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 17 15:25:37 2026 Auto Mode Machine = Linux oleg101-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-oleg101-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 1351 8103 463774 481234 64 8 8712 6587 659861 162411 64 16 3819 30965 561808 243411 64 32 2311 26207 645579 566551 64 64 2267 28827 503814 955947 128 4 4897 7765 770474 440128 128 8 2565 8811 927549 795593 128 16 5046 25983 529038 702889 128 32 11648 26283 731625 1000121 128 64 7490 44706 1220700 233137 128 128 11157 97333 1111981 1827299 256 4 4275 12234 318069 247075 256 8 6428 6718 812329 318825 256 16 11649 16654 980760 821025 256 32 7510 98763 1201314 474098 256 64 10198 85708 1219045 682691 256 128 26356 103815 725106 1897721 256 256 22206 134103 933846 595264 512 4 7694 9420 407043 516122 512 8 12980 25050 750656 603767 512 16 3931 22199 191691 163682 512 32 28509 35078 1158418 951980 512 64 23863 60414 925717 1047141 512 128 44122 31041 855978 1273861 512 256 14151 98763 1433753 139240 512 512 18727 68717 739795 1718254 1024 4 5427 2994 264130 104745 1024 8 15282 6024 386383 437244 1024 16 15248 15964 376460 341227 1024 32 14652 82280 747496 536951 1024 64 30665 18900 973516 1080275 1024 128 11423 36699 808265 517665 1024 256 17110 13166 1446211 356908 1024 512 18650 29278 1021928 140796 2048 4 3983 8921 218752 370546 2048 8 8740 9610 257254 228852 2048 16 8052 15569 491814 390313 2048 32 15141 11898 332198 404426 2048 64 17564 46450 727294 486466 2048 128 22221 28770 1051810 625732 2048 256 29984 72369 569216 420275 2048 512 34944 71445 608403 632878 4096 4 6680 6933 381479 188893 4096 8 6842 8582 340790 164815 4096 16 9430 17606 605739 755564 4096 32 14457 15654 314547 188634 4096 64 25349 38424 655474 247267 4096 128 24922 33496 326975 712095 4096 256 24375 43546 1021164 449913 4096 512 32726 53485 803894 910008 8192 4 5209 5443 194713 157302 8192 8 8065 11516 453972 665540 8192 16 21875 25028 769056 632778 8192 32 25071 29423 299392 394872 8192 64 22163 24642 545264 568532 8192 128 25124 37306 582311 658525 8192 256 28050 46999 796271 805738 8192 512 37116 60130 1049190 679491 16384 4 6613 7220 404832 222929 16384 8 12343 15271 429730 596627 16384 16 19196 20868 765823 628529 16384 32 25311 23822 582478 400030 16384 64 24283 43017 904443 593818 16384 128 31000 39261 718568 705207 16384 256 34328 61140 706025 302829 16384 512 47845 37620 285868 342552 32768 4 8166 6650 411110 188506 32768 8 9876 14464 523633 421671 32768 16 19327 23021 636445 430392 32768 32