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: Tue Sep 1 09:38:00 2026 Auto Mode Machine = Linux oleg237-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-oleg237-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 4114 18018 555990 315136 64 8 5864 28379 842003 328238 64 16 9341 45677 901377 720041 64 32 4025 50346 1049372 889431 64 64 5316 67944 1210227 1768283 128 4 5632 11170 695603 573699 128 8 8221 26981 870405 547377 128 16 10388 52414 955616 883293 128 32 15014 60181 1579934 976473 128 64 15355 79550 1111981 1504659 128 128 18457 109013 2166499 1579934 256 4 12103 18148 442815 659625 256 8 15680 26087 775933 910872 256 16 18447 39980 1070737 735537 256 32 24457 69096 1267990 1489641 256 64 17525 129807 1102624 1369908 256 128 25638 95521 1894373 1413179 256 256 35908 135235 2509882 2000242 512 4 12311 15807 656561 184447 512 8 20382 30094 581216 1021732 512 16 18727 51427 1683237 1005938 512 32 32966 63374 1180062 1032540 512 64 20926 84083 1201856 1242177 512 128 26360 95699 1547395 1411141 512 256 23345 138156 1679288 1406520 512 512 37249 70993 661618 2427068 1024 4 15617 14059 375900 453926 1024 8 20917 29245 952573 693317 1024 16 21997 41792 516110 1098511 1024 32 40722 72604 577917 1078106 1024 64 52558 99319 1171629 705735 1024 128 62165 108232 1789714 1105865 1024 256 50086 122692 918354 1342258 1024 512 44037 133505 1786736 1684429 2048 4 17207 17400 347239 495273 2048 8 27574 28148 899487 872268 2048 16 34270 55257 1051295 1030610 2048 32 34421 82281 1027650 1423162 2048 64 64434 99630 1656751 1198405 2048 128 58960 79149 1647536 1348963 2048 256 55773 134207 1822292 1014422 2048 512 36664 106906 1844994 1406616 4096 4 16000 18282 619947 645670 4096 8 21508 30327 421790 467736 4096 16 33195 36760 603314 336505 4096 32 48410 56855 1276383 634556 4096 64 54788 59155 951013 706560 4096 128 57645 64654 1683507 1072012 4096 256 88904 75988 1299457 1596819 4096 512 50715 108776 1625987 1466008 8192 4 16492 18146 471237 543634 8192 8 26751 32277 1048262 675736 8192 16 35354 46554 1327460 890822 8192 32 56623 73200 682149 1363546 8192 64 66926 90229 1117760 1357619 8192 128 72874 117844 1584215 1210582 8192 256 74918 122565 1498736 1460512 8192 512 82117 110029 1587582 1219952 16384 4 17026 18124 557924 626517 16384 8 26729 30358 901170 867562 16384 16 43914 50012 1161001 991840 16384 32 56954 75516 959758 1140538 16384 64 68744 74746 1394390 1405743 16384 128 81248 104532 999820 853162 16384 256 71330 107758 1463897 1465458 16384 512 83203 110350 1733029 1524226 32768 4 17740 19122 640213 709956 32768 8