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 Sep 3 14:51:00 2026 Auto Mode Machine = Linux oleg109-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-oleg109-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 4390 25891 477808 453587 64 8 6939 24931 640954 1143223 64 16 9644 53422 1780008 763021 64 32 8378 67078 1279447 760859 64 64 5207 74157 1255511 1734015 128 4 3405 10430 549618 249034 128 8 6130 22594 927549 630273 128 16 9643 30828 1030846 293563 128 32 5538 45134 1155043 1076312 128 64 7517 99923 1332828 1229084 128 128 18443 121551 1543594 2027414 256 4 9977 16053 622890 546765 256 8 13804 25373 792543 479390 256 16 18714 72355 350231 718796 256 32 16137 58797 1237306 1076103 256 64 15561 102722 1190657 1325925 256 128 25863 78216 1532153 1506359 256 256 24513 99959 1662639 1652404 512 4 11091 10852 354791 480764 512 8 11078 20261 227131 745445 512 16 20968 41653 857687 911184 512 32 33229 64402 903136 903136 512 64 25893 87328 1239310 1125040 512 128 39402 111448 1150351 1222379 512 256 41370 123165 1528669 1514652 512 512 20865 113805 2016784 1783912 1024 4 4848 6270 452301 837910 1024 8 18694 17529 904621 412074 1024 16 20071 13204 835140 860575 1024 32 29445 54909 1174513 123508 1024 64 23861 29982 1361404 680357 1024 128 15638 61679 834491 798053 1024 256 33207 90659 1577404 440427 1024 512 53629 29251 1178380 953630 2048 4 3245 4697 453084 399219 2048 8 12304 6537 502458 765059 2048 16 23396 32294 695439 816937 2048 32 28820 44011 1344739 1113579 2048 64 28522 22743 1400881 1174321 2048 128 22094 25464 281086 333929 2048 256 46043 55503 673677 620623 2048 512 44107 44946 1004341 886583 4096 4 6565 5163 226310 128573 4096 8 11140 12176 400436 262661 4096 16 15548 11997 404576 418258 4096 32 12477 14101 1308562 425162 4096 64 12571 20373 378038 609608 4096 128 21691 32125 515806 222765 4096 256 34532 52991 1425146 711475 4096 512 33733 50558 848564 825447 8192 4 8348 8217 302244 361598 8192 8 14310 14581 349458 192147 8192 16 21055 12251 681865 462721 8192 32 33485 15392 413281 357538 8192 64 18981 18704 703591 423406 8192 128 28661 40061 634753 734970 8192 256 29521 39109 504401 316870 8192 512 31409 49569 676242 305420 16384 4 4824 6980 390960 304456 16384 8 11393 17721 279419 312785 16384 16 12022 22932 593238 561769 16384 32 22884 30431 664528 429314 16384 64 27797 24253 347885 340610 16384 128 27675 54676 1001408 913424 16384 256 36361 53454 435052 609119 16384 512 27133 36327 1018220 743405 32768 4 5562 9321 182537 201215 32768 8 7640 9653 431238 407486 32768 16 24482 32459 859440 348747 32768 32