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 Jan 30 01:04:19 2026 Auto Mode Machine = Linux oleg101-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-oleg101-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 3245 7748 249985 229274 64 8 6849 19464 409946 378715 64 16 6682 32502 435202 645579 64 32 3597 12454 720041 780776 64 64 4819 16296 780776 1392258 128 4 4329 6824 33350 78814 128 8 9079 16895 396271 384356 128 16 8140 30984 165813 401307 128 32 10547 39034 859260 347983 128 64 12189 39762 985435 462100 128 128 4680 57194 1306873 1579934 256 4 6887 6718 116688 108067 256 8 10820 23860 255239 344500 256 16 10922 37015 293548 560172 256 32 8699 32774 800221 124451 256 64 12847 37204 1007446 941213 256 128 9722 42931 125733 1103757 256 256 5251 127753 1481420 1683493 512 4 4421 3300 326971 248902 512 8 13830 21540 389969 364115 512 16 6832 23186 258334 554789 512 32 16380 19443 32276 494720 512 64 11751 74594 949875 1015932 512 128 15602 34977 1233614 1047141 512 256 14606 33316 305656 105285 512 512 24244 83975 641460 1662389 1024 4 4890 4827 205414 76094 1024 8 4418 6677 406343 78461 1024 16 14191 15962 332458 294341 1024 32 28443 23859 140139 147104 1024 64 25920 43050 315462 263030 1024 128 19377 47356 867704 1023145 1024 256 10771 25639 664464 348906 1024 512 15314 56763 1153381 1099918 2048 4 3732 4221 155668 67557 2048 8 8587 11670 204168 138349 2048 16 10024 20965 173766 70769 2048 32 10655 17713 149260 199669 2048 64 20546 38777 1030239 287964 2048 128 19039 24560 337670 247607 2048 256 11110 24643 1125249 372975 2048 512 22046 49862 504317 671518 4096 4 6200 5758 90925 90172 4096 8 8948 9159 140843 115052 4096 16 12948 18971 233454 169186 4096 32 15742 18978 286131 153305 4096 64 11974 19659 274588 568647 4096 128 16625 27195 642314 411249 4096 256 27211 37861 507307 523316 4096 512 22275 35400 615307 382558 8192 4 4087 4048 145356 71989 8192 8 6356 7438 184936 148880 8192 16 14758 18807 354279 229963 8192 32 12157 17674 185616 221064 8192 64 22833 25699 513607 534933 8192 128 26802 33258 724112 411223 8192 256 40148 36352 718720 403388 8192 512 30368 61888 674794 599575 16384 4 5037 5586 105969 76172 16384 8 7525 12228 225203 138679 16384 16 15036 12512 225631 420619 16384 32 16035 28024 364631 417948 16384 64 24148 24516 291416 341674 16384 128 32748 40316 732306 551999 16384 256 35381 44558 1023924 751420 16384 512 33250 49071 748669 521931 32768 4 6549 10907