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 Jan 16 04:10:44 2026 Auto Mode Machine = Linux oleg227-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-oleg227-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 1266 1250 230060 206997 64 8 1693 21032 353294 329852 64 16 5602 25976 592827 394870 64 32 5049 70018 735831 688639 64 64 3493 96844 1143223 1188789 128 4 4162 10768 240554 121195 128 8 7932 17635 402510 372102 128 16 5133 37781 121551 237889 128 32 5395 22311 921183 727658 128 64 3912 102793 907174 1065630 128 128 16471 35281 378663 1492113 256 4 8005 11395 261709 321209 256 8 10864 9395 438296 194208 256 16 10112 29384 385433 101913 256 32 11103 33644 570288 505812 256 64 7495 72253 1422540 941213 256 128 9255 91066 1591186 1137672 256 256 17552 154122 1619994 1790149 512 4 6471 6707 29701 326921 512 8 12516 30108 451075 373163 512 16 8796 10674 579179 540002 512 32 17632 35215 615359 770037 512 64 41918 23257 514021 274831 512 128 25742 113648 374008 996139 512 256 19937 45205 57573 1302447 512 512 39376 130810 1729323 297855 1024 4 5777 11704 51636 23538 1024 8 10258 16344 434106 411245 1024 16 8116 18123 172566 130297 1024 32 20984 8318 202853 406650 1024 64 26505 43950 1014925 70644 1024 128 15416 19667 462929 648511 1024 256 12884 28365 785357 1317957 1024 512 44918 48815 1517224 794363 2048 4 2592 7524 43139 59935 2048 8 5870 18614 245210 196566 2048 16 19332 17901 461357 132856 2048 32 39307 21283 842083 160428 2048 64 16258 58661 891274 691910 2048 128 21596 54323 153222 1122162 2048 256 38398 58322 739313 934317 2048 512 20481 49249 1227869 926357 4096 4 3285 4913 117487 107880 4096 8 7451 9585 96905 114723 4096 16 14141 16526 373826 289102 4096 32 21445 28978 327230 402595 4096 64 22827 31546 1418791 630736 4096 128 25009 40084 564740 437839 4096 256 36736 104308 1435147 937059 4096 512 30810 29055 316074 1472795 8192 4 8996 8989 117968 104389 8192 8 10686 16828 235956 141739 8192 16 16113 18596 322581 278763 8192 32 23638 27899 500974 411159 8192 64 29569 34465 815355 802970 8192 128 29769 42019 838987 724250 8192 256 33086 60637 591737 541014 8192 512 30068 41360 744655 606539 16384 4 6065 7249 130867 128105 16384 8 12903 18922 177912 309008 16384 16 21219 18721 384701 360668 16384 32 16955 24190 536456 267027 16384 64 22037 27252 200418 247975 16384 128 28098 38598 363766 391859 16384 256 29766 39182 708128 800788 16384 512 34794 50262 731651 431601 32768 4 6759 5302 95103 134998 32768 8