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: Tue Jun 23 09:22:42 2026 Auto Mode Machine = Linux oleg357-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-oleg357-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 2547 5634 587635 423529 64 8 2837 3880 743988 653436 64 16 4662 11998 916769 752329 64 32 2195 41885 1204796 290890 64 64 1859 53872 673098 1518251 128 4 2748 8457 509943 134023 128 8 6536 6712 653282 669577 128 16 8091 17819 351630 785122 128 32 5149 36962 969421 947186 128 64 2380 20209 232733 283937 128 128 10948 53554 1281909 1637771 256 4 3178 3199 517265 126608 256 8 3881 18754 551540 721210 256 16 14116 19744 980760 785010 256 32 21404 27944 1280084 1084800 256 64 21958 69319 1339154 1266495 256 128 20543 106407 1321031 1362952 256 256 16957 108658 1552085 2061693 512 4 10285 10631 145702 148657 512 8 8498 10449 642419 664895 512 16 11584 30723 692780 213238 512 32 24509 22016 1316823 1014013 512 64 16818 29500 906185 1005938 512 128 23058 60937 355790 949875 512 256 22253 73883 861818 1454140 512 512 30638 39987 885631 1604029 1024 4 8670 9334 308174 335182 1024 8 13183 11267 226745 473441 1024 16 18217 19298 505897 902151 1024 32 28703 23989 783494 636498 1024 64 39964 53167 876022 1159609 1024 128 35886 37499 422782 1090423 1024 256 35865 79881 1322828 204680 1024 512 26891 79795 1559081 965203 2048 4 4208 8484 215104 272265 2048 8 7936 10466 559721 431789 2048 16 15896 14225 341727 426324 2048 32 15230 19293 360424 348238 2048 64 17011 39960 1356204 1154591 2048 128 35706 48258 1497076 1254956 2048 256 24846 29073 1502575 253773 2048 512 37747 32267 403400 539236 4096 4 4343 5307 464876 440715 4096 8 8794 10332 273980 198942 4096 16 14826 18697 836907 378521 4096 32 18717 23371 1371339 342646 4096 64 30141 24928 611083 465720 4096 128 30274 35032 281587 1298671 4096 256 25147 43645 1459656 720879 4096 512 24522 59236 937724 651720 8192 4 4886 4792 328584 231687 8192 8 6897 9182 262160 307148 8192 16 14632 14768 365763 533753 8192 32 18023 27535 496006 370880 8192 64 19569 33264 827231 404499 8192 128 22265 44055 883992 686442 8192 256 22820 44410 725534 506737 8192 512 23323 47432 908007 720106 16384 4 5602 5816 282453 190558 16384 8 8709 10819 643267 529145 16384 16 13041 16895 583125 468998 16384 32 15486 19064 496213 492871 16384 64 17224 24035 670376 493122 16384 128 31291 46443 973145 619927 16384 256 33130 42823 471440 445242 16384 512 20565 52223 537640 276024 32768 4 5727 5274 407486 205862 32768 8