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 Jul 7 12:56:04 2026 Auto Mode Machine = Linux oleg304-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-oleg304-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 3627 12603 565358 551422 64 8 5576 26599 939223 369844 64 16 9708 16602 1083249 969761 64 32 2399 37424 344233 1101022 64 64 4305 76568 743988 315507 128 4 7466 7982 627328 240554 128 8 5404 10263 762811 789741 128 16 3445 47515 1015251 501839 128 32 9987 72366 948860 1085013 128 64 9366 66701 135443 1346196 128 128 11010 94606 1508887 2166499 256 4 4323 13232 682691 582035 256 8 14548 25832 820398 753077 256 16 6649 13050 1080434 1058076 256 32 11277 24438 673696 1058076 256 64 8747 47285 876662 1325925 256 128 14805 28293 1570244 1506359 256 256 19173 146629 1778290 475779 512 4 7084 3700 635386 436497 512 8 16053 17767 411884 584380 512 16 15005 38036 1163439 1040545 512 32 14960 34805 710192 506027 512 64 14766 53894 1556366 1316016 512 128 22213 25250 1684557 1358474 512 256 25647 87091 1450212 1044594 512 512 12078 55172 1689859 2073249 1024 4 7719 7110 88743 420876 1024 8 9753 11513 603835 171978 1024 16 13562 31777 820463 775712 1024 32 32600 42263 710052 887975 1024 64 45167 52777 895754 1026078 1024 128 44611 109367 359929 361474 1024 256 25076 56084 1633188 1159609 1024 512 33236 87477 1721563 1072185 2048 4 7512 5074 190845 123738 2048 8 8593 11988 925060 809774 2048 16 18417 15326 718594 381523 2048 32 22364 41939 1343897 910258 2048 64 38588 33820 330270 549797 2048 128 40575 53908 1580250 1400653 2048 256 33850 31128 280315 911031 2048 512 47948 75244 1761024 735640 4096 4 4928 5706 385286 391851 4096 8 15470 8767 353744 540658 4096 16 17030 22793 629188 692267 4096 32 27676 24790 465720 798105 4096 64 25179 39925 1063057 539877 4096 128 29556 30295 1048652 597253 4096 256 43810 42122 1044317 863578 4096 512 36362 77686 1081324 329445 8192 4 2170 6508 496178 553369 8192 8 9240 11233 505306 433278 8192 16 14292 26709 607450 457320 8192 32 23841 29074 582686 662512 8192 64 24042 43039 1104218 576333 8192 128 32026 54806 1163797 773053 8192 256 32187 66622 711856 654885 8192 512 38695 70655 691651 599303 16384 4 6383 6115 384258 452170 16384 8 10752 11398 235077 435871 16384 16 15591 18642 537993 534096 16384 32 22221 28441 765030 614967 16384 64 32699 33740 414282 687539 16384 128 38445 56314 562288 603195 16384 256 39794 56541 1441874 1096375 16384 512 41624 79447 1310819 962527 32768 4 7310 7075 418455 306315 32768 8 12334 15061 343735 313626 32768 16 17740 18780 746935 684147 32768 32 24900 34381 732590 418167 32768 64 32260 39347 1122080 543074 32768 128 32763 56928 1215297 875726 32768 256 37259 60013 1010983 357951 32768 512