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: Wed Aug 26 19:09:08 2026 Auto Mode Machine = Linux oleg342-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-oleg342-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 4 817 5755 451299 492717 64 8 3879 12665 681644 645579 64 16 4296 21384 512471 842003 64 32 1525 41774 188798 799377 64 64 2841 27552 315507 1734015 128 4 4371 3295 445978 372102 128 8 4092 12607 361576 711270 128 16 3778 8301 711270 306292 128 32 6529 21347 310724 363535 128 64 4193 30643 1254941 1421023 128 128 4379 18259 1521718 232330 256 4 6302 6739 467290 200932 256 8 6610 11043 591330 670332 256 16 9075 24840 1027695 1024752 256 32 6877 11843 1153561 682691 256 64 9015 55614 1219045 612584 256 128 6364 36302 1570244 1361224 256 256 11385 34693 753077 2210228 512 4 6142 6760 702295 348063 512 8 4602 10177 399100 327569 512 16 8504 26670 605982 1036527 512 32 14225 38638 722133 1155924 512 64 9280 23582 1147892 1358474 512 128 21362 38888 1652157 1395552 512 256 20566 91200 994294 1753325 512 512 9383 23401 1655979 1629590 1024 4 3631 5176 555924 186318 1024 8 12079 12053 405728 329045 1024 16 14153 11759 719087 681761 1024 32 11647 34429 1116792 241157 1024 64 14204 51359 626745 1086012 1024 128 18021 39507 653047 1185209 1024 256 30636 77377 1301187 1033237 1024 512 21165 32514 122678 1515083 2048 4 4977 5009 408290 92661 2048 8 13370 11253 283030 278218 2048 16 10419 28318 1127168 243749 2048 32 19666 24376 1101159 807263 2048 64 22333 29587 664094 994112 2048 128 22879 54101 350440 812686 2048 256 34744 53304 490186 486218 2048 512 33714 50990 452487 770549 4096 4 8289 5861 398912 230047 4096 8 15456 13581 518812 286375 4096 16 20382 24991 472106 350025 4096 32 29712 32985 852607 784655 4096 64 34448 31802 568741 655775 4096 128 30196 29929 1293781 335185 4096 256 23742 41255 583559 647373 4096 512 28129 46247 334370 423715 8192 4 4023 6389 383484 356607 8192 8 14005 11347 508725 177900 8192 16 14169 20986 620606 290424 8192 32 11742 16652 292560 345786 8192 64 23438 38459 970729 715965 8192 128 26728 32091 721119 464899 8192 256 22415 37027 556443 279811 8192 512 20747 30074 965681 396613 16384 4 4770 6082 277826 224426 16384 8 8614 9437 327916 344194 16384 16 14207 18614 570272 297452 16384 32 19152 30832 660118 489455 16384 64 21193 31364 659554 498054 16384 128 25742 33570 754398 556145 16384 256 26051 38796 460988 249322 16384 512 27559 32555 425005 521551 32768 4 5028 6829 279812 267149 32768 8 13774 15959 613931 424818 32768 16 17003 19115 620075 538919 32768 32 23248 23171 605525 610297 32768 64 23729 35799 684621 509231 32768 128