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: Tue Aug 5 10:57:43 2025 Auto Mode Machine = Linux oleg443-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-oleg443-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 5506 17353 14032 215471 64 8 11453 27291 415659 390278 64 16 14231 58396 608965 357529 64 32 15740 69330 987600 743988 64 64 16762 51327 1188789 1452528 128 4 9643 17797 273382 273382 128 8 18396 32939 522346 468962 128 16 18040 31310 727658 204148 128 32 11903 78861 921183 836500 128 64 19370 105521 934004 1185654 128 128 13681 115336 1229084 1637771 256 4 13307 12966 251473 265856 256 8 18789 26285 497838 304020 256 16 29452 54491 494172 571502 256 32 35281 75093 754665 841618 256 64 40764 73731 1112909 962301 256 128 51067 120987 1340826 1430119 256 256 56015 151662 1673001 1981783 512 4 7935 11296 268073 284630 512 8 22984 38024 441704 570865 512 16 33087 56890 640694 572081 512 32 46592 88044 884172 828566 512 64 59875 99846 1070633 1066380 512 128 44731 129157 1261144 963945 512 256 32510 60996 1302447 1463057 512 512 50284 80705 1125040 2099600 1024 4 14378 18925 214044 123476 1024 8 28511 27288 373449 362358 1024 16 39774 50801 775712 705735 1024 32 41836 77948 898941 785788 1024 64 43079 100439 394293 1023877 1024 128 38789 103195 1352828 1178380 1024 256 46640 107857 1544504 752868 1024 512 89096 144836 1718120 1542286 2048 4 12861 12032 268202 135781 2048 8 18668 25283 436684 331711 2048 16 26076 31797 582968 120435 2048 32 30631 88993 965182 838303 2048 64 53366 73244 576900 518064 2048 128 53514 63211 1353426 1026055 2048 256 69745 115289 1639674 1392253 2048 512 85382 142203 1427182 1474462 4096 4 14831 14216 187006 233695 4096 8 14880 28362 413735 320395 4096 16 20158 34409 280777 623525 4096 32 48406 65168 594319 463034 4096 64 51095 78587 1006624 914075 4096 128 68756 125310 1429177 825328 4096 256 55628 108008 489722 1329937 4096 512 71877 134396 1499272 914075 8192 4 15363 16969 232561 279543 8192 8 25230 28829 409474 415711 8192 16 31935 35633 277159 375796 8192 32 43224 61764 551354 822814 8192 64 51661 56793 549871 804719 8192 128 52454 97887 1438440 976411 8192 256 69390 72207 766551 1111972 8192 512 58915 96253 1445824 674450 16384 4 12958 13595 246160 257642 16384 8 27968 29336 207140 413383 16384 16 29574 45382 530227 589731 16384 32 48951 90503 928317 626774 16384 64 66797 85240 998774 772973 16384 128 73038 87083 1167352 679215 16384 256 84098 111592 1099005 1211197 16384 512 72550 93629 1838215 1014926 32768 4 13317 12580 203219 227875 32768 8 26791 31091 467454 332433 32768 16 33317 45980 457800 507190 32768 32 43966 62095 636259 491842 32768 64 49103 70916 1049859 641190 32768 128 61293 93104 731331 553139 32768 256 73168 102426 677767 690478 32768 512 64641 98661 1121348 990388 65536 4 12455 13083 198885 214589 65536 8 22665 25160 438107 410987 65536 16 41739 50000 661639 678053 65536 32 54729 71127 794156 662728 65536 64 60517 77622 751869 733679 65536 128 67153 100553 836729 1132467 65536 256 70762 110483 1562349 1032076 65536 512