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 Dec 5 07:30:20 2025 Auto Mode Machine = Linux oleg603-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-oleg603-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 2607 6176 566551 538156 64 8 2741 29156 771797 633392 64 16 6106 44079 863676 614542 64 32 4412 49804 1083249 929467 64 64 6747 74590 1101022 1679761 128 4 3836 13954 496272 464097 128 8 6779 13840 592699 680612 128 16 7994 47922 192164 354649 128 32 5991 37221 1085013 962469 128 64 5439 84389 1229084 1254941 128 128 12294 84389 978253 1755594 256 4 11259 18863 595594 117647 256 8 10094 7356 35850 727070 256 16 9236 53884 980760 36312 256 32 9575 40200 1300235 83795 256 64 13831 85592 965763 1163562 256 128 17843 102068 1142514 1471270 256 256 14287 118792 1471270 2015259 512 4 6289 14473 559560 490875 512 8 16738 24796 856319 846197 512 16 21392 32118 1096322 438368 512 32 21989 72460 1350783 761841 512 64 16648 44226 1042566 990625 512 128 9000 104664 1308798 1463057 512 256 20897 112925 1551867 719954 512 512 16008 28625 1635797 1803387 1024 4 6540 4852 545822 625194 1024 8 9008 9432 696578 846998 1024 16 30123 11466 301616 1019987 1024 32 29763 72001 1365299 516668 1024 64 15999 39006 646461 612795 1024 128 51304 111851 1762539 1429841 1024 256 34862 117135 1750329 1460472 1024 512 18383 58129 1678504 1590254 2048 4 11556 10045 460640 387880 2048 8 7068 13551 918826 810462 2048 16 34860 30248 484600 1003871 2048 32 18990 70781 964207 1101724 2048 64 44339 37051 1294482 356861 2048 128 58279 65264 1347270 1235285 2048 256 42126 80106 1400881 1332432 2048 512 36349 109256 728837 1343897 4096 4 8088 7437 201198 436061 4096 8 10538 14529 202133 223153 4096 16 29074 18691 291071 228583 4096 32 36937 52507 566453 426227 4096 64 56259 77661 1228554 1132429 4096 128 42065 105431 297972 1182144 4096 256 38838 44063 1469645 1262315 4096 512 57310 83973 1201153 661710 8192 4 7762 6854 194007 146121 8192 8 2355 11810 539909 674119 8192 16 24923 24473 878680 691944 8192 32 23848 26821 1027325 989002 8192 64 42469 54650 1078466 1003678 8192 128 26165 68421 1155889 398522 8192 256 44080 43021 1097516 512672 8192 512 38337 48122 580001 1005646 16384 4 8733 10841 248141 231001 16384 8 11493 19609 883615 663156 16384 16 18648 23740 554377 453561 16384 32 26096 28866 1134943 987876 16384 64 39171 40091 1151295 779779 16384 128 38247 42040 438531 396860 16384 256 35934 47760 666475 1175419 16384 512 50877 60642 749567 360564 32768 4 7539 11339 365811 484819 32768 8 19286 20531 488644 404843 32768 16 18810 25675 1146339 927902 32768 32 29089 50886 454510 519624 32768 64 40609 46935 1534142 395763 32768 128 37745 73113 1414915 1126938 32768 256 31502 65450 500320 591395 32768 512 39772 70950 1330898 1282201 65536 4