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 16:15:51 2026 Auto Mode Machine = Linux oleg125-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-oleg125-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 3797 5669 566551 546928 64 8 4568 14935 855419 743988 64 16 5652 29531 1070292 863676 64 32 7119 46379 1304314 983980 64 64 3139 54231 172537 1363961 128 4 4693 10086 568836 498114 128 8 6649 8269 921183 643108 128 16 4294 13205 1133103 877518 128 32 7543 17443 1074159 684954 128 64 4392 6350 390222 1243315 128 128 3706 16120 1526043 1727352 256 4 3541 7336 538809 72521 256 8 5647 5081 177425 441359 256 16 7986 12943 559005 579209 256 32 9821 36571 891956 808050 256 64 11436 25877 1391207 1190657 256 128 17556 53001 487664 1075025 256 256 6024 61880 1514860 337251 512 4 2507 6746 486207 345710 512 8 4687 9643 749608 185643 512 16 6376 18403 1438555 378424 512 32 12338 12852 998455 97876 512 64 9209 34369 818149 1094088 512 128 12571 64305 1889050 801357 512 256 14678 66675 1630828 470546 512 512 9573 81025 127873 597385 1024 4 2644 3790 145617 127078 1024 8 9029 4813 360685 734081 1024 16 15309 13750 1163378 966071 1024 32 9020 17191 1015645 180318 1024 64 11102 23933 483242 997019 1024 128 19880 38611 709700 197036 1024 256 8791 31011 179677 1426043 1024 512 22829 96731 1548960 1402756 2048 4 5046 4721 185156 136069 2048 8 9232 14073 408775 409184 2048 16 14033 15975 949919 800343 2048 32 21598 23496 560927 545988 2048 64 24051 25159 509220 488097 2048 128 26710 23824 196207 133645 2048 256 14323 28097 1038082 786134 2048 512 21281 31075 1213986 448026 4096 4 3528 5793 355243 239337 4096 8 5997 11788 338067 267954 4096 16 14150 17471 582135 414154 4096 32 17062 26973 638708 518077 4096 64 18436 26503 668742 577866 4096 128 23914 48139 660769 498779 4096 256 28540 44813 337589 672038 4096 512 28757 42949 509322 476387 8192 4 3717 4321 164756 225073 8192 8 5636 8338 421701 231903 8192 16 11184 14917 326334 215783 8192 32 12758 22943 389889 443552 8192 64 18895 28951 791119 584261 8192 128 27831 17407 419846 268236 8192 256 16592 28976 746483 336636 8192 512 17457 28980 713156 499823 16384 4 3574 2794 167590 155750 16384 8 7309 6120 270390 204095 16384 16 9432 10522 243154 219154 16384 32 14227 20164 240463 219127 16384 64 16158 24129 330401 556429 16384 128