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: Wed Sep 2 11:00:50 2026 Auto Mode Machine = Linux oleg214-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-oleg214-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 4036 6352 97868 426897 64 8 5052 27352 365812 735831 64 16 7506 45452 913649 718114 64 32 3114 52885 1363961 1083249 64 64 3449 12190 1363961 1722886 128 4 5959 14573 630273 542400 128 8 7775 18854 1603529 718889 128 16 7870 36782 1076312 1196221 128 32 6228 74900 1858934 821147 128 64 6817 65234 1196221 229353 128 128 9203 27765 1618028 1732927 256 4 5303 7544 686620 992545 256 8 7386 37263 1142514 785584 256 16 11178 30851 2034350 1755037 256 32 24360 64189 1662639 927393 256 64 21772 32396 1070737 1911233 256 128 20516 127042 1384034 2081678 256 256 20017 102565 2187712 3557725 512 4 7412 6002 265160 442524 512 8 12122 19675 690108 586454 512 16 18742 34254 1145443 964378 512 32 13311 38223 955368 283017 512 64 14048 34291 1258188 1176828 512 128 27291 80061 1368865 1005938 512 256 19930 95969 500484 1216149 512 512 41806 58181 2521095 2116152 1024 4 7589 11117 639150 275569 1024 8 10181 15808 657244 398427 1024 16 19232 18399 755251 818431 1024 32 22738 34617 1151834 726752 1024 64 28587 46938 1572783 698959 1024 128 34890 56381 1351126 578851 1024 256 20916 75404 1354535 401556 1024 512 33449 91111 1226500 1501313 2048 4 8638 7454 302198 488430 2048 8 9046 19660 651403 232885 2048 16 23676 19103 527287 534605 2048 32 19042 39564 277544 850168 2048 64 33899 42620 716855 360303 2048 128 26867 40453 1224892 651206 2048 256 34229 79042 1853353 465887 2048 512 20237 92368 1544450 1189279 4096 4 8361 8268 315390 386848 4096 8 11785 15405 450704 796256 4096 16 31507 31757 542948 545985 4096 32 24400 43265 967454 1170625 4096 64 44458 83433 1402689 442999 4096 128 49344 67758 435100 1374960 4096 256 59772 71513 1440200 540641 4096 512 43525 88868 1143205 742855 8192 4 9211 9857 504683 347324 8192 8 13648 21681 574964 420123 8192 16 24270 24849 467709 774656 8192 32 26733 51451 1429166 600854 8192 64 41773 51953 569239 713156 8192 128 42344 57596 882947 777302 8192 256 49823 62454 741233 945850 8192 512 59565 57759 1293771 479176 16384 4 10459 11330 473252 472172 16384 8 17858 21082 707581 710001 16384 16 23458 23824 818909 522415 16384 32 33127 31111 868110 850890 16384 64 38400 51729 746968 587201 16384 128 37534 42053 752770 707734 16384 256 41873 61452 1128606 1109796 16384 512 48965 76284 1132045 1135731 32768 4 9478 10505 479429 428149 32768 8 18346 16210 629657 677456 32768 16 26663 30337 708836 584881 32768 32 36109 48200 1233601 837502 32768 64 46986 57427 838375 960938 32768 128 47652 57820 902524 1189877 32768 256 47785 68295 1222409 1012734 32768 512 63058 76238 1067778 1208384 65536 4 11258 11756 473981 490513 65536 8 16041 17783 893456 443677 65536 16 25138 28989 745066 566964 65536 32