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: Thu Jun 11 20:46:51 2026 Auto Mode Machine = Linux oleg624-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-oleg624-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 4431 14411 1083249 576282 64 8 4311 19825 799377 1124074 64 16 4539 27247 1087638 718114 64 32 5116 47054 542506 1017549 64 64 5866 93570 1255511 1879725 128 4 6632 16014 666253 529038 128 8 11217 16815 1421023 831319 128 16 14997 51633 1269781 680612 128 32 16480 74806 2098744 883293 128 64 8991 99849 1165070 1231904 128 128 11012 101033 1421023 1710838 256 4 8829 14382 639967 495084 256 8 13184 26350 914752 684432 256 16 17260 41045 1369908 977189 256 32 18599 58566 1099237 802614 256 64 20690 83821 1755037 1153561 256 128 21075 91004 1471270 1639786 256 256 20001 79851 1540948 1743637 512 4 11657 15186 465447 536092 512 8 18425 25744 1110496 812884 512 16 24837 46541 1195832 988345 512 32 29389 74246 1300082 1322500 512 64 23745 76031 1463057 1475116 512 128 24332 85262 1153441 532767 512 256 26264 123285 1560891 1556366 512 512 33916 129002 1875849 1999881 1024 4 11810 15244 659363 476012 1024 8 13650 15276 744257 748538 1024 16 22138 48050 552918 638770 1024 32 21684 37429 974400 553275 1024 64 51620 102125 1464956 900637 1024 128 48457 59876 1079190 1078106 1024 256 39024 124727 1558516 1446698 1024 512 57120 130996 1471481 1627617 2048 4 13038 15231 755703 631111 2048 8 20032 27114 877795 893964 2048 16 32084 46988 1351935 719376 2048 32 40657 70766 1166982 1311078 2048 64 45071 77642 1290592 1388428 2048 128 54640 88596 1606254 1343057 2048 256 65020 121978 1828499 1709505 2048 512 69648 126991 1773385 1595217 4096 4 14877 16394 698005 690736 4096 8 23935 27753 639303 606274 4096 16 34933 36773 794268 632314 4096 32 44696 70726 1335935 671697 4096 64 64748 74967 1314067 870933 4096 128 49470 101769 1704554 1042227 4096 256 72872 111431 1381039 965117 4096 512 64054 80455 1286514 1177364 8192 4 13967 14751 427446 376694 8192 8 22748 26056 798213 556407 8192 16