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 Jul 30 01:16:01 2026 Auto Mode Machine = Linux oleg326-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-oleg326-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 2758 7112 818885 695778 64 8 5165 13138 55077 771797 64 16 4655 37670 1210227 780776 64 32 3745 68151 1336792 1232453 64 64 2775 94095 1255511 821391 128 4 2160 8446 766076 684081 128 8 3406 4535 1007629 876086 128 16 4682 6830 1076312 1032829 128 32 4222 35744 1000121 1196221 128 64 18626 37384 1455701 1526043 128 128 15196 84602 1467639 1504659 256 4 5903 7665 670332 320730 256 8 4806 7493 822913 844265 256 16 4553 37307 1312954 842278 256 32 5583 67941 1137672 1058076 256 64 18343 85334 1400278 1147398 256 128 6006 98918 1430119 1673001 256 256 12880 18369 76878 2228578 512 4 3028 2880 732228 609594 512 8 2283 8469 100060 394772 512 16 4034 4880 1113374 380637 512 32 8673 12482 843537 746222 512 64 6134 11439 1467055 1240025 512 128 6500 21175 1616100 279627 512 256 11581 68770 1326585 1695195 512 512 8444 24245 1729323 2160868 1024 4 1507 4481 506912 412271 1024 8 2297 5157 85704 195529 1024 16 131 6515 1142945 1025099 1024 32 4830 14131 974179 466904 1024 64 12516 13229 274074 1268896 1024 128 7043 11205 340875 1321200 1024 256 22196 26234 989440 548750 1024 512 10400 11047 915028 919140 2048 4 3037 3597 728528 210265 2048 8 6157 9336 571298 944695 2048 16 11846 12719 1177057 1058942 2048 32 10540 16331 137016 1140336 2048 64 13454 26333 459310 475506 2048 128 11637 30726 448916 366702 2048 256 32634 40965 485861 330219 2048 512 31250 36919 1737163 1469167 4096 4 4066 4237 118098 72020 4096 8 4694 5630 176718 208904 4096 16 5622 6333 161184 183907 4096 32 9235 14141 397095 499272 4096 64 15016 15592 741220 670072 4096 128 30770 28419 680261 277767 4096 256 19554 18155 821185 272541 4096 512 27287 40238 1837653 319252 8192 4 3325 3790 208526 174398 8192 8 4237 4089 107680 128726 8192 16 6543 11196 308225 247515 8192 32 7800 20131 845158 445895 8192 64 34015 49946 1097236 821751 8192 128 46484 51985 851019 759771 8192 256 41792 51500 392750 256441 8192 512 14369 29665 997820 504564 16384 4 4824 6197 131557 95217 16384 8