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 Jan 30 01:14:52 2026 Auto Mode Machine = Linux oleg651-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-oleg651-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 2882 8487 288390 107554 64 8 1856 26745 435202 12269 64 16 1975 6176 673098 488236 64 32 1872 38910 842003 576282 64 64 4241 35302 852702 1484662 128 4 2342 4082 251484 158799 128 8 4443 22767 215454 337695 128 16 8625 46648 748976 990891 128 32 6708 12239 927549 853794 128 64 7557 26970 767171 185780 128 128 7420 69680 1254941 2727923 256 4 4992 10045 166994 347848 256 8 4278 5723 417667 95023 256 16 9927 30876 731528 338633 256 32 19311 9379 947860 753077 256 64 13113 29068 1132871 773140 256 128 15976 53444 1422540 1384034 256 256 15569 74139 1168627 1814348 512 4 6738 10069 131789 65650 512 8 9245 9240 111668 350964 512 16 13361 19229 662434 451930 512 32 9508 14570 164145 247696 512 64 16606 35099 730484 975328 512 128 24067 71810 1312798 1127995 512 256 18116 47609 301705 359302 512 512 24656 34056 625941 1938502 1024 4 4573 4857 81788 213024 1024 8 13545 20399 734081 466296 1024 16 15829 38685 383794 312843 1024 32 30434 44663 899129 794951 1024 64 6556 26072 165644 318598 1024 128 44525 104691 1931359 1448650 1024 256 46377 157510 1462960 2270300 1024 512 45569 99582 1765437 1540074 2048 4 12116 9802 130204 111675 2048 8 8773 16475 211024 217176 2048 16 41116 42326 1011913 722401 2048 32 30321 23274 1223496 394380 2048 64 21138 22217 456115 571260 2048 128 25604 37804 433992 409438 2048 256 37539 53444 484272 191279 2048 512 21421 55295 873333 577715 4096 4 9806 9032 63599 82191 4096 8 9779 27455 293052 256301 4096 16 21817 14238 162585 247656 4096 32 17961 17474 506933 167429 4096 64 26763 39278 589182 251720 4096 128 28868 66544 1444802 1133699 4096 256 40367 64653 796293 917149 4096 512 26406 76380 1745956 1495878 8192 4 10206 10023 166948 151383 8192 8 12497 11877 234104 196936 8192 16 14617 17153 229346 132483 8192 32 20438 23427 447428 394908 8192 64 22763 33149 788667 468277 8192 128 26959 39874 440076 223051 8192 256 23061 77029 454254 147952 8192 512 42611 57719 770781 626684 16384 4 5974 4579 92335 75268 16384 8 6283 9181 165581 149532 16384 16 11034 14361 193589 173888 16384 32 17939 15190 230319 168268 16384 64 15574 32050 546899 599067 16384 128 16476 19083 214194 211360 16384 256 17881 30716 573772 512369 16384 512 18187 30531 948537 384249 32768 4 4306 8305 182910 144347 32768 8 17846 12935 164817 187319 32768 16 18412 15958 217282 188391 32768 32 19465 22607 507127 437454 32768 64