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: Mon Jun 1 12:33:02 2026 Auto Mode Machine = Linux oleg219-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-oleg219-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 1207 2857 571375 528618 64 8 2062 9217 727850 532815 64 16 3781 8405 313664 780776 64 32 1634 43749 1105556 68974 64 64 3533 11381 308970 679917 128 4 1444 3533 597981 516318 128 8 3137 9959 112674 556454 128 16 3058 18823 706589 606767 128 32 6589 25697 948860 1007629 128 64 7384 38752 1155043 1165070 128 128 5857 26430 1229084 270082 256 4 1450 5143 423766 550409 256 8 4121 7262 271777 718796 256 16 3706 11638 952062 368375 256 32 9337 21568 1128110 556398 256 64 7096 21592 1132871 1190657 256 128 12128 49241 1262029 156869 256 256 13941 55365 156846 2812272 512 4 5174 3776 46765 116788 512 8 4182 8373 481735 417326 512 16 9005 17019 696600 794832 512 32 6358 24145 1040545 447131 512 64 7728 12278 1130370 403752 512 128 7663 20538 1152822 261734 512 256 18476 57470 946526 1267097 512 512 12056 51246 1546280 1585086 1024 4 3386 3480 134013 143597 1024 8 7789 10976 979958 117632 1024 16 9855 12482 899883 850521 1024 32 10567 32130 1140517 317327 1024 64 22417 43288 631723 820463 1024 128 31606 66824 1223356 1085737 1024 256 10767 32114 257340 213469 1024 512 14270 22706 161898 1432225 2048 4 3531 3392 140340 194290 2048 8 4479 4416 238497 797520 2048 16 13098 11156 385548 391148 2048 32 26479 35821 642631 323589 2048 64 32613 51213 458183 1049241 2048 128 27199 34075 215893 237148 2048 256 24609 39884 656833 295148 2048 512 36070 62854 970635 1289043 4096 4 3812 2790 336235 186563 4096 8 8272 19167 543085 436305 4096 16 10212 12888 664063 376645 4096 32 11271 1122 651720 1257971 4096 64 25658 36121 1427159 1083848 4096 128 19787 40580 1160033 274843 4096 256 22803 56707 888730 537748 4096 512 17133 52048 1569395 408939 8192 4 4648 4355 247311 91435 8192 8 8192 8484 384854 421117 8192 16 10804 20073 684555 602307 8192 32 14609 25034 457271 346501 8192 64 18570 17555 341104 402118 8192 128 25182 24684 284188 290434 8192 256 19865 20293 493257 223916 8192 512 21320 20138 303025 267904 16384 4 3831 3522 173711 163192 16384 8 6675 5726 197148 251534 16384 16 9878 12540 361206 314272 16384 32 17223 18508 556826 479078 16384 64 18220 26543 701642 463544 16384 128 27118 23740 269851 659022 16384 256 33110 36280 896620 767328 16384 512 25462 38295 1021246 812942 32768 4