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 16 03:36:14 2026 Auto Mode Machine = Linux oleg258-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-oleg258-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 3701 4791 216165 371894 64 8 2657 7269 546928 608965 64 16 1390 12410 473593 615952 64 32 823 43360 1066042 913649 64 64 3483 40630 1484662 1562436 128 4 3896 4844 589446 482881 128 8 7214 22448 780556 289604 128 16 6183 4008 1015251 785122 128 32 5569 64320 92551 770474 128 64 8173 42147 1133103 1266785 128 128 10147 96754 1471662 3359523 256 4 5038 5838 337675 134523 256 8 5298 9346 556687 333273 256 16 5157 16074 651223 794889 256 32 6575 37774 438475 1058076 256 64 10599 97375 1439707 1260547 256 128 10850 36718 1137672 1361224 256 256 11062 131283 1471270 2045979 512 4 4850 4743 50532 403449 512 8 6063 5126 915847 524569 512 16 6712 32076 982917 847532 512 32 17441 42471 1394645 570258 512 64 29686 39299 702295 261639 512 128 19002 70476 1562027 1329871 512 256 26168 110060 1695195 370779 512 512 18939 73998 854615 2091421 1024 4 4798 5687 223582 167786 1024 8 6032 6645 137321 274091 1024 16 18714 9975 253722 1019019 1024 32 11120 28379 728849 631723 1024 64 26449 37364 1221964 998874 1024 128 17506 21296 687326 1101046 1024 256 25441 46685 918354 544921 1024 512 42193 83695 539514 340308 2048 4 5426 8312 165121 171480 2048 8 4976 10872 370003 188948 2048 16 7052 13046 521240 428109 2048 32 14390 39422 1090535 569216 2048 64 27563 41424 441759 916376 2048 128 24826 54374 731693 1199074 2048 256 21502 33143 1047067 300380 2048 512 35223 49620 1319537 541650 4096 4 3866 1410 339410 174832 4096 8 9973 10057 185556 156904 4096 16 17810 22153 543515 304150 4096 32 15694 18139 274883 441519 4096 64 12021 37247 687695 475793 4096 128 24649 42294 354021 788436 4096 256 31069 39681 785551 336729 4096 512 35590 43348 824654 1049677 8192 4 4417 4591 231014 128837 8192 8 6806 8468 543522 355584 8192 16 13482 17079 614699 302678 8192 32 17229 28417 564961 514546 8192 64 22480 29972 655722 602529 8192 128 22261 21228 277919 277910 8192 256 20319 40983 930180 609292 8192 512 26207 47977 724953 762400 16384 4 4020 5308 253124 279915 16384 8 8490 9625 755434 440620 16384 16 12387 10014 331962 320388 16384 32 10850 20709 677027 711847 16384 64 22916 23076 520126 510072 16384 128 36244 34818 647845 651062 16384 256 33513 40812 828896 861904 16384 512 29635 50903 1110405 657226 32768 4