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 Aug 19 07:08:56 2026 Auto Mode Machine = Linux oleg348-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-oleg348-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 2324 8728 695778 555990 64 8 1442 15473 939223 261173 64 16 2176 9163 119634 1124074 64 32 1406 52636 1392258 1392258 64 64 2579 68974 1599680 1599680 128 4 1711 6330 695603 486822 128 8 4947 18699 637004 774922 128 16 3862 24535 1152564 707520 128 32 5990 37177 1377278 1152564 128 64 4403 39715 361576 1217930 128 128 7594 90844 455822 1579934 256 4 5257 2846 266383 241030 256 8 3968 4754 629094 329085 256 16 4661 20356 430218 907792 256 32 5740 32778 659625 562815 256 64 9736 47858 1325925 1079348 256 128 7179 35859 1471270 619655 256 256 6640 91524 1622442 268046 512 4 6244 6409 618371 105218 512 8 8147 6718 571472 468391 512 16 10670 15659 965679 863551 512 32 12880 21671 1395552 1007827 512 64 6084 20347 362823 558977 512 128 17669 64646 1413929 816594 512 256 9397 19105 1695195 1772135 512 512 7785 23190 182596 2152206 1024 4 6638 4365 199331 524044 1024 8 7613 8632 91552 749583 1024 16 12659 20425 746846 856970 1024 32 17162 32928 561154 295190 1024 64 18545 41104 790707 562624 1024 128 18951 45921 1250061 168974 1024 256 27633 57537 1530197 1125277 1024 512 25816 73685 1376677 979958 2048 4 5168 7004 321758 472993 2048 8 7029 9684 445124 305857 2048 16 9949 10589 584834 779570 2048 32 31031 41855 1183870 1027159 2048 64 38057 59517 1105837 924662 2048 128 15043 50510 751012 502429 2048 256 47320 47165 1016463 775488 2048 512 17381 36568 352309 498059 4096 4 3554 9141 222549 125755 4096 8 5355 12961 353133 239869 4096 16 6650 31512 164988 228967 4096 32 16670 9985 462149 281066 4096 64 11411 10033 280681 408336 4096 128 12224 61354 823824 395132 4096 256 9951 34749 353773 619656 4096 512 39268 67893 1087346 1548600 8192 4 6804 7017 170826 184329 8192 8 3496 7246 116213 190122 8192 16 14308 13517 355680 209037 8192 32 12103 37180 434247 299064 8192 64 28362 51145 479036 868068 8192 128 37399 57312 460846 1027725 8192 256 34658 43033 782364 693116 8192 512 24245 65853 822735 491339 16384 4 7649 5456 257918 230686 16384 8 7548 8208 389195 427445 16384 16 12762 14297 462238 508739 16384 32 18497 21786 531881 401657 16384 64 22954 29805 969357 798554 16384 128 23339 33949 758796 704260 16384 256 31543 48625 896573 621171 16384 512 29207 52587 943122 581940 32768 4 5513 5735 223701 273826 32768 8 7585 9530 486172 335321 32768 16