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: Thu Aug 27 07:20:49 2026 Auto Mode Machine = Linux oleg620-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-oleg620-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 1339 4280 627470 581273 64 8 2526 9043 653436 627470 64 16 5040 27936 1049372 818885 64 32 4893 44942 1143223 926260 64 64 2518 26090 1828508 1163036 128 4 1159 1897 176788 222232 128 8 2771 6515 761728 795593 128 16 6923 4384 1185654 809997 128 32 4932 22145 927549 940549 128 64 4201 37691 731625 1102844 128 128 6206 48630 1421023 1802755 256 4 3758 7314 381597 496228 256 8 9234 18451 401277 731528 256 16 6683 9696 996229 948698 256 32 10685 45478 104279 555248 256 64 5677 12773 1070737 510138 256 128 7300 24290 1489641 1061213 256 256 7767 56575 1619994 1868008 512 4 4584 4090 676414 266278 512 8 6376 7990 304055 313372 512 16 10222 20691 1117430 870905 512 32 9235 11487 1422357 1057974 512 64 12245 37578 1155302 1089094 512 128 9055 68799 1510391 128416 512 256 15704 52696 1132755 1546280 512 512 22744 61236 197309 1057974 1024 4 3422 4370 262227 324055 1024 8 11782 17331 488797 440427 1024 16 19997 25240 146222 412074 1024 32 10400 17472 846998 398131 1024 64 14361 29200 986485 835303 1024 128 21795 75317 912695 866478 1024 256 14020 61097 1466957 672791 1024 512 36870 74613 1004011 1286378 2048 4 6766 4934 184639 229801 2048 8 7770 18842 458061 343861 2048 16 21069 8967 658494 301308 2048 32 20593 10617 491842 203597 2048 64 27317 47519 1339497 1154436 2048 128 31371 49972 920402 1201758 2048 256 20007 63000 1062741 662149 2048 512 29699 42809 252810 1452522 4096 4 5607 5057 157859 204442 4096 8 7553 9378 339209 414994 4096 16 16683 15236 715207 538304 4096 32 26808 37602 724070 507367 4096 64 30093 50810 1081596 703406 4096 128 19250 38790 435233 781976 4096 256 47406 68878 997275 827474 4096 512 33168 33245 697778 696590 8192 4 5122 1505 320741 360324 8192 8 6273 9769 453900 394052 8192 16 11175 14749 593106 730051 8192 32 23906 33413 570799 523554 8192 64 19584 38528 930583 697492 8192 128 34568 33802 505484 677522 8192 256 20495 35681 849525 991886 8192 512 37511 49363 586055 662141 16384 4 8177 6915 236538 143521 16384 8 10881 11012 353979 173111 16384 16 11676 18218 904694 387943 16384 32 16997 25151 721541 673767 16384 64 20540 25707 752943 397255 16384 128 33118 39054 291499 790662 16384 256 25723 35926 651506 492620 16384 512 55879 63361 380367 252976 32768 4 4921 5068 406399 456023 32768 8 10140 10090 265235 461378 32768 16 19308 29879 390649 309433 32768 32 19020 32925 426772 351377 32768 64