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 Oct 23 12:47:55 2025 Auto Mode Machine = Linux oleg606-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-oleg606-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 5427 20466 265565 209093 64 8 9131 31283 432398 380864 64 16 14004 22824 484710 621657 64 32 17901 74944 913649 695778 64 64 8020 51783 1017549 1249666 128 4 7622 17356 279502 136164 128 8 17057 24896 457376 477725 128 16 21914 45390 615109 316214 128 32 18332 36087 757430 606082 128 64 10637 89198 1172704 302666 128 128 28299 83718 1281909 1727352 256 4 7750 10902 261772 170332 256 8 19161 29609 429530 338633 256 16 26396 31565 790209 348300 256 32 36493 83359 895676 775933 256 64 41974 102311 1185399 870974 256 128 33242 116776 847597 1361224 256 256 57105 157930 1400278 1523457 512 4 8559 6757 62600 241078 512 8 6810 25768 228387 368047 512 16 11881 56295 582478 445184 512 32 29132 52180 1082507 740816 512 64 18480 64918 1161551 1014013 512 128 35910 105590 1270094 1071167 512 256 63966 67950 1537424 196767 512 512 54467 49891 1848401 2049505 1024 4 8041 8760 292556 170497 1024 8 23111 14379 464380 503938 1024 16 35961 31788 639245 588206 1024 32 49810 82096 509739 432794 1024 64 57677 47126 1153071 900637 1024 128 49299 130329 1218843 838074 1024 256 48924 75056 1475525 746846 1024 512 30347 153337 868581 1472995 2048 4 11868 14519 209900 164656 2048 8 19385 15882 365656 347351 2048 16 23436 29049 808859 502076 2048 32 25121 42053 487848 788009 2048 64 24146 48196 854736 462003 2048 128 63379 52056 1285570 1099890 2048 256 50234 75700 640189 1300361 2048 512 30266 90296 776048 905843 4096 4 11713 12932 255012 265216 4096 8 18874 20333 262364 397316 4096 16 29950 33841 500610 567070 4096 32 54544 56249 700881 476889 4096 64 39216 55586 622215 792582 4096 128 48384 61046 1352233 574869 4096 256 42704 71267 344985 856219 4096 512 74475 69547 1651623 1452498 8192 4 12301 10070 190621 168154 8192 8 12689 16166 335364 439013 8192 16 26890 32415 398753 554414 8192 32 32384 46365 806210 593321 8192 64 37275 54219 1152516 535567 8192 128 34545 59518 772392 585685 8192 256 37803 53500 1166286 1042505 8192 512 61479 38982 385251 918591 16384 4 9929 7435 135878 65939 16384 8 12194 17174 364428 229747 16384 16 20509 22264 523418 451733 16384 32 23753 38364 646310 635063 16384 64 37515 46576 876202 885049 16384 128 40163 71397 1035059 961275 16384 256 42039 60488 1461967 442595 16384 512 52515 90581 1205312 1159610 32768 4 9361 8288 133515 116841 32768 8 13725 14616 379725 152456 32768 16 23860 27046 330979 396880 32768 32 32262 43319 672040 412347 32768 64 36377 35020 542283 455067 32768 128 43611 73620 1201832 894494 32768 256 70465 92239 1054887 482428 32768 512 57458 81353 1273386 626431 65536 4