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: Wed Sep 16 21:19:11 2026 Auto Mode Machine = Linux oleg328-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-oleg328-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 1887 8869 591520 537079 64 8 1922 14648 780776 444572 64 16 3805 20239 1066042 913649 64 32 4975 24168 1249666 942521 64 64 5328 24777 1363961 695778 128 4 1863 4332 439767 207461 128 8 4503 9640 771581 715059 128 16 9184 15389 193620 809997 128 32 10133 54301 1332828 576780 128 64 14217 88216 1303699 1121270 128 128 16324 89021 1561553 1658003 256 4 9992 9392 244487 135593 256 8 7714 11254 522297 494400 256 16 12946 27027 1142514 397563 256 32 21006 42518 1132871 396243 256 64 20733 35819 760006 565185 256 128 24520 38266 1479379 904732 256 256 15838 71933 1610276 570288 512 4 2810 7884 556515 325090 512 8 10177 19643 664895 479798 512 16 22147 15312 37931 162383 512 32 15644 18734 1112797 496665 512 64 16733 13746 698640 908101 512 128 22966 93687 932550 1296159 512 256 25752 90749 863551 1446306 512 512 34224 38531 1625889 1970519 1024 4 6077 5475 619513 252841 1024 8 10277 10988 372898 288140 1024 16 10401 18426 610965 273359 1024 32 25580 33870 692758 360050 1024 64 16928 37837 692311 971534 1024 128 26234 67497 1321200 633307 1024 256 31312 37643 1157109 170132 1024 512 17283 26443 638770 1627617 2048 4 11350 16223 296339 304858 2048 8 13319 15343 899393 179006 2048 16 13851 17201 1166982 279776 2048 32 15006 15385 761937 302017 2048 64 25974 49941 1323808 515608 2048 128 40027 33543 616304 666206 2048 256 24288 59161 887316 1220541 2048 512 21106 56751 872978 667967 4096 4 5749 7695 443616 158525 4096 8 13335 8237 351673 344314 4096 16 12989 23191 865231 686349 4096 32 27625 18926 855451 702831 4096 64 27700 67010 431516 219787 4096 128 1489 37729 712479 875951 4096 256 27220 66885 1693965 849067 4096 512 51191 70781 433946 603781 8192 4 4790 6847 585646 277066 8192 8 9578 12334 352675 554674 8192 16 15006 15701 370727 329565 8192 32 18612 21130 487705 450803 8192 64 20148 34757 386069 817898 8192 128 25283 37809 621785 291303 8192 256 39936 56017 682501 446330 8192 512 37320 37660 380528 601643 16384 4 5896 7418 423499 333332 16384 8 15320 10969 366385 493494 16384 16 14402 27108 925230 324575 16384 32 27289 23593 511040 684492 16384 64 28096 44346 326230 560957 16384 128 28573 30952 526494 841966 16384 256 36020 55947 910326 907297 16384 512 33159 51900 415005 929699 32768 4 6972 7230 264247 186303 32768 8 12821 14373 300144 294131 32768 16 15840 14236 623176 603406 32768 32