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 May 8 20:42:09 2026 Auto Mode Machine = Linux oleg336-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-oleg336-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 3326 7334 571375 179219 64 8 3501 2298 720041 19667 64 16 3022 14398 901377 863676 64 32 3227 6240 955947 952555 64 64 1923 40556 1518251 1392258 128 4 2886 5835 715059 103050 128 8 11196 18148 935631 831319 128 16 9159 49784 955616 831319 128 32 6516 23862 1377278 300464 128 64 8665 44833 369032 360605 128 128 13792 72561 1074159 927549 256 4 3801 2986 183363 602276 256 8 8484 26567 883152 817898 256 16 13266 32931 598249 525621 256 32 7665 12796 1479379 358534 256 64 13648 39288 1306564 1173737 256 128 11093 39167 1340826 1185399 256 256 7174 23000 1040643 342741 512 4 4275 5748 135021 396961 512 8 8834 11033 867738 810124 512 16 10686 10557 394772 1045103 512 32 19764 32738 1426135 1113374 512 64 15613 72316 1875849 1245780 512 128 21128 73446 1361920 360025 512 256 26138 85435 1574625 1216149 512 512 29927 53911 1455126 619978 1024 4 9581 7497 378551 542375 1024 8 12838 10655 926676 398760 1024 16 16849 15987 792604 1006836 1024 32 17480 33326 894262 827099 1024 64 22565 58877 991266 184874 1024 128 18819 83258 1607514 1239598 1024 256 19362 77971 1006836 1575091 1024 512 24722 91151 1648862 1052480 2048 4 6156 6486 243985 190228 2048 8 5825 8811 568087 261054 2048 16 19171 17624 444825 588682 2048 32 21168 26265 870324 474849 2048 64 24657 34533 1513696 214133 2048 128 25378 41727 432986 526318 2048 256 35816 56939 1450315 1334295 2048 512 42125 79722 1669307 1558461 4096 4 4361 6164 232029 292693 4096 8 7903 9519 346264 423057 4096 16 19984 21262 479177 680180 4096 32 22131 23364 872969 434089 4096 64 34211 39684 825288 834752 4096 128 32845 59277 713722 665272 4096 256 42487 54518 1485145 384381 4096 512 43535 58166 622666 814180 8192 4 7753 7295 479229 406125 8192 8 11664 13360 355290 398231 8192 16 19532 24233 904684 474183 8192 32 24086 35294 491951 761539 8192 64 25622 37652 788921 406490 8192 128 36253 46447 1133356 467926 8192 256 44185 50086 1667397 540334 8192 512 45448 70838 857069 736830 16384 4 6217 5804 225169 367205 16384 8 9140 11134 486792 563275 16384 16 15697 16325 514475 538044 16384 32 23971 29857 745574 640175 16384 64 28373 37358 907106 609702 16384 128 31312 49098 409037 451360 16384 256 29301 61040 1045627 867343 16384 512 35694 43944 484162 397505 32768 4 4542 5429 484103 459739 32768 8 8438 7418 640562 202267 32768 16