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: Wed Sep 2 19:16:03 2026 Auto Mode Machine = Linux oleg152-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-oleg152-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 2795 7934 532815 512471 64 8 6790 30418 780776 426897 64 16 7171 48229 1124074 1638743 64 32 5991 35517 1163036 866463 64 64 5821 56995 1562436 1648808 128 4 6016 12301 640042 554157 128 8 6079 21812 841746 650117 128 16 10375 50754 1142750 859260 128 32 12141 50430 1133103 942199 128 64 15164 59069 1048974 1455701 128 128 16664 76003 1451764 953918 256 4 12286 8847 742146 266648 256 8 11783 6986 882426 173077 256 16 19501 41660 1066483 937924 256 32 21045 27947 1300235 1012194 256 64 8909 106842 1312954 1219045 256 128 22370 81320 970126 1561112 256 256 15470 104787 1237306 389064 512 4 10014 9322 150364 576690 512 8 19025 22188 516122 581846 512 16 15524 29713 1139970 735740 512 32 16457 59897 1296159 1112797 512 64 25835 60648 1450212 816283 512 128 28007 99513 1368865 958781 512 256 16363 69433 1630828 1647088 512 512 21025 57103 1280699 1938502 1024 4 4170 4378 590876 564770 1024 8 10750 15153 581437 889815 1024 16 29393 26744 1256644 482591 1024 32 15514 33334 1267024 1625154 1024 64 29317 60829 753925 1014925 1024 128 38917 92570 1490373 880512 1024 256 54128 158932 2290886 1426043 1024 512 52043 106522 1479591 1089317 2048 4 9806 10981 188393 286830 2048 8 16549 20484 942002 571412 2048 16 22729 36510 1445434 601291 2048 32 28783 43371 944695 351530 2048 64 32738 48557 1420339 719617 2048 128 47956 32291 240259 411655 2048 256 26815 67794 715302 615377 2048 512 31116 31900 1607456 433620 4096 4 9438 6234 319377 178126 4096 8 14751 17498 356179 573986 4096 16 22415 24812 308780 232449 4096 32 29505 19782 1485787 713218 4096 64 22591 51381 975917 303382 4096 128 20908 31789 527300 419760 4096 256 34368 55626 879719 828992 4096 512 33366 52915 2012682 1849125 8192 4 5820 2207 479624 502050 8192 8 10499 13225 453648 375299 8192 16 19516 20061 358871 544754 8192 32 22814 38898 704861 462198 8192 64 27376 46568 759217 652547 8192 128 31810 40864 1147972 898134 8192 256 37592 48389 736893 710987 8192 512 37665 56334 1071671 474786 16384 4 6183 8382 256842 211035 16384 8 11906 16327 648438 371585 16384 16 22974 21855 683009 670729 16384 32 36746 32739 453145 573370 16384 64 39271 34818 1573867 1215804 16384 128 36915 47197 989370 765900 16384 256 45793 59667 1387072 1020048 16384 512 43059 81491 1247272 937346 32768 4 7885 9253 399727 440140 32768 8 16368 16355 703581 520730 32768 16 21354 27417 936712 911817 32768 32 27802 43932 861341 826492 32768 64 28756 40581 663671 684191 32768 128 36287 55371 1098748 749583 32768 256 37299 62551 765967 1156165 32768 512 48024 69243 1679981 1268603 65536 4