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 Sep 11 04:36:10 2026 Auto Mode Machine = Linux oleg139-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-oleg139-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 3669 7649 555990 104579 64 8 2308 8109 180302 645579 64 16 3127 21011 866463 608965 64 32 4511 47203 998622 874936 64 64 3420 30650 1049372 232854 128 4 3664 2151 10854 472262 128 8 4855 5253 370816 379734 128 16 2178 14250 568836 289604 128 32 4038 25098 857887 794416 128 64 2864 13482 1048974 1440082 128 128 5344 68158 1346196 757430 256 4 5765 9230 557844 439732 256 8 9420 21174 882426 527947 256 16 3865 12426 389629 465466 256 32 5095 15764 1080434 980760 256 64 10676 15102 1213534 1152323 256 128 13730 55808 1274008 1422540 256 256 13424 93297 1607865 1471270 512 4 4567 7479 262438 490987 512 8 10564 13460 392033 684608 512 16 16730 9160 299058 483470 512 32 10441 20835 521385 332695 512 64 11842 30121 930933 642419 512 128 16975 28482 350220 1300082 512 256 11858 36956 1267097 1270846 512 512 19824 29695 395062 1815584 1024 4 6058 8949 134613 248051 1024 8 9216 13049 433187 269618 1024 16 12998 35766 291484 317421 1024 32 24075 35987 857654 511987 1024 64 27746 50927 810859 474068 1024 128 16027 44052 337500 689090 1024 256 29205 71333 1424152 713117 1024 512 32410 49514 1078919 558600 2048 4 4435 5098 293033 303361 2048 8 15437 8757 382730 461779 2048 16 17782 22708 270610 356416 2048 32 25072 15866 452487 293494 2048 64 23302 38691 561404 558811 2048 128 30952 57916 675904 313583 2048 256 33349 71098 953398 794716 2048 512 45407 59446 586992 565767 4096 4 5465 3999 372359 266268 4096 8 13624 6680 239404 202791 4096 16 16698 12737 383301 321258 4096 32 18689 43387 345979 640590 4096 64 15113 31365 731562 309832 4096 128 32534 54856 970844 283520 4096 256 26524 50514 521775 709155 4096 512 39675 35285 533605 767033 8192 4 6509 7148 272584 224900 8192 8 2505 11216 230441 271870 8192 16 10112 22057 276319 317162 8192 32 21734 21784 798751 774429 8192 64 22290 31395 622867 554030 8192 128 26805 30964 495376 378820 8192 256 24351 40292 800799 257894 8192 512 31924 58033 874364 1005764 16384 4 5854 6928 446236 541261 16384 8 13538 19074 574958 430738 16384 16 15237 28285 676747 505227 16384 32 16211 19569 285415 355479 16384 64 15920 23457 410513 332974 16384 128 15882 20858 614000 774803 16384 256 24770 34263 620280 538964 16384 512 30987 37007 833622 866742 32768 4 5577 6207 300356 243069 32768 8 10032 12811 260883 407927 32768 16 15974 20606 332403 294512 32768 32 17892 21893 753561 666555 32768 64 21992 28130 668286 584431 32768 128