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 Aug 26 19:23:41 2026 Auto Mode Machine = Linux oleg243-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-oleg243-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 3317 8457 760859 998622 64 8 1950 5626 754443 412466 64 16 3022 32554 1255511 1363961 64 32 3329 56337 1087638 1188789 64 64 4766 50355 1492919 1049372 128 4 3185 7970 436904 443033 128 8 3996 15577 538051 681476 128 16 8356 26159 256531 766076 128 32 5008 42022 1030846 901083 128 64 10898 65545 1067750 1206978 128 128 14797 73981 1306873 1561553 256 4 7419 12829 630572 376512 256 8 8690 16736 746272 622890 256 16 14927 22527 985259 715443 256 32 7255 31200 546765 889002 256 64 18513 73950 1453348 1147398 256 128 18802 44761 1019886 1391207 256 256 19265 72399 1652404 1673001 512 4 8208 7186 226436 235191 512 8 5639 9699 363130 256391 512 16 17975 33123 1022219 300481 512 32 8942 49545 1580419 658170 512 64 27540 68313 1187895 851903 512 128 24615 26272 595397 559560 512 256 29703 67058 1289930 696600 512 512 36495 68248 1249404 593915 1024 4 4166 3168 119053 471466 1024 8 7492 8320 79060 202891 1024 16 10270 9533 784783 798053 1024 32 16637 27764 1104443 504708 1024 64 26222 31278 1291406 633307 1024 128 39546 89018 327889 732453 1024 256 29708 56180 1406431 1020714 1024 512 24400 92594 924880 1553442 2048 4 5255 6101 107954 153307 2048 8 5459 9793 260927 498059 2048 16 10723 8508 328778 138193 2048 32 8399 38820 744180 813070 2048 64 35802 33118 686326 373722 2048 128 29657 31584 403950 245357 2048 256 24780 47424 321013 1257897 2048 512 19502 60986 901470 803412 4096 4 8279 4352 264034 180902 4096 8 5169 1177 340560 371554 4096 16 11545 14110 248742 345131 4096 32 15982 24200 369143 229365 4096 64 20863 31509 943336 309598 4096 128 19281 28457 713218 438599 4096 256 30050 45234 450008 276160 4096 512 33067 48932 1032270 1033822 8192 4 5147 6401 181122 144133 8192 8 8177 9509 465529 397669 8192 16 18739 21796 510661 562639 8192 32 22411 24615 835499 775530 8192 64 21292 21819 420041 299056 8192 128 20202 37973 265371 277704 8192 256 37414 44863 801004 763247 8192 512 31616 42270 1200809 684827 16384 4 5020 6100 434554 361453 16384 8 8137 11897 378601 188401 16384 16 9806 18045 443578 461310 16384 32 11838 17780 341747 523905 16384 64 16284 33316 519830 358912 16384 128 27067 47468 852802 381245 16384 256 24192 46400 834817 718441 16384 512 27794 39201 668004 702690 32768 4 5556 5545 280351 240611 32768 8