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 Sep 11 21:22:29 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 2195 4571 511494 399573 64 8 3769 7911 829001 640954 64 16 3318 9150 1017549 1033216 64 32 5346 44629 1330167 1017549 64 64 2604 69187 1599680 503814 128 4 2217 12569 535368 315286 128 8 4455 11473 329205 75831 128 16 3213 19005 940549 726674 128 32 6373 44337 1294270 1093856 128 64 4548 60747 542400 908709 128 128 10422 17348 1543594 2098744 256 4 3052 3296 153483 146369 256 8 5576 11612 955451 499925 256 16 13834 25231 1168627 833776 256 32 11962 31503 1286217 1128110 256 64 7730 32632 1332507 644965 256 128 9534 103385 1610276 1455317 256 256 12447 42765 1347557 2152625 512 4 9791 11355 599553 564561 512 8 14649 22511 895230 675350 512 16 19725 28608 558396 755144 512 32 17426 37588 678337 1216149 512 64 6758 17169 626672 1205228 512 128 16837 62983 1556366 997991 512 256 25819 41138 1684557 1055894 512 512 20367 91103 1712772 2256220 1024 4 6112 7351 319499 133368 1024 8 7158 17702 864908 586839 1024 16 10957 17401 1050420 297171 1024 32 10302 20590 1015885 930088 1024 64 15139 40557 1386007 586519 1024 128 17901 25336 1200447 1328146 1024 256 24925 85168 296208 464430 1024 512 34137 52493 1563053 500240 2048 4 5958 8372 507415 232677 2048 8 11999 7909 784339 140950 2048 16 18161 14220 1099890 263674 2048 32 13673 20828 590219 327462 2048 64 22352 29799 171326 310680 2048 128 30920 65801 1330575 1013345 2048 256 23422 82904 1605053 333605 2048 512 36031 65504 957436 577870 4096 4 6573 6196 264326 289058 4096 8 7790 13173 310325 478337 4096 16 16036 21173 407436 644531 4096 32 13789 25141 480746 1173263 4096 64 18983 45679 884292 302554 4096 128 15193 54167 676671 1340835 4096 256 48620 36689 760918 750317 4096 512 30256 47434 1004917 576993 8192 4 5510 7006 191097 158106 8192 8 8868 2410 484364 324694 8192 16 15664 20479 538944 340145 8192 32 28879 33340 717145 637604 8192 64 28077 41099 595130 710428 8192 128 26976 45329 493789 855831 8192 256 36456 44291 1170099 962624 8192 512 37190 38000 564340 448901 16384 4 6139 6555 200330 202511 16384 8 10412 9835 278086 286870 16384 16 10755 13571 330942 365135 16384 32 13924 20279 486128 240090 16384 64 22264 26248 594377 638604 16384 128 22968 38378 793758 695120 16384 256 23927 38581 806256 685174 16384 512 36260 40302 1212287 1068685 32768 4 5382 6921 303169 299037 32768 8 10092 12589 430993 403401 32768 16 19247 16484 696966 603353 32768 32 17744 28521 443218 340506 32768 64 23270 31604 536961 519838 32768 128 22839 37609 525869 427724 32768 256