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: Tue Sep 8 07:36:15 2026 Auto Mode Machine = Linux oleg251-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-oleg251-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 1303 4542 627470 500060 64 8 1910 10361 889431 295047 64 16 3365 22168 312204 1033216 64 32 3280 44599 1066042 1232453 64 64 1821 43095 712397 1526887 128 4 2970 8192 323259 663782 128 8 4347 15067 670413 826202 128 16 3980 26262 1102844 1022989 128 32 5122 10429 1294270 859260 128 64 2181 11536 1105114 1152564 128 128 2579 31881 1436229 1827299 256 4 2831 6186 629094 346837 256 8 6720 9588 350689 271160 256 16 4518 11672 1093639 962301 256 32 12511 21110 1112909 850282 256 64 13133 55991 1108314 895676 256 128 9262 28868 1195962 1489641 256 256 14969 40011 514045 1729594 512 4 3759 6551 510478 553502 512 8 8100 15180 105694 334196 512 16 12399 33499 577155 686358 512 32 15911 38095 1153441 154031 512 64 40518 49694 1296159 1082507 512 128 12843 42617 1383861 1233614 512 256 5422 51900 534358 642419 512 512 9934 107541 1580419 1640796 1024 4 4831 4412 606307 382529 1024 8 5645 12106 218664 514564 1024 16 15920 27091 507451 364295 1024 32 13309 33938 1288307 558309 1024 64 25617 35696 1130312 434633 1024 128 11215 30979 1521524 1177088 1024 256 26885 70533 1194770 849848 1024 512 13742 18362 707712 1436056 2048 4 3913 3819 135620 200353 2048 8 8188 14972 910162 289059 2048 16 9324 10963 265426 169113 2048 32 11465 15225 228014 1120990 2048 64 15501 44731 1189279 677236 2048 128 38494 59811 479300 703066 2048 256 45103 74456 506040 424366 2048 512 25541 44230 660672 182987 4096 4 6427 6718 142197 154420 4096 8 7008 9839 154934 260443 4096 16 12922 13104 339443 551417 4096 32 17705 24350 708424 392675 4096 64 17506 21043 520337 501165 4096 128 22066 31067 231716 289736 4096 256 22240 33539 1238920 845058 4096 512 33228 53259 664603 513862 8192 4 5429 4876 176558 78531 8192 8 6007 7479 226529 345435 8192 16 12996 11023 263265 866339 8192 32 11742 22218 344317 368893 8192 64 13100 21909 414403 258593 8192 128 15097 38852 258528 368529 8192 256 27525 28735 655985 765833 8192 512 22630 23991 666392 383878 16384 4 3650 4879 151918 120462 16384 8 8271 7505 179030 389769 16384 16 9799 17938 320124 338443 16384 32 15069 24413 490643 330088 16384 64 20839 24380 361166 252123 16384 128 22932 28210 850322 700798 16384 256 24692 40544 444274 373918 16384 512 35308 30265 418417 576782 32768 4 4174 3780