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 15:23:09 2026 Auto Mode Machine = Linux oleg204-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-oleg204-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 2675 7156 105774 206997 64 8 3086 22590 718114 733819 64 16 6054 21284 1421755 1105556 64 32 2899 43741 1163036 1143223 64 64 5679 53157 1163036 1143223 128 4 6649 10234 218080 231828 128 8 9309 19866 630273 942199 128 16 3322 21610 976473 242949 128 32 12690 20765 976473 1017175 128 64 8866 58528 1229084 443033 128 128 6694 53822 1487977 2066432 256 4 8175 3150 132711 54691 256 8 10782 18281 397416 697776 256 16 7901 29502 755195 429530 256 32 18702 53545 1062263 870974 256 64 13394 54688 1280084 1487577 256 128 25444 107559 790209 357103 256 256 15557 50684 885337 1304976 512 4 4687 6780 97079 152522 512 8 9762 21017 134987 758612 512 16 21584 34768 1184618 890404 512 32 17290 19714 1302447 128003 512 64 17749 55773 736750 1454140 512 128 29929 70776 1556366 683518 512 256 22585 52309 1177473 1230786 512 512 19837 125519 625212 2438090 1024 4 9815 6381 294927 154802 1024 8 16390 8406 861266 661089 1024 16 7026 12925 454118 504945 1024 32 17737 20837 240199 591283 1024 64 25007 75210 1402756 416954 1024 128 36907 43811 1554004 1372717 1024 256 24938 100078 967813 1109293 1024 512 29788 81998 1125277 591935 2048 4 3550 8653 294712 347407 2048 8 12830 12752 453586 295442 2048 16 12652 19758 804767 989759 2048 32 24097 23382 400168 457646 2048 64 12644 38737 755437 552769 2048 128 17831 60618 991244 438826 2048 256 23018 43589 1529599 384529 2048 512 22276 35144 363705 1375532 4096 4 3497 4766 313290 151304 4096 8 7207 966 492304 494216 4096 16 8220 13965 826002 276586 4096 32 16745 51123 207161 208744 4096 64 63328 23499 656627 395933 4096 128 16537 26848 325285 180400 4096 256 18468 34570 508313 409563 4096 512 23531 27518 607710 374445 8192 4 2828 7197 542946 198425 8192 8 4375 6974 170855 143048 8192 16 15801 10822 216627 252372 8192 32 16027 20510 279811 403270 8192 64 20268 23843 410339 248129 8192 128 21168 34271 870576 753704 8192 256 34266 40899 894812 560977 8192 512 28867 47267 1087477 1076641 16384 4 5281 6628 308200 578959 16384 8 8428 11038 595542 267685 16384 16 15523 18193 592400 397659 16384 32 21575 28012 812375 582478 16384 64 22048 31924 888700 617726 16384 128 22859 33965 1124800 679463 16384 256 35451 44472 589159 667751 16384 512 34009 52620 986274 511664 32768 4 5710 5930 359984 329511 32768 8