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 Aug 25 21:17:24 2026 Auto Mode Machine = Linux oleg239-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-oleg239-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 1183 12613 614542 541412 64 8 3920 15701 877797 28569 64 16 2027 13766 718114 916769 64 32 1970 34669 998622 154201 64 64 4021 25358 1460430 1722886 128 4 3849 6794 722760 253383 128 8 5875 18534 1007629 735635 128 16 6564 23451 971174 1040839 128 32 7796 25974 1391557 1017175 128 64 6744 43880 841746 1206978 128 128 4091 66627 1967960 1802755 256 4 4482 9430 462858 566377 256 8 4214 6582 380381 744204 256 16 4581 18482 477684 380920 256 32 14390 34882 1267990 1128110 256 64 12854 65725 1384034 1195962 256 128 11898 50285 1523457 1224606 256 256 14273 62063 1248819 1479379 512 4 7929 10871 1051242 580431 512 8 11572 18850 740816 741840 512 16 15804 16084 731480 984720 512 32 21766 50478 1414860 614654 512 64 13007 27458 1476130 290915 512 128 21356 67725 1333173 1305615 512 256 22886 45706 1045103 1571169 512 512 14983 59520 669247 1289930 1024 4 8320 7017 408585 238466 1024 8 3837 6004 146431 189282 1024 16 5549 9107 193320 301701 1024 32 20288 11400 1347311 1052480 1024 64 10107 26851 745161 1236742 1024 128 29285 77923 696691 738753 1024 256 19267 35668 287330 439122 1024 512 26781 63785 1289467 313734 2048 4 6190 9431 318360 416425 2048 8 11298 5147 951708 246625 2048 16 9994 8007 311344 284051 2048 32 25796 22833 356801 186099 2048 64 31075 29425 640236 531101 2048 128 28270 51768 491476 312772 2048 256 36486 36878 1671581 415578 2048 512 47486 95269 1758140 757970 4096 4 3615 9390 143890 135333 4096 8 13686 9906 223825 249784 4096 16 14689 23010 616211 760783 4096 32 43458 37453 538726 210581 4096 64 28587 17694 626389 347090 4096 128 33267 39086 476942 342045 4096 256 30215 69880 912667 1513137 4096 512 32455 40267 1792593 421221 8192 4 5082 6348 331217 317975 8192 8 2762 9999 246019 297608 8192 16 12328 18284 612126 464899 8192 32 22230 28337 816925 772601 8192 64 19419 18926 612584 541765 8192 128 20408 31682 363892 653950 8192 256 44229 35308 1387554 1516999 8192 512 35102 32067 614875 1004911 16384 4 5274 5980 193406 284177 16384 8 12251 9956 932664 336669 16384 16 26269 30598 340128 257844 16384 32 19856 21789 954559 638225 16384 64 35658 35740 997817 554731 16384 128 16346 28136 429843 398464 16384 256 29808 51574 1101312 544231 16384 512 31407 48837 883569 695183 32768 4 6123 5945 176515 145723 32768 8 8788 11627 306529 295407 32768 16 9594 13908 256790 189708 32768 32 14191 16917 814777 659752 32768 64