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 Jul 3 23:27:33 2026 Auto Mode Machine = Linux oleg417-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-oleg417-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 2007 7130 603489 195111 64 8 1839 4272 799377 799377 64 16 1653 6350 889431 560635 64 32 2155 40971 1049372 1143223 64 64 2906 44688 557144 1947927 128 4 4605 2772 624409 110539 128 8 2544 8330 740710 617941 128 16 3521 14165 200638 785122 128 32 7779 15252 1015251 1017175 128 64 5427 63051 76697 1000121 128 128 4663 34233 1175271 1858934 256 4 3225 6508 395076 301544 256 8 3937 5986 513063 667000 256 16 3683 5885 260945 395659 256 32 7914 6499 870268 826078 256 64 4817 20358 85361 856386 256 128 11365 27285 1398455 265790 256 256 9557 51405 1202660 1881098 512 4 5627 4553 360812 625941 512 8 6844 8453 452310 631277 512 16 10751 20986 204001 572691 512 32 18544 44042 423499 251969 512 64 12380 19671 1028091 206790 512 128 18196 44290 1293037 1316823 512 256 20152 60598 749608 637461 512 512 12186 42913 782951 1182661 1024 4 4089 6179 222079 544093 1024 8 4792 8688 451683 246740 1024 16 10088 11684 101767 399985 1024 32 8520 17995 259502 277277 1024 64 18957 21671 982648 736725 1024 128 28828 72583 1359680 678102 1024 256 27346 32031 830618 151772 1024 512 21552 48258 1456510 1460969 2048 4 6176 4140 632691 99355 2048 8 6060 8215 749113 132385 2048 16 6297 11890 398442 192552 2048 32 12314 19538 562801 201217 2048 64 13049 26037 1254773 1047067 2048 128 27606 30283 874488 349428 2048 256 18077 33467 671256 899017 2048 512 21920 25939 1459680 621566 4096 4 3158 6809 134731 211122 4096 8 7811 9180 273613 199610 4096 16 11938 12710 265610 164709 4096 32 13076 14925 742823 415707 4096 64 24464 38269 367053 520069 4096 128 25819 21716 1513670 277337 4096 256 15217 24631 399914 362507 4096 512 24870 45168 436438 1449434 8192 4 3340 4963 617794 352281 8192 8 5982 10153 336300 399008 8192 16 10878 9850 460069 361613 8192 32 11541 13891 283020 244917 8192 64 26002 19310 835742 686963 8192 128 22820 43320 467849 311613 8192 256 22910 46613 449641 663202 8192 512 25596 53617 733715 290992 16384 4 6637 4824 203139 184983 16384 8 13409 11175 451004 353553 16384 16 26711 19230 352259 364776 16384 32 18757 25052 379821 382106 16384 64 20486 28857 494029 408925 16384 128 19781 25095 304280 477959 16384 256 31447 46931 445072 316875 16384 512 29715 41267 573226 398104 32768 4 5237 6001 237342 250510 32768 8