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 Jun 26 10:53:21 2026 Auto Mode Machine = Linux oleg122-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-oleg122-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 4021 10124 688639 818885 64 8 5284 20989 1083249 818885 64 16 6387 40246 1336792 1124074 64 32 4974 58446 1526887 627470 64 64 4046 79399 1638743 1599680 128 4 6410 11616 653282 511887 128 8 12345 35925 824932 826202 128 16 14152 18727 486822 1142750 128 32 19468 51633 434078 1254941 128 64 13772 97280 2175277 1185654 128 128 10171 44462 1206978 2058509 256 4 11876 8709 646518 571502 256 8 14958 33741 661657 603630 256 16 14392 34773 737558 750970 256 32 20780 76922 1098113 1197295 256 64 27116 110446 904732 473263 256 128 17317 84434 541253 1662639 256 256 23533 171584 761623 2205688 512 4 12354 15609 372064 395426 512 8 13950 19107 920953 601568 512 16 22983 33819 320624 1038532 512 32 28905 67023 898225 673655 512 64 11908 101407 2116152 1245780 512 128 17724 83401 387576 2196227 512 256 45662 84767 643960 1823291 512 512 28458 138076 1358474 1795846 1024 4 6942 9542 159546 291722 1024 8 17503 22725 452492 434457 1024 16 21908 40940 975285 1034232 1024 32 38408 52204 993330 599537 1024 64 43526 75862 284137 429505 1024 128 64581 75633 1223356 859714 1024 256 51118 66727 1250425 1799462 1024 512 69682 87898 394910 1331853 2048 4 13273 9540 235045 525127 2048 8 16605 17638 334866 384529 2048 16 25289 28231 1026545 498521 2048 32 36825 27025 1372675 633672 2048 64 38129 54485 1254040 862286 2048 128 36930 120364 1671907 1481839 2048 256 45039 96891 1312681 1075650 2048 512 69923 73663 1990343 1333259 4096 4 10721 13562 786199 360688 4096 8 24914 22153 961498 837111 4096 16 31241 33789 1294171 842819 4096 32 37509 77229 1323482 934104 4096 64 50081 77765 1174306 1223828 4096 128 49195 98686 617985 1079896 4096 256 49131 84286 1637768 1104686 4096 512 53755 129493 1023964 844352 8192 4 12913 15278 437492 385761 8192 8 19824 19550 940749 635834 8192 16 26759 37780 740291 695529 8192 32 40798 58170 1388002 922934 8192 64 56091 84508 648923 1668774 8192 128 56431 66765 1434895 1623744 8192 256 65921 87770 1342711 827470 8192 512 78226 75627 1643707 833876 16384 4 9820 11292 317531 472120 16384 8 5577 20091 1219775 842451 16384 16 37476 33445 1023863 1144298 16384 32 32932 57156 1258280 697017 16384 64 43781 70417 1044229 1014627 16384 128 58081 79212 1108990 1011729 16384 256 65456 103143 740960 1239712 16384 512 72620 90001 1368292 1139989 32768 4 11288 14131 590011 625892 32768 8 24034 19474 1081559 861860 32768 16 33412 28788 777119 533453 32768 32 30122 44029 1162276 1014678 32768 64 47083 67556 949657 1170252 32768 128 55052 60997 772355 901287 32768 256 54205 85322 1720464 802704 32768 512 53095 84737 1764757 958157 65536 4 11349 13066 425782 488145 65536 8 17845 19756 995866 862825 65536 16 18226 22571 557733 322375 65536 32