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: Mon Aug 17 02:54:37 2026 Auto Mode Machine = Linux oleg343-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-oleg343-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 4410 10531 591520 546928 64 8 4554 10958 771797 621657 64 16 3218 8770 172095 236131 64 32 3578 12470 1163036 1484662 64 64 6642 32144 1484662 1518251 128 4 6910 4504 627328 230238 128 8 4951 24960 1032829 785122 128 16 14132 30620 826202 386570 128 32 13707 42881 663782 341345 128 64 2739 7843 978253 1065630 128 128 16443 107464 1406136 1642783 256 4 5777 3423 748353 353110 256 8 7223 19725 599251 651619 256 16 9628 50088 755195 785010 256 32 9190 27078 472430 927393 256 64 23618 97120 1376935 615393 256 128 9487 32507 1304976 668662 256 256 7345 64016 1570244 2049885 512 4 2318 2495 310652 191828 512 8 14285 5083 111425 532239 512 16 7107 14950 84351 105244 512 32 9880 39662 266940 912733 512 64 22310 23765 621233 59177 512 128 16421 47144 455186 1028091 512 256 11706 84854 1741948 1616100 512 512 18629 29036 1155302 2169601 1024 4 1592 6643 612097 526485 1024 8 6921 18343 737231 512232 1024 16 13207 26388 1003777 374654 1024 32 9163 17065 1105865 136770 1024 64 40538 31586 1196434 518978 1024 128 25819 24076 126718 500531 1024 256 12770 54537 631259 859886 1024 512 17546 101056 252395 370997 2048 4 4744 5852 220856 333553 2048 8 8133 12826 311242 278597 2048 16 19536 28641 322665 551846 2048 32 22271 37040 196337 607887 2048 64 21896 33552 678145 447956 2048 128 29791 41887 684249 186945 2048 256 26752 34284 868915 803412 2048 512 22794 40937 685888 802212 4096 4 5751 5379 221176 362323 4096 8 8471 7768 459234 307735 4096 16 13750 23151 722395 592066 4096 32 16734 22231 640303 643011 4096 64 23961 27841 1562117 567239 4096 128 40554 31481 508448 429939 4096 256 30129 56114 234781 205128 4096 512 24290 63838 704156 625431 8192 4 5655 6455 121248 233689 8192 8 7144 7409 188379 203710 8192 16 10881 20482 657366 338807 8192 32 18175 16019 413779 425471 8192 64 25280 20047 445797 154025 8192 128 18076 38296 288939 543195 8192 256 24234 31792 808049 304217 8192 512 22049 43362 961278 383253 16384 4 4478 5370 196203 333061 16384 8 8692 11877 316555 243436 16384 16 18989 19024 562813 282624 16384 32 32081 21335 777380 767542 16384 64 26669 58185 625844 493079 16384 128 31359 62447 815208 709356 16384 256 41778 50788 744218 735173 16384 512 42002 66961 571173 787428 32768 4 5966 6801 231381 250569 32768 8