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: Thu Aug 27 08:58:34 2026 Auto Mode Machine = Linux oleg448-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-oleg448-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 3777 13867 235303 467002 64 8 2093 10507 821391 598110 64 16 2631 17822 942521 752329 64 32 4624 26100 1033216 913649 64 64 2302 22046 969761 599446 128 4 3844 13141 185268 425478 128 8 4320 12427 914904 549618 128 16 6304 24705 902598 247656 128 32 5223 50951 1114289 927549 128 64 6837 27879 633995 352553 128 128 2924 33118 870405 1145188 256 4 9133 10872 550691 198443 256 8 4410 10522 581719 511109 256 16 11692 16167 431775 766517 256 32 10350 35290 1195962 962301 256 64 9629 56839 340027 526652 256 128 6819 113075 1384034 1173737 256 256 6062 75782 1543163 2131261 512 4 8944 10419 370779 509993 512 8 9687 10364 542320 465447 512 16 5716 6605 469723 803757 512 32 6187 32833 1230081 787834 512 64 12838 34454 1233614 1105920 512 128 22512 56437 706221 585814 512 256 8546 15088 1541840 1376763 512 512 26779 100845 684390 545350 1024 4 4002 6319 326866 173823 1024 8 6464 7396 533019 185673 1024 16 12105 14471 300288 273063 1024 32 10849 32399 1083546 262628 1024 64 14255 43489 298971 1041505 1024 128 19180 33493 627845 321700 1024 256 17383 77102 1117955 1140214 1024 512 26674 73289 1501313 59988 2048 4 8545 9291 372167 240939 2048 8 8387 8790 347295 412723 2048 16 11462 17396 390100 681102 2048 32 18586 19963 1422220 610783 2048 64 23785 41787 1522820 722097 2048 128 29650 42155 575933 1078486 2048 256 29838 97738 288739 377798 2048 512 22772 41056 459089 1041733 4096 4 8096 6104 422392 211078 4096 8 8829 9593 616587 452699 4096 16 11119 19162 514308 385433 4096 32 21970 33155 858701 701625 4096 64 17517 35349 989577 481137 4096 128 25133 29666 516846 367422 4096 256 25622 38221 674677 373623 4096 512 26391 54115 771650 470001 8192 4 10253 6167 452519 234749 8192 8 8461 21024 343247 195671 8192 16 24939 28221 622822 489337 8192 32 19347 29815 891307 634004 8192 64 26142 27647 326635 274016 8192 128 35063 46549 521085 629232 8192 256 27557 37751 783613 549687 8192 512 30871 54639 551018 670161 16384 4 7916 6575 247720 222156 16384 8 12425 13362 544300 238119 16384 16 19912 20335 459192 945627 16384 32 41305 49276 1295181 465822 16384 64 28084 27834 518301 510133 16384 128 24227 36852 1040513 852675 16384 256 33554 57975 952719 483661 16384 512 44119 67145 1122100 563196 32768 4 7924 5655 379097 371266 32768 8 9403 7793 463747 330122 32768 16