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: Mon Aug 24 10:57:28 2026 Auto Mode Machine = Linux oleg409-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-oleg409-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 2765 10691 561808 96531 64 8 2081 7841 763021 560635 64 16 4231 29599 207157 426897 64 32 4465 25468 621657 969761 64 64 3447 39657 407457 1255511 128 4 3430 5423 494444 509943 128 8 3513 5885 677178 590094 128 16 7629 12121 947186 819893 128 32 6682 36155 1377278 670413 128 64 7287 36729 1152564 539674 128 128 8125 50040 1421023 1487977 256 4 6028 9334 361552 552960 256 8 3982 10636 780445 682691 256 16 9716 17318 933846 817898 256 32 12981 41471 1262029 750445 256 64 5525 45277 958864 1158540 256 128 8282 37123 987979 1241598 256 256 15733 67561 1407621 1790149 512 4 5515 5642 80933 354323 512 8 8428 13639 668205 505432 512 16 12693 42848 878027 376236 512 32 9351 10043 1055375 790153 512 64 19272 44283 1190529 565751 512 128 18677 39390 802555 833713 512 256 16643 62438 53489 1062161 512 512 21015 51565 177848 1834193 1024 4 4265 2811 547003 211963 1024 8 13192 6530 222654 273133 1024 16 22100 20573 692870 436489 1024 32 8055 19613 620677 942952 1024 64 20733 24056 1005892 1030263 1024 128 21566 41818 228628 1129123 1024 256 18485 36079 346401 407615 1024 512 23505 72337 429376 1391395 2048 4 6607 3422 144490 191684 2048 8 3661 5036 413060 170652 2048 16 8423 7310 917159 153167 2048 32 14597 17772 1076189 922576 2048 64 18404 16667 613531 229231 2048 128 16284 33951 1229274 692133 2048 256 40137 38875 333281 886583 2048 512 23926 28100 335023 556963 4096 4 5941 5097 321884 298760 4096 8 10592 8665 427022 355736 4096 16 12077 14686 518030 439104 4096 32 22968 21103 326062 397518 4096 64 17592 26809 453105 375198 4096 128 38552 55630 489429 505293 4096 256 17542 52482 745272 451189 4096 512 41953 59247 891404 617252 8192 4 1910 6198 159953 161069 8192 8 9451 9724 577146 415334 8192 16 11985 15363 365129 460612 8192 32 14698 32247 378749 475700 8192 64 20036 31063 649488 487242 8192 128 28910 26479 426152 456706 8192 256 27601 40598 713526 571825 8192 512 33499 48675 393962 636871 16384 4 5680 5494 239657 292995 16384 8 10269 10799 463126 323596 16384 16 14551 16526 549871 350527 16384 32 17810 22715 808295 354641 16384 64 28145 32697 848956 726238 16384 128 31821 31675 607643 380793 16384 256 26299 38096 526901 682127 16384 512 27568 50527 780789 572143 32768 4 5852 5848 277779 163821 32768 8 8876 9015 506545 310173 32768 16 15144 15160 458466 441296 32768 32