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 Aug 10 18:37:59 2026 Auto Mode Machine = Linux oleg353-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-oleg353-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 6471 14178 659861 640954 64 8 6467 24825 889431 789967 64 16 7672 36547 1143223 246089 64 32 9922 50909 1330167 852702 64 64 8580 80398 942521 1638743 128 4 2381 14305 568836 460120 128 8 8077 27686 983630 655675 128 16 14298 37143 1121270 69114 128 32 11175 16640 1363288 524387 128 64 6095 83277 1526043 284388 128 128 13291 81015 418187 1598754 256 4 10843 14452 592636 492360 256 8 14486 17178 934659 520524 256 16 8936 45445 1036624 937924 256 32 21563 51707 1924938 716876 256 64 5269 94671 984356 455398 256 128 25411 89390 1588832 1642294 256 256 18887 107108 1011241 1540948 512 4 10280 10143 154630 90489 512 8 17400 26158 419692 195870 512 16 23306 14255 351654 687237 512 32 7446 17222 1021732 932550 512 64 10027 69583 1038532 906185 512 128 34573 13633 1537424 759685 512 256 14705 131854 804962 1062161 512 512 31166 105414 1801873 2007358 1024 4 11640 10069 527585 157516 1024 8 4603 22378 616844 571762 1024 16 17374 31999 452301 807657 1024 32 23863 53663 245387 377320 1024 64 18146 89503 831905 400769 1024 128 10996 72835 1333093 935151 1024 256 32437 118902 1104727 1670669 1024 512 54346 105686 349844 929082 2048 4 9175 10412 223412 156252 2048 8 13813 20210 595167 642391 2048 16 17294 32632 914328 848321 2048 32 35306 61692 922973 651601 2048 64 26646 40197 911417 774579 2048 128 43401 43696 1545562 829480 2048 256 23950 115465 511737 1002465 2048 512 26919 88153 667344 1008468 4096 4 7457 8912 359014 368747 4096 8 16702 17117 324051 738702 4096 16 17016 17784 273065 886162 4096 32 14147 57348 1232609 977583 4096 64 17524 31135 1283151 1200146 4096 128 35109 32511 1405213 333817 4096 256 34753 36639 1023232 487444 4096 512 35413 60085 417830 511430 8192 4 7554 6599 130958 325247 8192 8 13381 13717 224894 197922 8192 16 21024 15057 989258 853598 8192 32 16181 30861 1418780 969250 8192 64 32768 38902 1326435 726824 8192 128 34847 67878 1125264 1077756 8192 256 46653 32162 905280 1079449 8192 512 50913 97442 1544826 760561 16384 4 4242 7882 394224 192932 16384 8 9978 17329 867573 675629 16384 16 16186 20750 745340 563427 16384 32 15519 38646 1200910 932867 16384 64 27638 42189 1227269 932449 16384 128 29098 55238 1208173 1184414 16384 256 33661 61585 1081739 883717 16384 512 73801 46353 1547847 1046710 32768 4 7674 7212 461197 306959 32768 8 13710 13928 861838 448471 32768 16 19862 18912 614609 538151 32768 32 23605 29988 724859 866735 32768 64 38344 39711 1148705 645269 32768 128 33004 47666 1186723 453850 32768 256 34568 42307 444083 1291394 32768 512