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 Jun 16 11:08:57 2026 Auto Mode Machine = Linux oleg104-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-oleg104-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 2800 7342 653436 542506 64 8 5681 27910 703068 342040 64 16 7674 38272 318124 188269 64 32 5654 8281 1452528 1183548 64 64 4491 113705 1421755 524487 128 4 8813 8408 522346 606082 128 8 11515 16951 643108 460514 128 16 9694 24878 1007629 718889 128 32 5545 25574 883293 1185654 128 64 10304 46991 1336145 1349580 128 128 12764 74196 1561553 770474 256 4 9275 13634 662883 95343 256 8 15983 22719 731528 508929 256 16 15094 38004 1286217 917880 256 32 13039 42987 1506359 1391207 256 64 26261 69719 1881098 1479379 256 128 25515 74246 2480886 1579483 256 256 30607 145714 1642294 2187712 512 4 10010 12005 611678 461248 512 8 13031 17558 632020 329681 512 16 39844 27164 980673 977103 512 32 17560 58175 1358474 1565443 512 64 30331 73009 906185 1009722 512 128 30075 69227 904658 1323315 512 256 36446 98858 1204552 1585086 512 512 17337 239012 1695195 1712772 1024 4 4513 7299 621395 241225 1024 8 9228 15370 340065 973516 1024 16 21580 47647 838728 979958 1024 32 29180 46251 1338494 535011 1024 64 17916 41982 1466957 990352 1024 128 15052 111375 873705 1166221 1024 256 35633 100667 1597945 950044 1024 512 31917 130729 1128826 1615374 2048 4 6547 7621 495159 224980 2048 8 7156 16527 314248 823121 2048 16 19954 24203 729332 521145 2048 32 23551 43821 711393 1128946 2048 64 48030 48317 1414259 1272808 2048 128 43470 76119 1422220 936354 2048 256 35913 55108 1172238 517035 2048 512 37304 62706 1174964 1206145 4096 4 8042 7240 362193 132999 4096 8 12982 16765 366302 345686 4096 16 24659 29399 564815 748682 4096 32 21271 36071 910635 713722 4096 64 17912 38625 1457056 461206 4096 128 32786 28778 533407 1290864 4096 256 41373 76304 643517 800485 4096 512 39976 50148 917982 604312 8192 4 6899 6087 374183 413008 8192 8 10779 12572 462877 537460 8192 16 3414 23419 435557 517982 8192 32 24974 29614 366403 426554 8192 64 32135 41430 589514 438073 8192 128 32621 40141 939129 454831 8192 256 36238 51963 1396521 1087925 8192 512 37547 40920 1026803 654000 16384 4 6838 6431 214720 319356 16384 8 10668 13297 463297 352010 16384 16 16312 15363 873817 501116 16384 32 20755 30454 973973 840854 16384 64 26542 39309 1020306 766070 16384 128 29489 45322 1538112 714333 16384 256 50767 58548 1364434 930114 16384 512 38791 60357 662517 668869 32768 4 5286 4668 261326 225434 32768 8 9849 10869 663562 302441 32768 16 15535 18280 553177 350748 32768 32 24333 25123 894273 599775 32768 64 26643 41838 486590 375659 32768 128 24506 41429 646988 396879 32768 256