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 22:44:22 2026 Auto Mode Machine = Linux oleg627-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-oleg627-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 2433 12000 587635 503814 64 8 2267 23436 481234 688639 64 16 1671 10673 1066042 524487 64 32 5029 51406 471099 1066042 64 64 1808 11845 771797 1638743 128 4 2038 8602 637004 331646 128 8 2814 9109 216934 735635 128 16 5215 17410 372102 998261 128 32 5574 32561 1359835 488594 128 64 7245 64036 1424795 1363288 128 128 8320 52434 1663139 1827299 256 4 4842 6894 283174 135799 256 8 7266 20229 369388 31078 256 16 5842 13339 1137672 999940 256 32 6023 21062 1243036 996229 256 64 9141 42091 1230218 944525 256 128 12651 74659 1673001 1718521 256 256 6040 118963 439193 2242541 512 4 4049 7961 230743 597385 512 8 8108 16336 600895 623578 512 16 15955 7753 760762 303668 512 32 23819 55208 765371 1153441 512 64 16062 84001 1497750 1316016 512 128 19446 57793 1542947 1433753 512 256 21953 91262 1747618 1734911 512 512 23175 54485 867738 2178404 1024 4 4851 5783 476276 525069 1024 8 9720 14784 696126 315764 1024 16 12159 14372 508171 546377 1024 32 24446 22184 147574 1163693 1024 64 26309 60179 1525848 844168 1024 128 12074 33580 1510819 825827 1024 256 27247 46636 514317 933322 1024 512 13954 29154 1473500 420712 2048 4 4161 3074 254088 210157 2048 8 13579 15615 521651 803112 2048 16 23621 27332 343229 363705 2048 32 23637 16129 716795 674789 2048 64 40530 66150 1515833 1292923 2048 128 28851 32161 1573015 806051 2048 256 43088 29109 795894 176657 2048 512 36453 88226 1189938 1630338 4096 4 4790 6227 235618 144504 4096 8 6770 12376 395714 225588 4096 16 12102 20891 486353 691905 4096 32 13148 20103 342755 252575 4096 64 14892 26215 380070 251333 4096 128 35976 47142 829312 304171 4096 256 32714 30226 876890 1243133 4096 512 32766 44816 515156 405503 8192 4 5997 9225 2559 248054 8192 8 11330 12224 255832 561251 8192 16 17873 17937 555651 387655 8192 32 27872 26679 713585 662895 8192 64 25571 14644 283057 352466 8192 128 20010 19502 438285 265062 8192 256 24423 26302 484104 411179 8192 512 52235 32559 397305 212393 16384 4 3018 2997 186148 152940 16384 8 6698 8182 592553 360452 16384 16 11457 11456 369158 242195 16384 32 12799 19761 720527 476557 16384 64 18068 20081 932183 790662 16384 128 18355 25511 408434 369799 16384 256 21061 23801 555956 468515 16384 512 17806 30926 871159 616634 32768 4 4034 4369 249019 189570 32768 8