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 24 14:13:55 2025 Auto Mode Machine = Linux oleg437-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-oleg437-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 10284 13297 272300 188269 64 8 12047 32921 473593 418250 64 16 8545 48412 674790 695778 64 32 7006 27875 939223 727850 64 64 15205 85006 1249666 799377 128 4 4794 8278 281260 263973 128 8 15910 20453 516318 325809 128 16 18143 51672 722760 659704 128 32 27790 83122 983630 985435 128 64 28699 109951 1082825 983630 128 128 18282 125121 94191 1102844 256 4 14313 16685 314161 297286 256 8 12985 23931 443730 412849 256 16 28177 61217 654798 612235 256 32 23220 44214 390195 183113 256 64 39402 110435 927393 1075025 256 128 32208 125601 1267990 668246 256 256 23940 52925 1639786 1884399 512 4 9956 12306 258334 254477 512 8 14175 29987 449094 323620 512 16 25408 38478 699322 322648 512 32 49292 91134 896725 468493 512 64 44436 62898 1391032 244872 512 128 29841 47739 1239310 1187895 512 256 52887 101608 1333173 509993 512 512 25786 171075 808599 2081286 1024 4 11423 12409 152315 262419 1024 8 26524 22197 524620 414900 1024 16 33821 54794 473024 648120 1024 32 51166 30755 481401 717525 1024 64 38677 91039 518477 228057 1024 128 47048 43882 1273410 1254808 1024 256 71568 141655 1483680 1361836 1024 512 26505 142241 1675884 1965834 2048 4 7666 8175 195890 127920 2048 8 13538 23058 366108 228038 2048 16 21824 31251 329687 746055 2048 32 23688 39763 773115 345118 2048 64 54327 47496 1198237 1074573 2048 128 72685 71875 1332432 455100 2048 256 55071 66586 1652925 471564 2048 512 61723 99683 1718053 1662523 4096 4 10996 10766 245388 196299 4096 8 17963 19292 546645 291511 4096 16 27929 28994 194103 348209 4096 32 40426 41312 837315 831680 4096 64 48668 59602 1066621 367744 4096 128 34631 78592 1480282 1191077 4096 256 76046 104615 1545674 1085080 4096 512 58326 52949 1039075 668742 8192 4 8987 9262 266060 93848 8192 8 14045 21209 230766 199449 8192 16 23036 25451 623296 515905 8192 32 28626 42604 338020 468060 8192 64 27005 45082 807404 802426 8192 128 27603 40268 823899 1101068 8192 256 50027 46156 1325565 1087202 8192 512 46771 66860 531392 892187 16384 4 8604 9191 135227 160501 16384 8 16788 17064 206837 381093 16384 16 22096 29671 344882 290517 16384 32 31975 48232 656015 412829 16384 64 32215 41475 515444 543486 16384 128 34984 58514 477544 1050390 16384 256 45434 52667 1127439 1369437 16384 512 57227 79877 948747 976992 32768 4 9310 10324 159183 118687 32768 8 17927 18607 320767 227027 32768 16 25720 30795 449880 508937 32768 32 35083 49199 876754 714697 32768 64 49960 61051 1015435 838892 32768 128 59302 73445 618952 1000794 32768 256 70847 85507 1230398 876083 32768 512 45677 85818 965013 906494 65536 4 9511 13108 207141 163224 65536 8