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 21:22:42 2026 Auto Mode Machine = Linux oleg226-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-oleg226-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 2266 3140 621657 444572 64 8 4051 11607 831569 673098 64 16 4526 48412 1143223 852702 64 32 4786 60203 1013707 720041 64 64 6778 66038 1119387 1255511 128 4 3039 9141 457376 582412 128 8 2749 17419 821147 260136 128 16 10347 24339 1142750 730629 128 32 11786 21727 1074159 1102844 128 64 11846 46511 1406136 1663139 128 128 10203 69043 1377278 2004703 256 4 4244 7114 618584 507006 256 8 10943 15601 809878 650041 256 16 10481 22095 1084800 420942 256 32 7194 26261 1117543 962301 256 64 7114 22525 268381 844929 256 128 11463 77791 972763 999940 256 256 28861 162742 2081678 383232 512 4 4281 4436 478515 148401 512 8 6728 5262 264052 462042 512 16 16270 20444 606667 648041 512 32 5554 16460 996139 1003588 512 64 25356 11551 323230 252591 512 128 10986 48522 1125630 568899 512 256 13501 53878 490426 477133 512 512 11753 125489 246163 232743 1024 4 3607 4158 269398 108278 1024 8 12795 13545 407306 712053 1024 16 13524 20838 753000 701814 1024 32 33404 45122 971534 1038734 1024 64 30393 50781 1383774 247636 1024 128 29768 28653 1599731 1250425 1024 256 30153 59214 1294520 1420384 1024 512 50983 56450 1599731 2156318 2048 4 7783 9794 230553 210116 2048 8 14568 18950 895455 314882 2048 16 17217 29880 705202 997112 2048 32 19546 54498 1221235 426578 2048 64 17596 33366 1241175 746379 2048 128 17596 42497 833181 1225591 2048 256 27265 82941 931278 1270548 2048 512 27352 53101 252490 677877 4096 4 5492 1318 239882 344494 4096 8 12693 11953 176209 209439 4096 16 11749 14538 398366 476057 4096 32 17203 19055 641619 474230 4096 64 14652 27471 403143 510533 4096 128 21413 37358 821185 605376 4096 256 40960 33154 1046480 464247 4096 512 27682 68443 1944126 1150247 8192 4 6715 5622 166477 265989 8192 8 8397 13849 330471 269863 8192 16 8818 19764 752664 601243 8192 32 23859 32619 699751 204346 8192 64 26951 37783 639158 557925 8192 128 32076 37623 542766 728241 8192 256 51845 67892 587659 762248 8192 512 42993 65813 1539014 840814 16384 4 7326 7357 505696 419049 16384 8 9312 9710 247421 191937 16384 16 11309 23064 788295 540941 16384 32 25572 30643 512049 810248 16384 64 27731 26981 729337 448681 16384 128 25873 51678 1057632 931223 16384 256 35271 39265 697639 748914 16384 512 32230 46877 955448 770866 32768 4 7100 8446 591341 406208 32768 8 10763 12271 512344 475140 32768 16