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 Mar 15 16:50:54 2026 Auto Mode Machine = Linux oleg437-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-oleg437-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 1488 5675 515423 560635 64 8 2488 8947 69781 496362 64 16 1931 18312 693980 752329 64 32 4224 42327 1163036 901377 64 64 1355 21170 1163036 1392258 128 4 2661 3666 520321 462100 128 8 5704 19604 325611 710329 128 16 5623 23581 948860 799146 128 32 5452 35300 1196221 1123617 128 64 5230 29553 125854 584313 128 128 5758 54192 1196221 1939522 256 4 4654 4479 256519 462061 256 8 3385 11710 773140 256274 256 16 5431 16923 397563 889002 256 32 6678 13843 690151 917096 256 64 7807 59013 1368162 78171 256 128 12280 49488 1185399 304797 256 256 4633 29469 1487577 1938842 512 4 4524 3557 54099 133129 512 8 6976 13726 474917 307494 512 16 12765 17850 334874 637650 512 32 9216 20791 601737 163011 512 64 12028 9571 1179413 1060063 512 128 7434 21397 1261144 1096322 512 256 17822 62805 1426135 635951 512 512 17438 71102 333781 1635797 1024 4 4916 3269 141361 152159 1024 8 10531 7955 327789 310199 1024 16 13788 18581 482157 200037 1024 32 16934 20497 812086 701355 1024 64 19914 44465 835303 1194770 1024 128 20672 31922 508171 1148139 1024 256 23192 27726 401256 704230 1024 512 21489 61682 679067 478771 2048 4 3507 3640 264160 161068 2048 8 4630 6184 432615 202193 2048 16 11879 8114 332958 612088 2048 32 23855 38204 1153815 565432 2048 64 24748 42161 604507 1122162 2048 128 29655 31091 395980 1317109 2048 256 40079 30828 325021 1352786 2048 512 34560 73465 987484 1117927 4096 4 5338 9197 299067 287737 4096 8 9004 8356 303902 552855 4096 16 11533 10245 222126 251893 4096 32 17940 28853 1056780 418594 4096 64 36021 33942 624114 412900 4096 128 29829 60154 670386 796403 4096 256 29838 27890 947917 1180032 4096 512 31895 46252 1699495 780768 8192 4 5244 5074 117933 193559 8192 8 11025 12280 456657 502329 8192 16 18466 13152 716906 570193 8192 32 11860 16506 517763 344912 8192 64 22154 33652 502175 787384 8192 128 17814 19443 754465 602223 8192 256 19220 30495 778182 717085 8192 512 23922 38020 729214 463845 16384 4 3580 3839 296881 229773 16384 8 5526 5732 475725 419060 16384 16 9659 10222 346340 446271 16384 32 12824 17397 433072 379901 16384 64 18640 16757 468595 316007 16384 128 21747 23158 506038 308822 16384 256 19820 35430 843278 775975 16384 512 26499 24233 345807 521120 32768 4 4140 6010