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 Oct 2 08:48:37 2026 Auto Mode Machine = Linux oleg313-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-oleg313-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 4155 3083 615952 512471 64 8 2335 11751 842003 444572 64 16 1496 8384 1168097 1049372 64 32 3458 46677 1210227 809014 64 64 3567 74239 459802 1336792 128 4 2480 12040 403721 427851 128 8 3014 12835 976473 761728 128 16 5324 11459 1024942 731625 128 32 2699 30352 1436229 1123617 128 64 4182 43244 1085013 1102844 128 128 3424 67018 780556 1093856 256 4 6666 9548 652807 563997 256 8 8778 12757 19730 802014 256 16 3439 8035 1985448 1016025 256 32 11233 19906 453092 1180188 256 64 7313 55956 1376935 1260547 256 128 10114 100898 1420658 1430119 256 256 23308 78290 850956 1062263 512 4 5041 7810 354323 583110 512 8 10121 15065 441795 407661 512 16 23747 34827 1113374 722133 512 32 28697 19992 2196227 589837 512 64 13462 72915 1417662 1279935 512 128 16360 47338 1361920 1322500 512 256 15195 41591 870905 727268 512 512 7177 34932 255597 1650887 1024 4 3272 7907 658151 230061 1024 8 6867 13671 662312 421041 1024 16 16523 36489 1140517 1054806 1024 32 21638 24620 1192117 1015885 1024 64 15568 36996 912695 559910 1024 128 21689 25586 651067 1016847 1024 256 15197 40356 287138 566035 1024 512 11875 74931 1774189 656441 2048 4 8990 8587 675478 400242 2048 8 12670 21798 423049 459408 2048 16 8892 21354 1148570 995610 2048 32 20068 32399 1185177 1199074 2048 64 21723 42973 836589 1211077 2048 128 30310 34259 1190598 1368956 2048 256 48340 107202 936967 1418228 2048 512 35333 76761 858666 593440 4096 4 5771 8374 215203 223740 4096 8 11548 14622 512192 412701 4096 16 22162 23462 454544 528598 4096 32 22963 37395 671355 462934 4096 64 18504 38570 855451 509715 4096 128 33173 44876 1605024 643421 4096 256 24283 48162 1124940 951223 4096 512 24502 49567 438734 452652 8192 4 6689 7060 251164 269846 8192 8 18315 16657 288592 323474 8192 16 24400 2910 567781 309411 8192 32 23730 26104 772687 582893 8192 64 31945 29969 557355 743173 8192 128 31648 35520 1494889 583934 8192 256 26336 40068 1112440 476723 8192 512 42495 42378 569003 369690 16384 4 5003 4740 290780 120759 16384 8 10949 13778 317083 271870 16384 16 22283 26483 1114024 558818 16384 32 30748 21743 897404 454530 16384 64 27236 24118 1171292 961275 16384 128 26031 37588 519269 447197 16384 256 46013 41146 880863 495780 16384 512 40200 33634 878307 408507 32768 4 7457 9741 408343 231407 32768 8 11139 11106 313383 250955 32768 16 13739 17519 320419 464946 32768 32 21246 25250 637942 348580 32768 64 25071 46374 1486424 1271360 32768 128 34391 33488 1194697 742869 32768 256 48536 65711 1669025 1136913 32768 512 46711 55918 832051 712499 65536 4