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: Sun Nov 16 21:19:00 2025 Auto Mode Machine = Linux oleg102-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-oleg102-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 3521 15370 231050 212570 64 8 3952 25459 400168 318502 64 16 3767 38602 603489 388021 64 32 2197 47765 855419 811459 64 64 2366 66811 1163036 1183548 128 4 5086 5524 281850 244721 128 8 7180 13284 368779 438331 128 16 4022 39827 590094 58907 128 32 4190 50335 883293 785122 128 64 6012 70950 1032829 1111981 128 128 9144 81469 1294270 1526043 256 4 6634 13315 161518 229588 256 8 8308 23017 380381 325296 256 16 4137 18243 581719 123492 256 32 15161 59274 888266 576720 256 64 13941 73124 1067543 901693 256 128 17543 79402 1147398 1327564 256 256 6666 91852 352647 2152625 512 4 10394 11571 306223 219001 512 8 8441 7028 430978 426697 512 16 15498 44237 70641 569653 512 32 24243 61046 149704 753818 512 64 26277 69810 189009 919375 512 128 19458 37517 1414860 1242896 512 256 13707 116598 1383861 1471074 512 512 27869 127584 1458090 1961520 1024 4 8633 11539 229753 84725 1024 8 16299 12472 431706 448897 1024 16 10714 29901 553203 592261 1024 32 14127 18122 872995 696126 1024 64 31629 51879 500999 939446 1024 128 28469 52003 558672 189666 1024 256 29207 101356 697596 1356245 1024 512 19880 29842 1617808 1418039 2048 4 6494 7570 192066 93073 2048 8 20643 11291 355061 267851 2048 16 20227 19430 461258 201316 2048 32 21440 28737 882394 297458 2048 64 41122 70913 1003871 257031 2048 128 24139 58369 1213986 245210 2048 256 49522 87290 1134013 405859 2048 512 38638 118862 472005 248819 4096 4 6363 7798 88806 221490 4096 8 12740 24516 268469 285551 4096 16 14241 21146 327205 119661 4096 32 20211 32888 280067 469397 4096 64 25710 77462 495771 766759 4096 128 50119 89222 448434 493847 4096 256 32009 84264 1195220 726765 4096 512 41295 58748 1305678 1346405 8192 4 9944 9513 199085 180472 8192 8 15173 10326 163174 232035 8192 16 23451 19757 600539 484760 8192 32 2811 47872 262488 248363 8192 64 26163 27996 627119 164178 8192 128 29363 33498 1097832 285375 8192 256 28970 57276 320299 224942 8192 512 35558 40757 1149585 665579 16384 4 6073 6329 145172 200927 16384 8 12744 14146 393846 269464 16384 16 9130 17394 236584 286228 16384 32 22501 22589 527051 582853 16384 64 31695 36123 834259 539925 16384 128 40067 54087 1112743 909206 16384 256 33236 60725 535145 812298 16384 512 42294 67146 584957 1362162 32768 4 7037 8348 137111 167484 32768 8 12621 13538 188088 348417 32768 16 19896 15523 331612 197131 32768 32 27053 24627 581467 320375 32768 64 26831 57122 789494 629063 32768 128 22822 40970 284054 485480 32768 256 38449 57710 359100 714522 32768 512 36163 51552 441830 290653 65536 4