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: Fri Aug 21 21:11:32 2026 Auto Mode Machine = Linux oleg327-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-oleg327-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 2570 8381 383038 598110 64 8 3422 20538 831569 640954 64 16 5315 11917 1049372 743988 64 32 3985 32550 1304314 1279447 64 64 4592 55509 821391 1452528 128 4 7146 6652 546819 354415 128 8 4645 19629 805138 365764 128 16 10767 33746 1133103 969421 128 32 14883 28262 1359835 1172704 128 64 7806 88947 727658 1294270 128 128 9060 127105 338547 1421023 256 4 9348 10082 108285 320825 256 8 7385 31384 870974 314161 256 16 12760 34051 812944 100870 256 32 21319 45977 1142514 485678 256 64 15249 93975 1169901 1202660 256 128 11526 75135 181197 1361224 256 256 15788 99921 1361224 1778290 512 4 8610 11335 381788 486207 512 8 10041 19982 924123 123108 512 16 10065 20897 427036 770866 512 32 23177 14576 788702 860437 512 64 17557 68605 1185272 86296 512 128 33207 70474 837942 359302 512 256 13970 28401 1484293 625941 512 512 18283 83210 279918 470649 1024 4 4971 7809 84782 594639 1024 8 11352 9734 775712 292079 1024 16 18207 10178 719207 502699 1024 32 14928 22270 1182272 234009 1024 64 36058 80263 611661 1229309 1024 128 36521 35949 1488307 884137 1024 256 17642 79011 723691 493288 1024 512 27655 110464 720655 744257 2048 4 6474 6671 225080 165239 2048 8 6383 10457 281472 398534 2048 16 15950 22415 316728 119807 2048 32 34175 42398 541684 666464 2048 64 26117 31377 373527 552023 2048 128 19603 35957 837649 660012 2048 256 18437 46584 1326465 1168888 2048 512 31610 55634 1302727 452797 4096 4 5950 7071 291823 257400 4096 8 13859 10951 375198 529331 4096 16 16873 17578 267100 443193 4096 32 21094 15503 597606 269615 4096 64 29268 31995 1018440 1163647 4096 128 32701 57383 432755 655149 4096 256 42467 66490 1647031 931117 4096 512 31916 59620 798736 369207 8192 4 6785 7972 290601 286112 8192 8 14772 14222 346998 484644 8192 16 20866 22703 856385 540436 8192 32 24861 33815 443598 400646 8192 64 33229 41253 349028 426755 8192 128 34720 41666 773418 626684 8192 256 42344 44156 445797 344417 8192 512 39123 49843 674344 447504 16384 4 8061 8840 262926 263679 16384 8 14051 14557 539497 349689 16384 16 19978 23836 636098 439627 16384 32 29978 38551 832097 1181258 16384 64 30183 44860 538786 847501 16384 128 31363 43784 853246 797313 16384 256 40961 49691 447687 828606 16384 512 47793 50925 874696 785501 32768 4 7222 8166 245469 148023 32768 8 12104 13136 406832 283656 32768 16 16736 19115 619946 444083 32768 32 20670 28146 337932 337835 32768 64 28425 37254 932182 445586 32768 128