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: Fri Jun 26 09:41:20 2026 Auto Mode Machine = Linux oleg249-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-oleg249-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 1905 12485 703068 252810 64 8 3688 18207 405610 201255 64 16 4473 24140 686877 842003 64 32 9492 59867 2052169 250919 64 64 4694 28597 842003 440921 128 4 4303 8358 692017 485063 128 8 9015 32828 877518 695603 128 16 8611 28668 1102844 513847 128 32 7299 67009 240554 877518 128 64 12319 17426 197248 1346196 128 128 3526 66984 1332828 1802755 256 4 3250 6589 668246 543445 256 8 8125 7420 250242 399337 256 16 4431 9175 1036624 182057 256 32 9151 39439 1112909 1089202 256 64 15031 61508 1027695 1062263 256 128 15388 68759 1398455 1400278 256 256 8319 63921 1817419 1740810 512 4 6608 3827 285577 134665 512 8 10514 17683 615359 762924 512 16 17547 13546 1180062 1024169 512 32 23044 34806 1171691 1000315 512 64 14503 59465 951558 790153 512 128 16007 65833 934173 710192 512 256 24855 90991 743123 1677976 512 512 26419 93483 1574625 515626 1024 4 6235 7434 256449 441741 1024 8 18008 11203 895754 784640 1024 16 24079 29545 559254 603835 1024 32 26001 47554 888159 953418 1024 64 31697 58271 1525848 636781 1024 128 12514 29793 1563622 517665 1024 256 15743 34301 808874 1210598 1024 512 19858 45838 383383 1312720 2048 4 7526 9328 327051 239675 2048 8 14462 20885 756835 763088 2048 16 28585 20922 798780 825415 2048 32 36786 34609 551704 358364 2048 64 21738 46623 1172878 840353 2048 128 36236 72199 1081882 1363523 2048 256 45110 51850 1211931 836996 2048 512 35043 88653 1436250 328100 4096 4 4126 5249 326919 207855 4096 8 12557 14958 354693 365196 4096 16 15103 18652 330745 411623 4096 32 22670 23402 528386 800933 4096 64 25074 43977 448527 348477 4096 128 30410 34435 1443831 630944 4096 256 20570 30931 1644981 310538 4096 512 22834 37629 1680214 223618 8192 4 6385 5892 314460 387677 8192 8 12521 15024 391252 564609 8192 16 18176 14158 635528 406572 8192 32 13852 3607 390057 670109 8192 64 29855 39231 528954 375299 8192 128 29306 48248 1033164 1242720 8192 256 37937 41854 862945 1004529 8192 512 25479 51901 1166128 804474 16384 4 5134 5058 232667 223489 16384 8 10720 11295 558359 476072 16384 16 17418 17585 548234 801170 16384 32 23363 26514 990753 590415 16384 64 30926 40229 785987 982607 16384 128 31243 41666 1357185 709906 16384 256 37168 54491 841853 1557424 16384 512 49256 72348 1160080 763398 32768 4 6330 5964 438326 314747 32768 8 9447 10841 325553 226406 32768 16 17147 20467 320978 421523 32768 32 19938 26026 794431 643164 32768 64 31658 45186 812196 510341 32768 128 24920 35248 1000605 867036 32768 256 34886 46155 1576066 668884 32768 512 35117 47631 875492 741323 65536 4