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: Thu Aug 27 05:49:21 2026 Auto Mode Machine = Linux oleg403-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-oleg403-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 1662 4092 615952 477808 64 8 2778 17311 760859 598110 64 16 3314 9826 121916 735831 64 32 3486 37602 852702 821391 64 64 1725 28082 532815 1210227 128 4 1836 10495 544601 538051 128 8 3378 11363 901083 274641 128 16 7997 26375 1162547 1040839 128 32 4854 26999 1093856 1015251 128 64 5700 54583 1229084 1346196 128 128 7099 92758 1487977 2132084 256 4 3569 8448 547044 358056 256 8 7176 15513 870974 746272 256 16 10498 40277 1062263 991629 256 32 12965 32968 1312954 1094754 256 64 10010 32148 1108314 1260547 256 128 14239 99302 581719 1226004 256 256 8533 52002 1673001 2065659 512 4 7732 7308 548694 352115 512 8 9623 8041 840895 581846 512 16 8744 33751 1236455 693675 512 32 15701 37233 1417662 1132755 512 64 21040 52032 1174254 323864 512 128 17942 43574 934173 773364 512 256 23092 42777 1410215 1380303 512 512 19239 41792 1677976 1809465 1024 4 6112 4913 612446 233209 1024 8 14133 9057 647729 439077 1024 16 9650 10157 122472 218664 1024 32 23338 18356 302957 924084 1024 64 24803 32719 1350701 912695 1024 128 32648 30604 252781 1016847 1024 256 22688 92688 505897 667562 1024 512 35008 92888 667458 1007781 2048 4 8530 5539 140756 104430 2048 8 11645 8219 790692 465457 2048 16 12831 19601 484054 877526 2048 32 19991 23822 1124071 590706 2048 64 12824 36588 232853 465684 2048 128 34772 60807 234615 1162403 2048 256 41798 49437 1435050 1300361 2048 512 35464 47315 373738 1020933 4096 4 5691 5369 244641 170922 4096 8 12019 7933 405867 362415 4096 16 15803 18179 336755 276622 4096 32 17817 35511 707054 848732 4096 64 30984 20404 806308 697438 4096 128 35985 53857 1600091 910249 4096 256 20458 28621 943336 336980 4096 512 31260 52334 505620 343970 8192 4 4385 1975 292907 157175 8192 8 9029 14365 595656 304975 8192 16 16844 21669 588888 595130 8192 32 18061 20155 562593 415374 8192 64 33798 36254 918591 606047 8192 128 33601 41800 1154452 842980 8192 256 34237 38158 873342 333063 8192 512 49994 36770 966605 650459 16384 4 6837 7376 345064 413821 16384 8 10155 10549 309394 257678 16384 16 13165 16812 227685 340475 16384 32 18927 19347 423601 425790 16384 64 18453 27091 683348 329718 16384 128 31944 32977 597759 682039 16384 256 27872 31881 607154 292076 16384 512 28817 39201 895055 566609 32768 4 5343 5463 202204 236184 32768 8 10068 11671 294901 273276 32768 16 12771 18374 422229 310396 32768 32 15287 23927 424659 302681 32768 64