 685263 512 128 10824 48411 158605 727268 512 256 25420 77059 992456 1496706 512 512 14611 64184 202214 1007827 1024 4 10127 8757 208850 297418 1024 8 8605 16422 587160 341689 1024 16 6830 7957 1038734 952573 1024 32 12261 15280 676286 1064479 1024 64 12194 25382 279551 629778 1024 128 13084 26070 327041 667458 1024 256 19030 64052 832550 1097669 1024 512 25602 95592 649787 562330 2048 4 4838 6903 194845 298367 2048 8 7538 9288 1151187 206932 2048 16 17516 42493 510339 141778 2048 32 19129 15607 376474 707176 2048 64 25856 37049 586832 1182403 2048 128 16107 35404 730386 518878 2048 256 40227 43002 420522 145661 2048 512 19888 83725 1407538 524838 4096 4 10355 7075 241582 358012 4096 8 7451 11940 382592 282017 4096 16 15808 15781 754303 390657 4096 32 36438 28676 402152 683454 4096 64 23104 28227 757830 440105 4096 128 26698 31784 505798 681989 4096 256 26794 42112 600677 641403 4096 512 27186 36354 255840 393845 8192 4 4756 1881 320075 314532 8192 8 6432 8799 507246 314051 8192 16 12120 25871 553931 673749 8192 32 17688 27929 510372 435209 8192 64 20342 74227 691192 527865 8192 128 26658 39481 491507 695586 8192 256 35996 38673 1666023 1101845 8192 512 42006 68987 718344 294663 16384 4 9437 8111 144681 206334 16384 8 17014 7981 265156 460250 16384 16 11470 11929 221369 468515 16384 32 13230 16458 711051 880479 16384 64 30511 27388 458589 534271 16384 128 19687 23557 714303 356421 16384 256 24266 61969 491968 574554 16384 512 37848 42740 955780 725081 32768 4 6359 5950 174745 213405 32768 8 12631 15801 402090 361175 32768 16 18663 21303 648101 643013 32768 32 24890 32578 744423 850721 32768 64 21554 35081 359349 825891 32768 128 30969 44911 1258992 840482 32768 256