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 Mar 2 11:56:06 2026 Auto Mode Machine = Linux oleg323-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-oleg323-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 1782 9090 763021 546928 64 8 8938 27924 842003 743988 64 16 2620 11171 565358 926260 64 32 3754 18028 1119387 718114 64 64 1926 46076 1562436 1484662 128 4 3534 9746 574312 334331 128 8 2731 11475 852438 715059 128 16 7311 20275 267658 711270 128 32 7500 29969 1206978 723735 128 64 8981 32365 789741 962469 128 128 8778 98313 1196221 1967960 256 4 2903 6157 274347 279198 256 8 5147 9278 480248 89138 256 16 5011 9481 489442 563701 256 32 5483 18720 1213534 1003679 256 64 3686 48658 1185399 1168627 256 128 19763 13384 1340826 1407621 256 256 4367 63006 1673001 2081678 512 4 6274 9342 109588 407275 512 8 12832 14771 701378 321633 512 16 18376 28014 884536 683736 512 32 17756 43626 687237 1105351 512 64 22402 39092 1296159 835334 512 128 18095 33051 115030 473660 512 256 26506 58519 1296159 748563 512 512 46377 53244 2071249 826016 1024 4 2938 13474 574669 507631 1024 8 10433 10509 262035 206619 1024 16 12247 24124 174359 297254 1024 32 15453 12422 1125277 996094 1024 64 14490 39526 474277 421744 1024 128 22272 41210 328290 362205 1024 256 11052 36649 957884 1395010 1024 512 19747 62641 615341 226601 2048 4 6593 6222 285875 239809 2048 8 15007 13688 300727 348535 2048 16 16499 26631 644657 664917 2048 32 23038 31046 648747 551279 2048 64 21372 16627 1343897 714351 2048 128 20795 22898 733755 1267362 2048 256 26598 57680 613356 785271 2048 512 17436 58947 1543340 804089 4096 4 1552 4951 254853 113270 4096 8 5644 6168 858529 252712 4096 16 13255 18754 520984 589769 4096 32 18541 21234 684026 680962 4096 64 31470 28921 1496008 837600 4096 128 33050 54698 959940 965388 4096 256 45332 62251 1059778 1504787 4096 512 37441 50730 878414 1557444 8192 4 6087 3957 191356 113164 8192 8 8399 7926 249862 515124 8192 16 9909 18167 889162 268988 8192 32 11783 21370 866973 390634 8192 64 17652 26858 508093 394586 8192 128 29391 34136 937182 602804 8192 256 30462 38898 929525 421525 8192 512 27373 59492 903304 661606 16384 4 5052 6180 379575 347980 16384 8 10691 11208 581634 512480 16384 16 12554 18834 380599 257768 16384 32 20484 21865 885288 654859 16384 64 24419 36474 1127439 787319 16384 128 29362 38465 636245 380954 16384 256 27148 39719 1360894 701549 16384 512 26195 44000 772243 769235 32768 4 5241 5688