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: Sat Aug 22 17:20:43 2026 Auto Mode Machine = Linux oleg232-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-oleg232-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 2343 10163 537079 477808 64 8 3887 12239 809014 640954 64 16 1949 23105 760859 760859 64 32 5098 74590 952555 1017549 64 64 7466 45352 261173 1722886 128 4 6000 4648 506097 128659 128 8 12346 25543 558771 864797 128 16 8329 15395 400110 735635 128 32 11328 54033 1133103 948860 128 64 5437 100938 1911894 1266785 128 128 15613 97350 1471662 1598754 256 4 4660 11660 525621 185646 256 8 9031 24210 823544 653204 256 16 6030 13037 859127 263636 256 32 15505 30828 360581 379306 256 64 17159 64938 1142514 1070737 256 128 25966 78987 1256123 616807 256 256 17518 82501 1471270 281319 512 4 7046 8759 315861 324060 512 8 4149 10452 600895 696600 512 16 18654 26620 827289 780390 512 32 16233 58883 616242 743123 512 64 34006 72172 1042566 720195 512 128 19250 73479 549396 485767 512 256 37032 186045 633699 1455126 512 512 21983 57086 844865 1999881 1024 4 7510 12695 436134 449320 1024 8 10811 12413 1005892 685023 1024 16 16545 12820 882683 245275 1024 32 21516 42153 246740 915223 1024 64 32977 44403 1268896 647241 1024 128 38024 38535 1273788 685351 1024 256 47239 61557 785932 691420 1024 512 48154 82421 1587902 1456510 2048 4 8561 10135 374831 239475 2048 8 14331 8821 570009 122355 2048 16 15276 23734 511982 1042239 2048 32 18316 22303 1085299 596034 2048 64 26523 43518 983639 306949 2048 128 19242 18302 223918 348960 2048 256 26376 43881 1443248 380526 2048 512 36201 53698 359053 1395193 4096 4 5588 6399 357349 268961 4096 8 11955 12058 257562 251058 4096 16 12547 15997 352886 384708 4096 32 25893 32111 484789 296876 4096 64 28533 36502 684244 570877 4096 128 19284 27684 183899 610713 4096 256 23452 32309 421097 279625 4096 512 38172 46918 733279 229985 8192 4 5146 4785 388800 262960 8192 8 7072 7931 461571 273796 8192 16 20001 21547 433327 345915 8192 32 20935 32024 307382 406269 8192 64 26113 42806 515774 269740 8192 128 27535 38927 719925 630352 8192 256 35028 60869 948461 583309 8192 512 33130 55988 470966 439862 16384 4 6847 8907 437852 261753 16384 8 11360 11985 580539 475587 16384 16 19677 23065 707239 509343 16384 32 23774 29176 813991 582724 16384 64 24690 38219 884616 679154 16384 128 35719 39911 783058 608030 16384 256 35266 45924 871070 730577 16384 512 41250 47616 1109581 732407 32768 4 5996 6563 311299 283929 32768 8 14332 15182 323966 266287 32768 16 16587 30233 1252030 322456 32768 32 26015 34534 332555 385882 32768 64 32852 44180 1414362 715411 32768 128 36247 43780 483540 738931 32768 256