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 Jul 24 09:48:42 2025 Auto Mode Machine = Linux oleg326-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-oleg326-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 6812 14087 183381 234276 64 8 11015 29521 409946 280847 64 16 12588 49610 591520 727850 64 32 17139 65990 889431 441646 64 64 12485 80810 1017549 355635 128 4 11527 13168 137349 240662 128 8 16546 33588 223342 393656 128 16 21854 51425 715059 445978 128 32 18618 60637 785122 716013 128 64 24218 88829 1032829 1007629 128 128 41983 95311 1332828 1424795 256 4 13666 13781 276466 249776 256 8 20091 33393 485678 395076 256 16 32938 53433 690151 562520 256 32 34376 88769 870974 848267 256 64 42888 121562 1243036 1040643 256 128 52609 109825 1168627 1180188 256 256 49573 116107 1325925 1532153 512 4 13130 12165 260686 242193 512 8 21904 34657 375315 357806 512 16 30340 48990 560875 533960 512 32 31874 88703 864942 735740 512 64 42873 111639 1105920 801059 512 128 41440 114698 1985091 1135150 512 256 74765 155616 1510391 1249404 512 512 71090 171007 1610042 2107844 1024 4 15545 20103 254218 330972 1024 8 31222 29994 409285 403480 1024 16 30848 47929 267086 566932 1024 32 57174 91698 936170 806899 1024 64 76521 114322 1236742 965203 1024 128 76503 127489 1452570 1466957 1024 256 94638 163500 1570483 1296083 1024 512 95283 180857 1726407 1510288 2048 4 18915 20531 254789 226648 2048 8 32513 37536 439207 411241 2048 16 49607 60669 707176 592417 2048 32 65001 86945 994688 1040724 2048 64 79309 114561 1388428 1108835 2048 128 93966 147295 1301149 772837 2048 256 92268 149980 1416357 1334088 2048 512 96073 144439 1594920 1403858 4096 4 19319 20321 274036 275956 4096 8 31777 36015 485021 440387 4096 16 47634 58124 714464 642314 4096 32 64413 86253 978251 903167 4096 64 63423 107834 1230049 962198 4096 128 88675 145512 1361665 1292515 4096 256 80025 129891 1440200 1237849 4096 512 94497 126442 1573564 1294171 8192 4 17469 20325 197960 250673 8192 8 29547 31423 397149 365257 8192 16 44001 51648 418277 636859 8192 32 60985 78531 438145 501684 8192 64 56953 119860 1175463 1157368 8192 128 84617 137111 1426910 1116090 8192 256 79985 98852 1508408 1233928 8192 512 61965 171076 1491061 730005 16384 4 13718 14750 274757 241936 16384 8 17391 14834 182449 198818 16384 16 27684 23395 242747 259371 16384 32 19419 43916 251624 276378 16384 64 5108 45103 282381 578019 16384 128 27864 48143 971824 383295 16384 256 30091 55461 1158789 800582 16384 512 32568 64723 1490958 1007132 32768 4 7723 8789 111942 168874 32768 8 14188 12090 144373 141417 32768 16 21061 28581 166905 181627 32768 32 30286 37692 874372 410817 32768 64 33246 47017 536389 243655 32768 128 51199 62168 892716 1189836 32768 256 51760 73289 477522 995748 32768 512 62015 82360 1297171 1397833 65536 4 13295 13932 226116 173788 65536 8 20470 25159 391762 286910 65536 16 32639 35744 527656 639643 65536 32