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 24 09:59:28 2025 Auto Mode Machine = Linux oleg208-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-oleg208-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 7454 7721 538156 404998 64 8 11648 34557 727850 666414 64 16 10449 45778 811459 811459 64 32 11136 59867 1029254 955947 64 64 7266 84765 1249666 1484662 128 4 10049 17188 180533 215887 128 8 2360 16297 859260 529038 128 16 12333 54862 927549 761728 128 32 25301 75917 1057236 809997 128 64 15606 114378 526444 1133103 128 128 16124 130472 907174 1778862 256 4 8150 10780 271434 497147 256 8 23831 21587 714967 805021 256 16 9413 57450 1012194 729540 256 32 19817 96353 1683493 1235882 256 64 40069 122310 73288 1099237 256 128 20092 122478 1455317 1398455 256 256 45212 159195 1881098 2187712 512 4 17440 21626 599553 539595 512 8 23391 16985 568899 756207 512 16 30968 36526 800163 1028091 512 32 47393 37699 1379416 312188 512 64 28678 125644 1402845 1375881 512 128 22236 149569 990168 1216149 512 256 27038 101345 1624659 1560891 512 512 66270 44826 213344 1842059 1024 4 12641 12475 616844 611748 1024 8 16208 36503 690086 739898 1024 16 37392 37706 927677 759659 1024 32 32876 76910 982873 932714 1024 64 40346 47888 1232130 1272279 1024 128 61306 172677 818587 1132995 1024 256 63272 138490 432794 1477555 1024 512 37070 61058 1370965 1204825 2048 4 8601 12646 644609 550361 2048 8 19452 21166 966485 749963 2048 16 25112 22781 1049754 934317 2048 32 35797 50484 1371798 377798 2048 64 25088 60391 1472188 1203947 2048 128 38460 106812 1499166 1302727 2048 256 41834 122297 1402711 1342847 2048 512 38310 88781 1499166 1360069 4096 4 9929 19218 664397 468271 4096 8 20788 30932 899055 786163 4096 16 31392 31811 767616 919653 4096 32 51953 60572 1060563 503191 4096 64 39077 60749 1180762 1013334 4096 128 34508 44496 1378712 1103480 4096 256 34403 49552 1214742 1260278 4096 512 37678 48291 1438752 1203256 8192 4 13092 11846 612442 512802 8192 8 20155 15667 759149 564071 8192 16 22100 20903 421944 531392 8192 32 27641 45320 1002214 988064 8192 64 33766 68119 817722 311187 8192 128 38301 40856 466782 955105 8192 256 39076 43581 1248364 1200641 8192 512 43405 50140 1307607 1127295 16384 4 7051 9195 524504 277342 16384 8 15065 18045 231458 249177 16384 16 23192 24459 557390 841070 16384 32 30713 42020 1020745 717084 16384 64 41119 41418 1324819 358959 16384 128 44086 65549 1031346 844844 16384 256 58626 69438 1115688 599291 16384 512 37486 47926 1395920 943174 32768 4 9059 10027 414297 218510 32768 8 16061 16605 487554 509469 32768 16 21698 32406 869433 565939 32768 32 39955 48075 608040 762631 32768 64 44899 72626 1052415 1077464 32768 128 48195 51397 1332201 1105678 32768 256 40194 73498 662433 652904 32768 512 51357 60555 1461808 1299035 65536 4