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: Fri Jan 16 02:11:38 2026 Auto Mode Machine = Linux oleg217-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-oleg217-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 1911 3054 277078 236965 64 8 1641 25517 45071 365812 64 16 3298 44785 481234 481234 64 32 6789 11797 211899 571375 64 64 2718 36507 955947 818885 128 4 5132 7610 240124 231828 128 8 5377 16070 383258 210553 128 16 6016 29962 484625 551312 128 32 3074 42854 809997 739689 128 64 6887 41953 1015251 940549 128 128 8436 44198 1336145 1492113 256 4 6964 11183 223379 85619 256 8 8331 9433 405062 342631 256 16 7843 46654 66117 404299 256 32 4083 31675 812329 1312954 256 64 2348 21014 1012194 1028679 256 128 8507 62063 1304976 1437779 256 256 10551 71152 190049 1471270 512 4 7189 8777 184510 242084 512 8 7308 16904 123583 78807 512 16 8780 14051 355084 202138 512 32 20136 27014 170100 102033 512 64 11022 35118 312188 498625 512 128 13854 49511 1375881 1368865 512 256 13715 39591 1426135 1442420 512 512 8526 50389 282088 592604 1024 4 3653 4141 150211 59618 1024 8 12727 20123 345010 245205 1024 16 13119 19293 223140 598784 1024 32 12368 45478 365193 424537 1024 64 20087 36012 168147 893517 1024 128 34231 54809 1169078 867704 1024 256 28567 66828 1315938 1038483 1024 512 23012 65873 850521 751813 2048 4 5928 8270 72515 53853 2048 8 9247 8470 145701 218496 2048 16 9923 12647 407805 206912 2048 32 18417 49280 204718 779924 2048 64 23603 37411 331174 1019358 2048 128 18353 74173 976705 423675 2048 256 36075 54791 872978 706478 2048 512 36252 72691 1138975 1091644 4096 4 9498 8501 140606 120187 4096 8 8671 8305 181270 78239 4096 16 29177 24104 468425 238196 4096 32 25330 22226 291902 196122 4096 64 34520 41133 497811 608076 4096 128 36799 38177 716072 378104 4096 256 44469 81406 872969 1182713 4096 512 35271 56340 1704554 1408554 8192 4 4920 4386 104263 128756 8192 8 8360 10636 102425 142866 8192 16 12908 17399 306918 320765 8192 32 14286 17153 321582 342748 8192 64 16865 22744 555804 396284 8192 128 26407 39359 434587 242581 8192 256 25934 29940 337731 259495 8192 512 24383 39037 586906 222475 16384 4 4281 5548 160635 144547 16384 8 10152 8754 138204 120078 16384 16 9787 15988 197941 528888 16384 32 16188 22374 543667 702151 16384 64 15798 46305 398094 786968 16384 128 22910 30747 546130 515672 16384 256 20533 27421 770002 357972 16384 512 33901 28495 528380 279719 32768 4 5408 7690 177515 104459 32768 8 8059 6320 130517 129446 32768 16