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: Sat Aug 15 14:58:41 2026 Auto Mode Machine = Linux oleg641-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-oleg641-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 2266 8118 608965 576282 64 8 4302 7078 57867 752329 64 16 7534 10770 1066042 913649 64 32 3252 35754 1087638 1033216 64 64 3852 69654 1562436 1279447 128 4 3130 4907 138090 462100 128 8 8369 16424 907174 45165 128 16 5128 12468 1133103 479432 128 32 4262 17682 1266785 1093856 128 64 9131 45583 1421023 294853 128 128 11119 58933 1085013 1858934 256 4 4074 11481 663292 114242 256 8 8434 6770 792543 844929 256 16 9385 24026 744204 755195 256 32 9621 21458 844929 357460 256 64 12268 53364 944525 193230 256 128 10179 25887 276466 1561112 256 256 23956 72541 1707589 1802167 512 4 5148 6695 359062 422084 512 8 6195 8441 560144 395936 512 16 22610 34108 639169 771143 512 32 11837 25272 1155924 1303238 512 64 23690 42659 719230 1010197 512 128 24100 27587 112035 1276891 512 256 14859 51461 1718254 1700565 512 512 23796 31990 652967 202768 1024 4 3376 6891 165778 358786 1024 8 10995 11698 319784 306044 1024 16 16564 34385 1073257 521942 1024 32 25609 35178 881958 975285 1024 64 29301 62102 1404591 730958 1024 128 18741 29691 603411 793775 1024 256 23138 47910 1111877 849848 1024 512 42279 118518 1391395 1317957 2048 4 10004 4585 392417 356979 2048 8 13086 16515 422966 801538 2048 16 20042 27253 695890 661486 2048 32 27848 33071 296974 557433 2048 64 35839 48899 863066 523240 2048 128 30666 49752 1240458 532484 2048 256 43194 62053 1635615 236189 2048 512 34154 76632 510733 765877 4096 4 8170 8853 427245 256432 4096 8 15455 19658 700881 385650 4096 16 15400 21910 355765 318382 4096 32 22119 23472 603950 726642 4096 64 24926 41189 473851 699568 4096 128 30300 39651 651398 412196 4096 256 30212 52909 1527669 855664 4096 512 36866 47399 394035 662016 8192 4 2348 8226 282540 249559 8192 8 12955 16720 775163 231975 8192 16 17357 26713 436836 612387 8192 32 28747 34610 913997 659156 8192 64 24731 39117 1027602 635375 8192 128 35659 49999 966170 507748 8192 256 47926 58061 713156 389911 8192 512 39915 59627 896774 669222 16384 4 6662 7156 615320 334696 16384 8 10933 12446 482550 384006 16384 16 14824 19427 691921 406004 16384 32 34029 31946 647766 393515 16384 64 38652 42381 904741 545133 16384 128 42379 46924 485078 860598 16384 256 43816 65757 713962 678370 16384 512 47762 78703 1233547 967010 32768 4 6338 5733 327434 393293 32768 8 11182 13345 632697 399536 32768 16 21989 18723 633371 407324 32768 32 24122 32142 906172 766895 32768 64 28978 34066 629198 742532 32768 128 35317 40242 1035003 1037777 32768 256 46644 74720 890218 649384 32768 512