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: Sun Nov 16 20:54:46 2025 Auto Mode Machine = Linux oleg126-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-oleg126-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 1533 4112 224668 230060 64 8 3093 19179 429630 448284 64 16 3924 44942 542506 561808 64 32 5790 14420 743988 863676 64 64 3855 79896 1083249 1249666 128 4 2977 5463 254947 238842 128 8 6507 32225 208185 373136 128 16 9677 51238 595328 458940 128 32 7465 68857 864797 715059 128 64 12387 83718 1032829 883293 128 128 14716 107485 396271 1471662 256 4 8687 11589 88828 137187 256 8 14111 32883 400678 61438 256 16 7105 46749 573946 186581 256 32 10461 75161 864661 723153 256 64 11241 90719 1027695 913973 256 128 17498 33494 1368162 973645 256 256 7646 100993 733527 1752173 512 4 9789 6311 90926 204292 512 8 12878 20884 395644 272772 512 16 21389 25298 601568 570107 512 32 26856 83075 807687 857687 512 64 32830 110292 857687 1086890 512 128 30844 109684 133435 1193175 512 256 31685 41884 1354190 1455126 512 512 32454 146119 1528669 1169140 1024 4 12198 11190 181945 158317 1024 8 8319 14907 421413 283668 1024 16 23173 33380 390245 577917 1024 32 34850 74111 726752 449696 1024 64 21946 39909 1019987 152380 1024 128 18220 85148 1244266 1032244 1024 256 46433 115861 1236742 1329791 1024 512 42508 77662 1597945 1402756 2048 4 5414 8003 252564 166870 2048 8 24316 16771 206489 117498 2048 16 13186 31200 487737 637055 2048 32 21147 19591 194898 306500 2048 64 43731 54011 356298 997576 2048 128 44501 49827 1328928 1172238 2048 256 36895 23479 1322178 1211077 2048 512 40362 54209 1402711 1442279 4096 4 8148 7450 111918 204277 4096 8 15056 17016 323466 181528 4096 16 23289 29321 228827 606466 4096 32 34201 37580 302266 701138 4096 64 30525 77703 900421 445122 4096 128 50392 60049 1315778 524195 4096 256 36138 54883 1401773 668196 4096 512 26582 66923 542948 1384713 8192 4 9883 9781 253637 171556 8192 8 13766 15501 199062 96197 8192 16 23411 29397 261474 505054 8192 32 26548 51395 440358 256320 8192 64 35876 48474 1125117 478282 8192 128 44461 56470 680002 651655 8192 256 40525 51968 774150 764674 8192 512 53090 76583 702454 1107349 16384 4 8631 11328 213686 107477 16384 8 15748 17767 315628 235619 16384 16 19081 19691 205749 395155 16384 32 33347 33630 387696 709664 16384 64 35471 62447 759467 292666 16384 128 49106 65130 970219 836259 16384 256 38756 57407 412042 665719 16384 512 44992 54521 761942 304959 32768 4 7473 9165 121872 113220 32768 8 14411 14028 254486 179522 32768 16 16009 19742 166968 419516 32768 32 21861 34505 415942 304139 32768 64 26265 39157 900791 320397 32768 128 48312 66218 957097 988507 32768 256 45028 64372 467053 1006880 32768 512 54824 79735 504246 586799 65536 4