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: Sat Sep 5 01:32:01 2026 Auto Mode Machine = Linux oleg435-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-oleg435-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 2440 5848 179699 673098 64 8 5766 18291 809014 852702 64 16 3898 11281 780776 969761 64 32 2870 67875 1183548 939223 64 64 5277 84551 1163036 1828508 128 4 5114 11833 220317 595328 128 8 10478 6218 753179 731625 128 16 6624 31603 1111981 921183 128 32 8436 58900 537512 1015251 128 64 10496 102401 1424795 468962 128 128 7653 63401 1579934 2098744 256 4 5421 6375 147293 307679 256 8 12064 25063 206298 556687 256 16 5648 33229 660030 867455 256 32 14828 30824 1262029 1108314 256 64 11839 40283 1036624 506050 256 128 15614 48864 644965 1629830 256 256 13132 64989 1707589 543445 512 4 10451 12011 405353 143540 512 8 13128 20271 442524 616772 512 16 19691 19556 1040545 982467 512 32 20407 51994 138674 1264113 512 64 36994 50563 1100818 1125040 512 128 17700 54554 612550 907717 512 256 12489 121437 1652157 1137555 512 512 18347 114772 1533034 1747618 1024 4 10273 13967 442515 431533 1024 8 14536 19148 851870 587160 1024 16 23455 41555 1012771 1014685 1024 32 33153 38535 1383774 1147832 1024 64 16678 74979 575285 695675 1024 128 30357 65160 1486247 1408275 1024 256 18539 109705 1125277 950044 1024 512 49084 123476 456969 1039489 2048 4 7663 5853 437418 129252 2048 8 12655 10541 868213 402606 2048 16 9799 26644 1030239 577870 2048 32 16390 15794 1155212 394380 2048 64 25488 34744 580016 377433 2048 128 23561 20004 1268110 463999 2048 256 28898 70271 1489289 705955 2048 512 39958 52554 1412398 1568134 4096 4 8598 8946 261104 229957 4096 8 8393 10807 401569 234781 4096 16 32951 19147 570384 408132 4096 32 22947 31652 935172 851044 4096 64 21673 40832 468437 417323 4096 128 31889 33530 675925 1105539 4096 256 35451 36613 1027331 554031 4096 512 34555 62373 1187290 566603 8192 4 6170 6645 165451 360706 8192 8 10559 13042 480778 436770 8192 16 17413 18812 681243 602709 8192 32 16950 29783 333875 396169 8192 64 26806 36273 647749 848895 8192 128 47909 44662 1381417 944628 8192 256 39894 40491 961170 761353 8192 512 40693 65833 575686 892372 16384 4 7256 7235 273778 149248 16384 8 9723 12695 419039 258174 16384 16 18735 19331 531638 314229 16384 32 26145 42916 388936 400556 16384 64 32874 34966 916995 434832 16384 128 31300 49254 1427675 936924 16384 256 41072 55070 480469 1240472 16384 512 39710 58518 903005 281038 32768 4 7430 7068 479421 273531 32768 8 12053 8772 293183 403283 32768 16 14493 18886 669911 929509 32768 32 20113 31581 737920 888096 32768 64 26559 46259 651851 366008 32768 128 32539 51155 1397592 1195081 32768 256