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 19:32:21 2026 Auto Mode Machine = Linux oleg313-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-oleg313-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 2583 10546 192178 503814 64 8 2792 2533 608965 432398 64 16 3455 29077 760859 188798 64 32 2207 23147 1101022 842003 64 64 2443 63179 1066042 1599680 128 4 2454 5177 540217 544601 128 8 2505 7512 264493 584313 128 16 4081 29151 955616 564055 128 32 9159 54912 962469 335166 128 64 7916 29534 1032829 727658 128 128 8470 63937 204459 1827299 256 4 6704 10393 537999 475779 256 8 9019 14991 766517 367241 256 16 9003 18750 775373 112471 256 32 5089 25523 713541 414923 256 64 10205 32850 618227 1112909 256 128 11962 53556 799625 1117543 256 256 5717 18466 317224 2061693 512 4 7207 5942 202520 488086 512 8 3578 5821 785241 681782 512 16 11880 9554 175881 488086 512 32 10070 15646 1207261 824431 512 64 7382 31596 1084694 1004057 512 128 11503 64410 896725 875164 512 256 15427 32434 482493 778128 512 512 8232 17741 1387437 876593 1024 4 3280 5225 488574 74370 1024 8 5481 6712 234379 783494 1024 16 10644 10865 371961 193320 1024 32 19796 12344 639626 388164 1024 64 12443 50710 376196 240146 1024 128 31085 37620 1446698 997946 1024 256 31191 49387 1009913 399056 1024 512 11865 71328 573978 1638171 2048 4 5330 6964 272127 347126 2048 8 12545 11208 242053 312807 2048 16 14393 18938 745019 441873 2048 32 23844 39727 566065 589166 2048 64 33206 26535 460122 1250936 2048 128 31044 22030 1381061 766150 2048 256 21288 41206 840353 655379 2048 512 31631 46712 499159 873688 4096 4 5102 6694 210980 250567 4096 8 8443 9632 345825 237462 4096 16 12835 19370 497335 403664 4096 32 17874 21358 725844 554926 4096 64 36440 43642 477831 469449 4096 128 22050 45145 465884 976639 4096 256 38700 48015 702687 772274 4096 512 35377 55192 743787 388028 8192 4 6970 1786 406649 262723 8192 8 10347 11054 516813 378345 8192 16 18441 33843 406168 533819 8192 32 20764 29141 746759 640910 8192 64 19967 36682 309787 1112728 8192 128 21207 30161 972459 729091 8192 256 24298 36913 745463 657932 8192 512 20817 31763 812694 428966 16384 4 6372 6582 393571 275811 16384 8 8423 10995 565063 318965 16384 16 14987 19358 433967 377051 16384 32 19249 22401 973793 694270 16384 64 23103 28119 1413027 508626 16384 128 30457 40549 967868 611003 16384 256 39274 49061 805944 622302 16384 512 31000 45661 571786 600806 32768 4 6101 8130 294588 230243 32768 8 10709 12944 488534 302039 32768 16 16964 17449 368159 527291 32768 32 23407 29713 614266 519600 32768 64 30299 33370 524388 519186 32768 128 30189 35500 832288 784751 32768 256