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: Thu Jul 30 03:53:41 2026 Auto Mode Machine = Linux oleg445-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-oleg445-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 1402 5140 576282 420873 64 8 2889 6521 627470 780776 64 16 989 4746 520419 763021 64 32 2722 24060 1002351 1029254 64 64 3283 35108 1460430 1183548 128 4 4868 2115 509943 213739 128 8 2085 4390 826202 706589 128 16 4531 11542 1209698 715059 128 32 6982 27520 1172704 990891 128 64 4087 20598 831319 1185654 128 128 9875 64128 1492113 881842 256 4 7224 9243 591330 263378 256 8 10680 18050 778183 653204 256 16 10217 33001 1080434 778183 256 32 9809 29169 1347557 1049800 256 64 11322 43375 1208072 757326 256 128 8486 49372 1173737 1219045 256 256 7619 38995 1319408 1985448 512 4 4498 3295 247098 254718 512 8 11062 16503 824431 840566 512 16 15956 35640 539595 755409 512 32 24073 47623 977103 1055375 512 64 10905 29658 415550 1176828 512 128 9268 19309 1406520 181500 512 256 6281 14140 1541840 1180062 512 512 7371 23432 1137555 1734911 1024 4 2039 2683 617998 585081 1024 8 2807 4469 195271 153015 1024 16 5450 8826 438136 484114 1024 32 9408 15606 785213 821876 1024 64 9796 17180 907105 926676 1024 128 11897 35522 258845 710639 1024 256 10237 32812 767122 583808 1024 512 14526 20186 1537868 187064 2048 4 2631 3192 339969 181353 2048 8 12891 10333 200841 465054 2048 16 7192 13178 463749 528943 2048 32 13682 16614 327724 1040724 2048 64 14035 18589 606813 204820 2048 128 17211 24662 530151 447560 2048 256 37201 54194 528130 454402 2048 512 35578 61418 1186650 603954 4096 4 3458 4225 170547 168248 4096 8 5068 6005 277171 176149 4096 16 766 8105 324872 178918 4096 32 17174 27631 374478 257234 4096 64 18281 17044 469988 475886 4096 128 15174 55440 943958 149053 4096 256 31572 53600 679830 588174 4096 512 19370 45719 556526 653803 8192 4 3545 4474 214191 273030 8192 8 4764 5926 164514 214681 8192 16 8495 11788 334532 436581 8192 32 13341 17520 362862 655935 8192 64 15110 17204 973258 850324 8192 128 17327 28522 630537 637604 8192 256 11841 24646 380208 618361 8192 512 13837 36761 531565 508913 16384 4 2812 6855 193454 166912 16384 8 5207 4882 222945 262425 16384 16 12496 13420 397631 298276 16384 32 18101 17017 304620 400174 16384 64 21180 20648 283440 208936 16384 128 13156 18279 356011 313162 16384 256 19491 20420 429779 603237 16384 512 20415 23721 623437 528498 32768 4