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 Oct 23 14:58:34 2025 Auto Mode Machine = Linux oleg306-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-oleg306-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 5864 13220 29315 234481 64 8 5412 27948 538156 402569 64 16 7963 44725 659861 778512 64 32 6001 70164 598110 799377 64 64 7595 81127 1049372 1304314 128 4 7776 17236 223807 228571 128 8 12744 27287 488150 378663 128 16 13109 48985 584313 650117 128 32 15230 64778 907174 780556 128 64 9818 76873 1085013 1206978 128 128 6213 99221 927549 1579934 256 4 9178 10010 267245 262028 256 8 13785 25384 591005 425277 256 16 14820 12529 591005 670332 256 32 17829 66929 744204 901693 256 64 21433 65389 1312954 1142514 256 128 20511 54052 1579483 1345868 256 256 11598 67383 1610276 2065659 512 4 7037 11516 261098 267639 512 8 16718 17326 480334 277352 512 16 25250 48193 644927 708318 512 32 31175 57801 730484 919375 512 64 34872 66589 1105920 1057974 512 128 20669 94031 887461 1071167 512 256 21234 116232 1652157 1605228 512 512 41819 119100 1795846 2287463 1024 4 12066 5418 161739 283275 1024 8 21795 24456 468841 342697 1024 16 27072 40541 564547 641154 1024 32 43647 67529 226901 890369 1024 64 28736 18305 1299612 1196434 1024 128 40909 75305 1420384 942952 1024 256 49752 86948 1414304 1565332 1024 512 29984 71865 1270397 1612342 2048 4 8680 9927 189770 125969 2048 8 25528 25327 400000 271757 2048 16 34233 32052 682401 480641 2048 32 14692 22894 311773 680185 2048 64 37819 53531 355855 261825 2048 128 39610 43941 1349174 1070022 2048 256 61774 129924 1666393 1019358 2048 512 67024 92389 1116038 669268 4096 4 11000 10527 145522 133747 4096 8 13317 23715 195878 139030 4096 16 23857 28245 209118 574965 4096 32 30821 76489 1227062 658615 4096 64 60918 52684 1223392 1042480 4096 128 48031 83687 509443 874836 4096 256 54650 72115 1498749 1372105 4096 512 48209 38522 1788674 1084464 8192 4 9304 10180 164735 157181 8192 8 21106 17016 359408 351273 8192 16 22584 26069 544245 356518 8192 32 29918 27123 286453 629520 8192 64 35217 48553 936773 363830 8192 128 56098 43616 1214519 1165653 8192 256 27848 58631 1433399 1420480 8192 512 42716 75305 874654 1389855 16384 4 8590 3624 194284 258206 16384 8 11211 17565 305450 375108 16384 16 21321 24435 430137 278091 16384 32 16919 20626 660644 435719 16384 64 18607 29437 901465 342826 16384 128 41031 59002 1092192 988530 16384 256 45761 48072 874562 1051209 16384 512 28930 57321 954002 1101153 32768 4 8950 9615 169222 141659 32768 8 15192 20696 354325 261405 32768 16 23566 24787 521184 495456 32768 32 40818 43243 744136 651049 32768 64 42596 53618 975908 925908 32768 128 49469 63423 1391014 766753 32768 256 59720 70539 1259234 1020812 32768 512 49347 89334 1125240 810826 65536 4 10539 12175 202997 132596 65536 8 15133 18056 438546 247268 65536 16