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: Fri Aug 21 22:22:10 2026 Auto Mode Machine = Linux oleg450-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-oleg450-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 1447 5451 666414 581273 64 8 2454 5856 743988 484710 64 16 2358 37319 969761 703068 64 32 2256 31779 916769 259156 64 64 2654 34061 1363961 1188789 128 4 3163 6923 475609 526961 128 8 5427 18593 780556 377597 128 16 7101 34408 408949 718889 128 32 2784 14031 789741 653282 128 64 10096 25968 1057236 1102844 128 128 6156 47318 1471662 1557024 256 4 3989 10291 554101 346837 256 8 9679 19313 794889 471393 256 16 12044 36844 530031 750445 256 32 9040 41626 543445 646518 256 64 11655 40914 1128110 93983 256 128 7710 20462 1461259 1132871 256 256 12945 49863 1619994 1842366 512 4 4828 6135 678122 572081 512 8 5639 12316 57097 468902 512 16 15657 11131 406658 817837 512 32 19818 44794 966113 749608 512 64 12220 36129 716112 1264113 512 128 13847 33156 368869 590648 512 256 15111 34813 363130 1233614 512 512 21562 28539 1467055 671759 1024 4 4057 4727 599537 149162 1024 8 7595 20325 705271 739389 1024 16 7352 12011 168062 471673 1024 32 8241 17313 1117955 827737 1024 64 23272 35983 601636 896689 1024 128 15528 28785 1370965 339313 1024 256 12814 23389 383657 790125 1024 512 24453 51586 1711956 987392 2048 4 5854 9359 228165 181448 2048 8 8325 8902 791713 316238 2048 16 12492 28585 690242 650318 2048 32 16706 30574 215985 341958 2048 64 14459 26973 437596 386050 2048 128 17705 34740 518878 503814 2048 256 34398 46735 997112 1275264 2048 512 21099 37874 776329 546440 4096 4 4848 5860 219739 258799 4096 8 8762 8249 454400 186827 4096 16 15430 11804 597855 364051 4096 32 18556 22581 224697 576819 4096 64 25452 34812 664629 579504 4096 128 31723 47259 634252 746762 4096 256 22766 38548 614185 431386 4096 512 20066 33479 511994 745822 8192 4 1947 5790 201411 232192 8192 8 9477 8079 233983 345203 8192 16 10480 13858 385251 196465 8192 32 16389 23022 659954 518029 8192 64 19070 26215 947494 509419 8192 128 18787 39320 372738 330761 8192 256 24272 40556 813579 531359 8192 512 22828 52372 651767 601243 16384 4 5233 7071 168367 246383 16384 8 8231 12195 495926 396564 16384 16 10512 15043 201892 197193 16384 32 22048 35775 226129 575680 16384 64 15556 20200 284701 535808 16384 128 13183 35934 1143650 663912 16384 256 32093 18925 420792 500977 16384 512 17276 23373 448605 968209 32768 4 6308 7174 268172 140987 32768 8 6996 8307 629161 188066 32768 16