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 Aug 18 14:05:19 2026 Auto Mode Machine = Linux oleg227-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-oleg227-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 2648 9942 178266 138168 64 8 2133 22947 743988 207157 64 16 3227 12573 942521 789967 64 32 1785 13209 1083249 735831 64 64 1597 66878 1143223 1828508 128 4 4239 9897 482881 603357 128 8 6199 17302 700139 319983 128 16 7161 19502 279502 761728 128 32 8089 43391 1024942 1142750 128 64 9789 58104 358438 1196221 128 128 8047 50194 670413 1749872 256 4 1646 3449 425277 144401 256 8 3048 10764 670332 790209 256 16 6664 19782 475990 61112 256 32 17706 56863 1506359 1224606 256 64 13320 39294 1208072 1137672 256 128 10896 95377 984356 2152625 256 256 17340 87432 1400278 648079 512 4 10644 10626 400291 247811 512 8 4347 16375 141162 78868 512 16 12135 37730 1647088 678980 512 32 26722 32343 1312798 669247 512 64 18361 117568 850217 1105920 512 128 12191 21213 863551 1204552 512 256 32116 99361 1635797 1707325 512 512 31084 156046 1108203 2063289 1024 4 14133 12644 602396 337076 1024 8 14430 22507 402987 1038483 1024 16 14753 10745 203583 1221964 1024 32 13471 12855 579163 390103 1024 64 12407 13232 1050164 781072 1024 128 10421 36920 646461 1107005 1024 256 17570 28588 224704 82065 1024 512 18011 43568 1359680 1045817 2048 4 4184 4501 81739 129940 2048 8 8880 4888 317430 827881 2048 16 11455 9258 477382 368796 2048 32 17203 14104 1033835 431529 2048 64 17510 30064 216219 192014 2048 128 28619 31030 825415 246392 2048 256 15296 42206 726802 1347481 2048 512 16636 37587 1311879 315518 4096 4 3756 3234 133234 149484 4096 8 5445 6799 267204 230408 4096 16 14184 10524 286413 205417 4096 32 9602 33210 430791 771962 4096 64 12378 20430 635942 436538 4096 128 30054 23060 1448823 702199 4096 256 22604 36811 1042480 1166254 4096 512 27704 34247 1464009 675022 8192 4 3149 3944 171992 79725 8192 8 8018 11301 181959 298075 8192 16 13170 11630 281549 177124 8192 32 13987 12413 488725 413152 8192 64 19692 25892 346431 680447 8192 128 28433 34332 677856 785207 8192 256 34466 32764 768059 580618 8192 512 50266 50175 683805 607805 16384 4 4972 9088 313125 227221 16384 8 9396 6461 506931 437570 16384 16 11807 12239 448224 554337 16384 32 15317 17349 591416 616961 16384 64 16346 30780 654628 456987 16384 128 25532 39738 551410 605805 16384 256 26703 37230 709202 511778 16384 512 29407 43724 1165708 564283 32768 4 5869 5074 245845 172059 32768 8