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 13 09:36:44 2026 Auto Mode Machine = Linux oleg352-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-oleg352-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 1649 14321 340738 467002 64 8 2641 8576 746056 516414 64 16 6702 19376 969761 577521 64 32 3118 37824 1013707 901377 64 64 3551 41722 1083249 1947927 128 4 3072 7466 153487 595328 128 8 7152 12469 877518 192509 128 16 15415 51489 1319723 1007629 128 32 4235 68707 1424795 1206978 128 64 8469 69302 1373754 1229084 128 128 15839 99075 1526043 666253 256 4 9336 9961 560172 800221 256 8 7108 22091 130676 644965 256 16 16215 45221 921029 353576 256 32 9217 46555 402481 436870 256 64 16109 78262 723153 833776 256 128 21345 64047 1610276 1445521 256 256 27944 27260 1814348 958864 512 4 8201 6155 679840 483470 512 8 11857 20666 853596 115339 512 16 17026 31890 595397 1098566 512 32 15271 29445 920953 973118 512 64 20064 45062 1187895 1293037 512 128 13590 36225 702295 647260 512 256 30140 40239 1111070 881269 512 512 46201 47346 1778004 260149 1024 4 4710 6314 634429 103801 1024 8 5999 19365 247579 280390 1024 16 18655 14304 591201 363124 1024 32 32968 36920 762491 331049 1024 64 38959 35479 202413 125320 1024 128 25166 61334 167563 111592 1024 256 30582 58076 310401 473441 1024 512 15746 54500 1006836 935151 2048 4 7093 8964 479273 375634 2048 8 8901 13197 495159 491251 2048 16 20573 16114 304534 328363 2048 32 15920 33550 1394966 206306 2048 64 29299 67158 715302 516538 2048 128 32662 51945 612962 433423 2048 256 24494 79750 940249 733567 2048 512 36074 66209 815928 731942 4096 4 8050 6904 372602 302762 4096 8 13939 13733 660743 286575 4096 16 12336 11238 357416 313817 4096 32 18048 29351 938595 273104 4096 64 27548 42572 361903 313051 4096 128 42819 57399 1221566 809500 4096 256 32318 55175 1708113 623072 4096 512 29478 53610 1237047 1818782 8192 4 8735 7207 288369 213011 8192 8 11876 11147 443650 415580 8192 16 20054 19619 462509 678539 8192 32 21063 31650 703000 636364 8192 64 26434 43875 951561 659751 8192 128 27491 38467 550426 888105 8192 256 38319 50291 567349 461187 8192 512 42314 56977 1177033 1267521 16384 4 7284 6808 321702 337801 16384 8 10049 13078 558650 256244 16384 16 20824 24566 822290 702848 16384 32 22437 26905 1417545 769812 16384 64 26283 39949 862174 529161 16384 128 39037 53372 1252683 974539 16384 256 39052 53050 955116 697278 16384 512 31273 52434 340885 354012 32768 4 6244 8256 253183 281069 32768 8 14756 15006 340227 512633 32768 16 14155 20501 403597 1062068 32768 32 19025 31759 535818 862314 32768 64 24745 24894 486966 897016 32768 128 22364 27145