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: Sun Nov 16 22:45:05 2025 Auto Mode Machine = Linux oleg233-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-oleg233-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 4503 12037 209256 221334 64 8 3172 28983 438043 95671 64 16 3877 26557 627470 533875 64 32 5888 61471 863676 831569 64 64 3209 81645 969761 1421755 128 4 3987 8312 104068 345965 128 8 6740 26305 496272 389091 128 16 6130 49784 348888 656477 128 32 7808 67228 971174 805138 128 64 5372 76687 809997 1040839 128 128 10208 30844 1303699 1377278 256 4 6284 12778 262284 77038 256 8 11924 26454 423265 384467 256 16 11327 38682 585845 214370 256 32 16378 64047 1208072 755195 256 64 16901 94604 1016025 841618 256 128 16310 98042 1391207 1376935 256 256 11768 116258 1552085 1938842 512 4 6585 14281 196551 233249 512 8 12362 19388 459668 229608 512 16 11286 11074 194451 176358 512 32 10024 26341 673655 562638 512 64 11644 69762 1110496 999850 512 128 13164 36568 94728 904658 512 256 18973 76943 1541840 1446306 512 512 17894 105632 1204552 1924603 1024 4 7636 16261 96923 187137 1024 8 16069 24541 170754 120429 1024 16 17001 46481 639626 429161 1024 32 9403 13672 942125 756315 1024 64 34090 72016 1080004 952573 1024 128 46486 64487 1185209 1206178 1024 256 34933 61468 1517224 1067654 1024 512 18351 114274 1141426 178304 2048 4 9159 11882 201595 219934 2048 8 15216 20043 260066 426303 2048 16 16803 33184 713816 440039 2048 32 36633 33959 1023487 830522 2048 64 45747 32144 1086397 1034333 2048 128 32955 55413 1457698 1149954 2048 256 38699 94578 684958 897139 2048 512 39060 85607 674100 394688 4096 4 14126 13499 186817 247731 4096 8 17115 16161 289185 258796 4096 16 29793 45489 544687 489946 4096 32 27838 52827 271924 697183 4096 64 37513 44397 1036192 444926 4096 128 43616 67451 1322158 1121854 4096 256 34810 46430 1530663 1055676 4096 512 37382 52450 1244574 1452498 8192 4 12367 11880 214877 238348 8192 8 15260 23511 471645 310774 8192 16 25831 30964 685579 415455 8192 32 32319 53199 330974 502579 8192 64 38613 64966 907192 561637 8192 128 40372 52962 777373 1040390 8192 256 61332 74487 1260731 1218309 8192 512 59246 79020 1218482 869650 16384 4 14587 4520 196684 135623 16384 8 16986 14846 393440 403416 16384 16 28016 33169 429258 478575 16384 32 39214 46027 731620 424863 16384 64 41325 46015 717585 299891 16384 128 42528 74320 1037090 782309 16384 256 50272 72352 1408278 1026570 16384 512 54288 79301 1381218 1130165 32768 4 10039 14002 171527 147174 32768 8 17598 21652 308314 239325 32768 16 26220 25655 614288 400513 32768 32 28851 30550 489009 402669 32768 64 33992 37401 547110 993574 32768 128 28379 36545 389585 944865 32768 256 42114 69796 787977 522389 32768 512 37322 66876 1063622 736607 65536 4 7220 6451 91646 207985 65536 8