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: Mon Aug 24 01:30:00 2026 Auto Mode Machine = Linux oleg623-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-oleg623-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 2435 9033 85087 542506 64 8 2996 12388 821391 603489 64 16 5057 27324 1124074 889431 64 32 4004 32736 1363961 1083249 64 64 5815 52338 1279447 1599680 128 4 1909 5716 254947 462100 128 8 3505 19050 908709 776042 128 16 9502 16833 1048974 927549 128 32 7721 66216 490380 789741 128 64 8972 43419 1455701 1377278 128 128 6297 76730 1455701 2098744 256 4 5722 4196 651619 597916 256 8 6083 17924 249254 947860 256 16 8743 21078 1197295 889002 256 32 9267 17880 951219 219005 256 64 4912 28494 1375171 1286217 256 128 13162 49277 755195 1376935 256 256 7201 80047 1814348 2170027 512 4 5224 5900 491324 310518 512 8 11709 13443 498625 753025 512 16 9657 25482 1051757 639169 512 32 16951 47828 1199171 1060063 512 64 20337 74731 1293037 1326585 512 128 21213 53816 1357615 1380303 512 256 23111 52728 1729323 1339827 512 512 14322 81959 1193838 2071249 1024 4 7378 6998 359688 108855 1024 8 13014 11268 662414 172102 1024 16 17765 32140 1149061 660276 1024 32 20219 30104 1414770 921705 1024 64 31310 50321 892033 1193442 1024 128 16561 59047 1454537 1098792 1024 256 24922 78013 1090423 1096268 1024 512 24292 42588 1672621 1506051 2048 4 5159 8173 261825 143861 2048 8 12684 9731 382730 225051 2048 16 25778 15987 627469 902986 2048 32 14738 39733 703527 228062 2048 64 34138 45306 890443 635030 2048 128 26863 35516 1373553 925459 2048 256 22923 50032 1002933 526060 2048 512 39671 80338 463448 1592555 4096 4 8348 7019 266268 182415 4096 8 12387 13136 378379 256225 4096 16 15269 24160 289756 503988 4096 32 24368 34058 680153 535351 4096 64 33393 26228 287742 502220 4096 128 26357 40155 450361 377830 4096 256 46375 77028 1740825 1062268 4096 512 40514 77881 646374 457290 8192 4 9844 5845 259601 343708 8192 8 10532 12107 576091 473994 8192 16 14586 24424 778182 575840 8192 32 18747 24390 812924 582814 8192 64 24227 33934 760342 440194 8192 128 3090 42659 931541 732011 8192 256 20922 41063 1084183 738604 8192 512 30759 42879 935906 541586 16384 4 5771 5363 187517 250504 16384 8 9562 11433 279804 493863 16384 16 11572 15653 394434 426400 16384 32 16874 23700 750664 612763 16384 64 23313 24990 508517 277841 16384 128 30918 30508 345908 282006 16384 256 34022 40959 910230 496485 16384 512 67761 54853 992671 1008743 32768 4 8528 6971 211243 231851 32768 8 10386 7024 559803 602353 32768 16 11638 13915 540789 440016 32768 32 22092 21165 439384 290036 32768 64 22570 35472 674670 998656 32768 128 29429 39115 525203 562841 32768 256 53313 37844 841821 941041 32768 512 53193 52013 512465 647717 65536 4