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 Jun 2 21:34:31 2026 Auto Mode Machine = Linux oleg127-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-oleg127-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 3272 11659 598110 333540 64 8 5567 7645 666414 1183548 64 16 3833 44481 1083249 901377 64 32 5366 26273 1049372 771797 64 64 1720 67721 1232453 1780008 128 4 3792 4514 1229084 20598 128 8 9575 22091 1059322 426492 128 16 10597 48595 914904 864797 128 32 8144 72689 1391557 826202 128 64 13949 93779 1007629 1022989 128 128 9229 117533 673778 1579934 256 4 6110 11423 374281 120188 256 8 13959 24055 1495866 735537 256 16 9654 30894 546765 572721 256 32 12543 25487 335041 597916 256 64 20483 59369 1445521 1523457 256 128 18042 80226 1570244 1463250 256 256 36887 76034 1369908 1581810 512 4 7707 6887 469312 175050 512 8 14108 12028 953248 573916 512 16 12922 29810 946526 901241 512 32 20781 68219 1333173 1012101 512 64 29081 85807 1429934 670082 512 128 21659 112854 1580419 1336492 512 256 42759 103230 1809465 1741948 512 512 45220 104217 196533 1848401 1024 4 8093 7875 466549 84480 1024 8 11242 11872 482536 347579 1024 16 24111 21027 906148 749060 1024 32 23645 48382 870694 443291 1024 64 21236 67457 680897 1171629 1024 128 43749 108913 1762539 1427940 1024 256 42179 95283 1380217 1454537 1024 512 29691 77154 1442326 223337 2048 4 5621 14384 404979 137000 2048 8 7396 9969 304307 726003 2048 16 11910 12847 385548 299375 2048 32 21389 36059 1238848 687755 2048 64 44073 81122 853717 712337 2048 128 35333 44968 407071 306358 2048 256 43744 86358 1370703 1397008 2048 512 34801 41015 1926942 1060642 4096 4 5790 6592 158970 203084 4096 8 10078 10589 403190 328576 4096 16 19829 24370 556436 502823 4096 32 20751 21525 607990 364414 4096 64 26971 44049 1495487 491375 4096 128 54595 66756 986056 1097278 4096 256 27297 58605 1788674 765597 4096 512 32234 40124 460798 365421 8192 4 4399 7769 439890 319251 8192 8 11133 10433 461187 385381 8192 16 11114 11503 231628 271087 8192 32 25169 28522 773853 715711 8192 64 28592 41860 807100 708845 8192 128 42385 41354 754747 643009 8192 256 23782 42762 775968 795036 8192 512 41250 52705 917144 526071 16384 4 7426 6064 210517 272264 16384 8 10120 13537 426755 356653 16384 16 15393 22092 443638 776124 16384 32 25042 29964 771376 299092 16384 64 26871 36670 909916 764817 16384 128 39714 60015 924657 836422 16384 256 31086 52145 617770 575300 16384 512 32465 54074 401814 747919 32768 4 6383 5844 225395 256953 32768 8 10025 12376 486858 516730 32768 16 13086 19347 626431 489762 32768 32