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 Aug 10 22:35:50 2026 Auto Mode Machine = Linux oleg622-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-oleg622-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 2475 10342 249985 551422 64 8 3520 3454 771797 633392 64 16 5442 48160 450541 604849 64 32 4390 17453 1087638 284418 64 64 4959 33614 1101022 1599680 128 4 4279 4433 370816 380003 128 8 2531 10543 889145 183369 128 16 5771 17176 435487 809997 128 32 8095 14535 1015251 870405 128 64 13235 23642 460514 1142750 128 128 7197 57972 1294270 983630 256 4 5067 4433 98042 181044 256 8 8893 14733 812329 351607 256 16 7594 14300 1023775 799625 256 32 5751 8515 42469 914752 256 64 13165 35714 531080 785010 256 128 5915 97225 1415041 1300235 256 256 7456 108614 1487577 597916 512 4 4534 4355 540681 138308 512 8 8258 8128 240943 239572 512 16 6520 20588 195193 173312 512 32 10785 21354 678122 651383 512 64 18539 46356 1055375 1089094 512 128 15510 26990 1483267 772252 512 256 11279 42275 635198 1086890 512 512 23553 128971 1700565 2207515 1024 4 5350 3598 264944 363247 1024 8 11551 12915 368736 454695 1024 16 18635 21579 1091809 461090 1024 32 10784 51074 758586 727244 1024 64 14828 76150 946485 1107005 1024 128 17370 41252 338618 655539 1024 256 24414 97107 585160 1074599 1024 512 23667 37462 907105 853394 2048 4 4728 6530 383379 331660 2048 8 10234 13653 457646 411576 2048 16 15442 11477 323845 242826 2048 32 9872 19341 466620 610609 2048 64 20013 32184 472212 492208 2048 128 17789 39232 615024 639998 2048 256 22485 35017 1251847 1192912 2048 512 23671 42577 439117 627057 4096 4 4610 5641 405025 311625 4096 8 1288 10588 468808 363312 4096 16 10706 11064 202662 478897 4096 32 13757 25852 643807 483180 4096 64 19898 22433 607538 322900 4096 128 21939 35672 490351 936650 4096 256 21329 35779 613812 543670 4096 512 28865 54679 813178 241711 8192 4 5144 6291 395081 358639 8192 8 9985 10101 503566 335381 8192 16 13636 14001 317558 465504 8192 32 18450 30714 670044 616829 8192 64 24831 31185 726747 651087 8192 128 24608 38380 491542 680514 8192 256 25994 42786 484220 588373 8192 512 30760 37992 748059 203290 16384 4 5877 7790 229310 156328 16384 8 8947 7506 623584 304207 16384 16 11417 12320 324467 710956 16384 32 15383 17693 629669 252757 16384 64 25006 43048 500473 358723 16384 128 25471 33090 605982 701578 16384 256 24689 46818 889275 872419 16384 512 39975 43342 795375 644836 32768 4 5502 5819 488033 326439 32768 8