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: Thu Nov 6 23:35:24 2025 Auto Mode Machine = Linux oleg117-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-oleg117-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 7366 14862 238015 209093 64 8 8433 26723 269837 331481 64 16 8811 41885 659861 338589 64 32 13570 58715 831569 633392 64 64 11090 73568 60203 1143223 128 4 11320 18192 192233 133490 128 8 14778 32079 278343 374437 128 16 18812 49591 633247 542400 128 32 19735 55727 66388 274641 128 64 13246 88639 1022989 1102844 128 128 25503 75246 1663139 1421023 256 4 11019 7849 186064 218648 256 8 8288 16298 482189 31896 256 16 9177 8314 547044 48130 256 32 19237 32315 746792 760006 256 64 28641 107108 480248 307679 256 128 45920 123492 1293967 1267990 256 256 23783 132580 1579483 1897721 512 4 9129 18817 254960 212352 512 8 14885 13272 261098 149788 512 16 9505 15344 560144 510964 512 32 14858 24577 443346 736750 512 64 40097 72133 1026126 157430 512 128 33512 101690 1123275 1064794 512 256 43993 111108 1442420 685263 512 512 18714 60378 322599 1695195 1024 4 8400 17126 245275 178891 1024 8 22993 17521 213236 139570 1024 16 22757 28997 611748 452682 1024 32 23245 75482 870694 376757 1024 64 24524 98490 761410 924283 1024 128 34756 48629 1061322 1109579 1024 256 57899 58410 1352828 1387350 1024 512 24677 118600 1508167 1630707 2048 4 6741 9837 153028 195515 2048 8 16460 9657 204674 136225 2048 16 26626 27515 426303 300380 2048 32 33320 15971 436484 159974 2048 64 45708 43104 261292 259109 2048 128 36024 120718 1312882 1111849 2048 256 45533 50472 1559876 1276022 2048 512 54076 99703 1516101 1576769 4096 4 8475 7912 227115 190325 4096 8 10825 20371 142411 190608 4096 16 26291 32120 153500 253529 4096 32 26436 49147 699340 466834 4096 64 48412 55462 559626 984135 4096 128 41067 62654 541374 448141 4096 256 27048 56000 945933 1091353 4096 512 58741 61360 1600687 1413887 8192 4 2400 12500 152304 155809 8192 8 18235 23639 373809 278998 8192 16 26100 32015 446480 458938 8192 32 24047 38968 399082 443266 8192 64 35342 50433 780995 352542 8192 128 41774 75120 1169263 663471 8192 256 63146 76925 1326026 1019159 8192 512 58162 83738 997906 752664 16384 4 10719 13480 241363 163836 16384 8 16657 19174 223309 281420 16384 16 26058 25529 381006 481924 16384 32 21557 46331 590841 322811 16384 64 27338 50552 667673 375763 16384 128 54037 44359 916176 1159689 16384 256 48168 74079 1268125 639275 16384 512 64832 64265 1159513 779522 32768 4 10461 10986 166100 156920 32768 8 14076 18326 376812 220797 32768 16 24673 40908 369930 302689 32768 32 40426 43422 964505 536169 32768 64 45303 65011 504526 606658 32768 128 45333 52904 1031771 1168571 32768 256 49599 71075 847505 792837 32768 512 40968 70294 1301704 764195 65536 4