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: Mon Aug 24 16:12:39 2026 Auto Mode Machine = Linux oleg637-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-oleg637-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 4611 13804 571375 217039 64 8 3340 29039 735831 365812 64 16 3179 15586 889431 245190 64 32 5315 26734 1143223 659861 64 64 5247 67381 474430 1526887 128 4 6742 12111 630273 495814 128 8 5382 12831 566435 463696 128 16 5809 35557 1076312 913347 128 32 8581 74073 1332828 1172704 128 64 8362 54329 1424795 1471662 128 128 3742 50572 1391557 1579934 256 4 5338 10218 484801 106534 256 8 5833 10364 787312 785010 256 16 13174 23616 1148625 984356 256 32 10098 56412 1405778 1180188 256 64 14967 110822 770920 1447470 256 128 20662 72605 1694118 1108314 256 256 19418 82552 1673001 2266207 512 4 7962 4863 259489 562049 512 8 7805 18163 498047 178276 512 16 8072 14996 1089094 622855 512 32 18420 24436 847532 556659 512 64 10529 45225 771143 653961 512 128 10790 95648 1344020 1267097 512 256 19058 23143 1635797 890404 512 512 22164 79304 1624659 2246778 1024 4 7852 5915 202575 534744 1024 8 16403 11079 446007 693317 1024 16 12095 13592 367820 591853 1024 32 20010 32369 311911 332793 1024 64 21093 48238 786507 580494 1024 128 36833 40959 715493 943781 1024 256 18691 64052 1121458 981750 1024 512 49346 48533 1347311 1058967 2048 4 7264 6759 249360 184504 2048 8 10702 13252 341442 477038 2048 16 12019 28219 612612 906607 2048 32 16497 19214 827801 432615 2048 64 25529 41377 388161 463774 2048 128 32449 49443 680401 1211077 2048 256 67081 52645 443859 801837 2048 512 37208 70064 1018391 699460 4096 4 5894 7054 291303 251072 4096 8 11685 11970 178459 270989 4096 16 17382 19501 511613 187537 4096 32 19536 27211 1010829 757129 4096 64 25883 33292 883519 786019 4096 128 35314 58571 930059 787532 4096 256 29355 62454 569363 321102 4096 512 25391 55337 588335 536890 8192 4 6493 6152 435673 338373 8192 8 10154 14586 540189 344172 8192 16 12640 24045 351090 458033 8192 32 22635 30290 704009 614369 8192 64 26315 36002 1023866 437159 8192 128 30632 51354 938590 588504 8192 256 42960 58904 741889 1049863 8192 512 45718 52924 443696 662793 16384 4 6194 7019 347391 282829 16384 8 10192 12299 421972 219571 16384 16 14756 21417 728046 672989 16384 32 24913 38646 812010 662332 16384 64 29777 45234 658706 669090 16384 128 36278 40281 827180 397910 16384 256 32313 47584 1106722 710831 16384 512 38123 50963 869362 540299 32768 4 8041 8187 372334 280429 32768 8 11753 15234 375284 307394 32768 16 15391 24683 448981 510994 32768 32 20778 25294 588304 428637 32768 64 25079 37604 444751 397931 32768 128 31270 36884 707042 423944 32768 256