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: Sun Sep 13 07:23:06 2026 Auto Mode Machine = Linux oleg151-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-oleg151-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 3058 4382 151333 467002 64 8 2239 24747 720041 520419 64 16 1900 16606 1017549 926260 64 32 1557 20381 926260 200055 64 64 4014 43713 1029254 1357066 128 4 4561 3444 384356 518312 128 8 2830 17851 805138 380811 128 16 2383 44227 398625 826202 128 32 2715 10981 391360 747933 128 64 9551 57402 1196221 1421023 128 128 5733 50553 1492113 1967960 256 4 4275 3175 482839 412215 256 8 4576 17873 260376 395076 256 16 9680 17883 739590 98955 256 32 7110 27379 800221 815414 256 64 12400 38827 1147398 178013 256 128 10654 41871 1570244 618227 256 256 5740 30902 900936 1778290 512 4 6401 7472 115086 611678 512 8 9410 8345 855978 335292 512 16 7432 9592 1024169 821592 512 32 16363 37716 361115 1066910 512 64 20509 17360 1442420 814117 512 128 9861 34432 1329871 1273861 512 256 15142 17917 1640796 243456 512 512 13185 92385 1700565 774480 1024 4 2642 3979 189382 465639 1024 8 6907 11538 817185 713117 1024 16 7632 19682 246698 883591 1024 32 12015 27852 646948 925678 1024 64 14030 35961 1172909 406496 1024 128 28023 45884 944819 392492 1024 256 9032 33491 1521524 1542286 1024 512 33339 75617 1777861 513764 2048 4 6237 11089 686107 243197 2048 8 11195 16427 326690 275231 2048 16 11027 14238 1149800 1015382 2048 32 18646 17303 883937 1118509 2048 64 15189 35025 1521741 1317918 2048 128 31594 53397 1094007 1348327 2048 256 28100 27459 960541 274528 2048 512 32866 64000 723679 970635 4096 4 6714 5886 261793 313937 4096 8 8173 9233 342817 248017 4096 16 25430 29823 255125 491656 4096 32 15180 18766 563499 204024 4096 64 18295 44343 611343 478164 4096 128 27261 26764 960155 814296 4096 256 24418 39671 776498 657154 4096 512 35638 29897 537462 365157 8192 4 3237 6925 148585 134163 8192 8 9541 12152 805341 388448 8192 16 17332 15094 1130224 768557 8192 32 21059 21891 391136 675351 8192 64 20840 19418 523148 727793 8192 128 27336 50420 770642 390541 8192 256 33052 41066 447282 309074 8192 512 23027 34517 1036155 516068 16384 4 7120 6021 441307 254780 16384 8 7100 8535 493717 463622 16384 16 11072 11788 543181 526732 16384 32 20581 25058 770425 629427 16384 64 41177 21810 821209 210656 16384 128 22139 28148 509011 618126 16384 256 18926 25701 606993 374012 16384 512 21327 31846 518004 364728 32768 4 3777 4458 134677 140668 32768 8