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 02:20:21 2026 Auto Mode Machine = Linux oleg136-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-oleg136-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 3083 7398 659861 424198 64 8 10056 44385 515423 743988 64 16 13095 17043 1105556 1101022 64 32 13617 5350 1285575 288390 64 64 4238 64905 520419 1828508 128 4 8866 9166 1206978 747933 128 8 9243 48524 1076312 805138 128 16 13077 56436 1175271 770474 128 32 4388 44976 1220700 656477 128 64 11962 39976 1196221 1391557 128 128 9636 36457 826202 2035099 256 4 10102 7306 668662 216227 256 8 5024 19178 921029 1340826 256 16 28899 46067 1035624 972763 256 32 31246 91852 1868008 1070737 256 64 35319 92749 1286217 1175022 256 128 24196 40213 1231629 785584 256 256 30224 55907 1361224 2152625 512 4 3084 7215 541227 270334 512 8 12557 12264 150364 687237 512 16 21866 24095 1043072 740816 512 32 28477 25615 1347393 1019791 512 64 34398 56128 1510391 1306409 512 128 23850 83648 926116 1055375 512 256 40943 105788 1555239 1333173 512 512 40131 159547 1619757 2225819 1024 4 7668 13819 186180 296556 1024 8 7642 18139 336838 467565 1024 16 14859 23020 788964 324471 1024 32 31619 48297 1108434 616136 1024 64 33914 32172 526743 1281389 1024 128 37368 51534 766985 1018052 1024 256 43345 89990 1732676 1013010 1024 512 52186 112343 1799462 1121751 2048 4 9528 9798 405476 274598 2048 8 8926 15139 967029 508707 2048 16 20911 27597 380038 981840 2048 32 21586 35089 760453 1150570 2048 64 18651 20377 1155057 1426234 2048 128 41450 103044 1976603 915497 2048 256 40942 40303 1639674 1492654 2048 512 54289 57136 528000 677022 4096 4 11559 6507 574485 358947 4096 8 8745 10803 269476 423182 4096 16 19809 26230 1199392 490072 4096 32 23518 31647 522584 408132 4096 64 19890 54418 715595 342817 4096 128 51967 46088 1654327 639707 4096 256 34259 43053 1734848 1256039 4096 512 48618 38115 1074493 1677262 8192 4 7099 12079 292927 265267 8192 8 14331 15392 520193 242602 8192 16 21380 32576 563608 754250 8192 32 27896 27995 1144454 697605 8192 64 36216 38211 781457 406769 8192 128 33561 28743 1146822 1246507 8192 256 36052 53961 456281 959479 8192 512 52549 72143 1401305 1516999 16384 4 10278 9972 325732 284667 16384 8 13017 14725 593023 515432 16384 16 27839 28032 684840 778410 16384 32 31887 35363 1007309 678537 16384 64 48838 55513 762399 847292 16384 128 47986 64235 568531 447331 16384 256 59185 62118 609664 585520 16384 512 51982 54182 969124 527767 32768 4 7979 9701 339881 215773 32768 8 11063 13420 428703 219623 32768 16 21016 21590 542525 523517 32768 32 27585 34911 999848 807828 32768 64 33012 52925 1107996 607535 32768 128 41854 48004 1726906 1077227 32768 256 46140 81213 1239139 626851 32768 512 33028 55068 1817523 1227683 65536 4