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 22 13:32:21 2026 Auto Mode Machine = Linux oleg234-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-oleg234-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 4438 13088 467002 620221 64 8 7234 30752 863676 592827 64 16 3323 42923 496362 1083249 64 32 7965 60789 1363961 1105556 64 64 4347 62386 1599680 1599680 128 4 6092 8086 393945 561694 128 8 7513 25718 841746 767171 128 16 14106 51782 913347 410512 128 32 6444 22889 1319723 921183 128 64 9261 67651 1349580 1306873 128 128 12823 78676 814915 1051027 256 4 9299 6899 64859 329489 256 8 7874 24390 917880 615393 256 16 9815 27823 653204 515032 256 32 16500 43551 716876 147455 256 64 9293 104066 1368162 1235882 256 128 26710 126236 1407621 1552085 256 256 23570 130755 1619994 1642294 512 4 8790 12275 608041 563229 512 8 15485 20020 630536 807383 512 16 25485 40334 1103080 1004057 512 32 24292 63792 766464 1057454 512 64 22296 54496 1222379 707385 512 128 30110 32514 1365383 962218 512 256 35317 82182 1135150 1723770 512 512 42234 113552 423499 1759070 1024 4 11812 9178 318906 341336 1024 8 12710 17842 846998 806899 1024 16 24072 31327 371703 1229309 1024 32 12258 46117 1291018 437600 1024 64 36870 51407 331713 1210598 1024 128 48551 85904 1408275 614989 1024 256 45301 107010 1622698 1501313 1024 512 35507 78866 1617808 1654579 2048 4 9338 11039 414336 771379 2048 8 10452 12786 863760 181333 2048 16 25533 22342 474272 262634 2048 32 25686 45587 1318727 386989 2048 64 29700 26201 550855 808174 2048 128 29939 43947 1477506 1022391 2048 256 27359 57602 1613798 769031 2048 512 39136 46046 831487 632086 4096 4 10735 5330 170192 146218 4096 8 19105 20326 528516 418298 4096 16 27500 26728 334344 404224 4096 32 35682 39379 1085286 637618 4096 64 37996 36820 1041721 541869 4096 128 33857 82704 984587 355001 4096 256 28642 56882 1749690 1095249 4096 512 41797 49432 701024 979199 8192 4 8714 10963 306310 373789 8192 8 11684 12281 303993 412695 8192 16 16487 20237 882199 512512 8192 32 27811 26522 572864 509933 8192 64 32045 30480 942917 641353 8192 128 38554 44637 851989 697662 8192 256 39325 65169 1100187 824314 8192 512 30847 60186 547113 822991 16384 4 8055 8376 368437 404373 16384 8 14667 18503 505428 566881 16384 16 18537 26193 874429 787698 16384 32 32662 28186 848820 693801 16384 64 31849 34049 839682 728139 16384 128 38511 49845 1715422 754812 16384 256 39429 46629 1115923 734309 16384 512 44666 67033 1664199 1180913 32768 4 7881 10783 423085 356297 32768 8 13858 15821 614912 434853 32768 16 23432 27921 835024 625368 32768 32 30785 36214 991374 353380 32768 64 34552 44766 965101 891524 32768 128 37704 48122 1637585 741275 32768 256 42679 55465 1442825 1081057 32768 512 46280 67545 1168789 910325 65536 4