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 Sep 7 12:09:17 2026 Auto Mode Machine = Linux oleg610-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-oleg610-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 2920 11600 170672 321554 64 8 5535 9818 821391 842003 64 16 6745 34152 889431 926260 64 32 7509 37846 1421755 259156 64 64 3622 66316 104254 1599680 128 4 9468 12471 615109 495814 128 8 7898 18249 780556 871818 128 16 6083 49555 969421 126002 128 32 7010 28151 1175271 969421 128 64 5750 20977 1243315 1303699 128 128 9281 13849 800337 1772988 256 4 6079 14995 775933 499925 256 8 6777 9195 996229 431601 256 16 9045 14420 1103757 750970 256 32 10927 53166 1325925 1163562 256 64 17312 107883 1201314 1274008 256 128 10109 127935 1642294 1168627 256 256 15109 56190 514045 1108314 512 4 7574 8048 114034 596721 512 8 20309 23799 650396 471062 512 16 12938 26116 500484 387576 512 32 30041 63627 626672 1135150 512 64 12839 77658 1496706 1199171 512 128 23324 83401 927716 735488 512 256 41303 54427 1619757 1707325 512 512 31882 108960 850554 1209982 1024 4 8304 10475 234700 586439 1024 8 12279 18214 691420 503229 1024 16 22402 32736 1102459 454310 1024 32 22055 25984 503465 786507 1024 64 40275 60266 354697 1082454 1024 128 37178 70262 1146607 899883 1024 256 42767 85755 1258117 553489 1024 512 29146 112463 1697745 1033237 2048 4 9060 10755 226774 248121 2048 8 10858 18687 496964 467891 2048 16 16501 27152 834557 372022 2048 32 17906 35809 487488 620220 2048 64 35893 52344 881579 1272054 2048 128 38629 52773 1662523 878513 2048 256 47619 95097 1591375 1124660 2048 512 41754 67931 495045 424177 4096 4 7635 8448 211810 208395 4096 8 11188 14774 601035 414874 4096 16 25826 26377 976639 431570 4096 32 26038 33174 887169 783009 4096 64 29845 56009 602891 1325524 4096 128 39321 58060 478004 670386 4096 256 37542 54104 1211060 646472 4096 512 50092 56358 580993 964683 8192 4 6972 8546 263313 243793 8192 8 2432 14026 846094 504490 8192 16 20664 29690 717834 571027 8192 32 20529 29690 1152361 809077 8192 64 31261 39399 819185 643322 8192 128 39159 50119 1075462 740482 8192 256 45230 53069 1007622 991056 8192 512 38460 67976 1532083 1059772 16384 4 9331 8371 400018 388531 16384 8 13997 15390 384285 346283 16384 16 19746 26027 859790 757216 16384 32 33679 40111 806928 728564 16384 64 47402 47767 1021383 788865 16384 128 40896 55638 1346680 836942 16384 256 51193 69436 829656 681363 16384 512 48243 63542 791390 930013 32768 4 8973 9427 338606 345188 32768 8 13147 17030 660152 557639 32768 16 24682 26474 480899 654144 32768 32 31027 38714 669679 499063 32768 64 33662 40770 922676 758958 32768 128 42400 36275 1128298 619818 32768 256 30927 45701 962998 679762 32768 512 33654 59398 314179 747516 65536 4