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 29 23:49:09 2026 Auto Mode Machine = Linux oleg211-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-oleg211-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 2992 9211 538156 587635 64 8 3716 7883 743988 120764 64 16 4401 8814 998622 855419 64 32 5366 34953 926260 916769 64 64 3772 38234 926260 1452528 128 4 3649 10985 132077 152398 128 8 5554 13240 761728 558771 128 16 6530 34371 907174 343310 128 32 7980 56909 1196221 978253 128 64 4619 42270 1074159 1471662 128 128 8703 47373 595328 1997245 256 4 5948 7776 390337 135320 256 8 6564 10324 833776 289589 256 16 7847 22047 815414 467086 256 32 19483 26508 1306564 1093639 256 64 9264 15320 470566 499925 256 128 13673 50484 1032636 1479379 256 256 7403 93492 1300235 1298662 512 4 7117 6120 263760 104338 512 8 14561 19556 758344 190975 512 16 17837 26873 1089094 853257 512 32 18034 43050 1144832 762112 512 64 21270 58049 1387437 1105920 512 128 20980 50849 196246 873740 512 256 22035 46562 1605228 1547395 512 512 22406 152826 2007358 2007358 1024 4 8832 9395 615430 163426 1024 8 6469 7341 490192 264748 1024 16 19854 28097 835953 457358 1024 32 31956 61126 842843 397505 1024 64 23144 61199 1261072 375243 1024 128 23391 56892 1049138 764119 1024 256 26606 63389 860403 1294520 1024 512 20446 48303 359026 1718120 2048 4 5423 8685 149087 279631 2048 8 8189 11488 344385 672570 2048 16 20686 26017 625186 766150 2048 32 29088 22583 487045 303447 2048 64 20861 36181 322326 628801 2048 128 38798 53633 895455 482585 2048 256 42956 60510 1582579 434168 2048 512 37632 72812 874132 130687 4096 4 5421 7929 368249 319549 4096 8 11451 13615 502441 347645 4096 16 15956 23730 672564 498895 4096 32 15960 19352 686321 588920 4096 64 15209 51306 485131 687227 4096 128 10741 20443 1487846 1134298 4096 256 24353 59266 717208 646861 4096 512 25639 37987 865754 1330761 8192 4 5594 5316 198541 222704 8192 8 6728 7386 309667 275926 8192 16 13013 12834 469024 279143 8192 32 20440 22911 411701 921993 8192 64 29187 24610 605374 506117 8192 128 30318 46163 920634 677869 8192 256 32897 38688 481736 483022 8192 512 36341 43385 867608 742434 16384 4 6413 5169 178515 202973 16384 8 7738 8981 360390 294264 16384 16 13476 15682 248660 243624 16384 32 14405 13329 606458 293562 16384 64 20007 20545 520705 575420 16384 128 21632 32724 1443904 403945 16384 256 27926 40532 482750 606233 16384 512 29774 45153 861180 599135 32768 4 5584 5552 234726 265590 32768 8 11528 10265 368051 651709 32768 16 14110 16152 663226 609502 32768 32 21060 18480 443504 318782 32768 64