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: Fri Sep 4 04:24:46 2026 Auto Mode Machine = Linux oleg336-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-oleg336-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 3371 9677 598110 420873 64 8 2847 7563 780776 688639 64 16 5143 45040 998622 760859 64 32 8117 61066 1232453 987600 64 64 5994 13730 647135 1638743 128 4 6638 10934 718889 531131 128 8 5199 26277 780556 723735 128 16 7911 40855 1059322 962469 128 32 11134 73304 1332828 921183 128 64 11296 26936 976473 739689 128 128 14763 33889 826202 1967960 256 4 3215 8012 519266 489442 256 8 13463 19981 780445 425277 256 16 5720 35754 589706 573946 256 32 21555 54188 1090308 625794 256 64 15201 44062 973645 1075025 256 128 21415 62210 741633 552960 256 256 24721 65963 212252 314898 512 4 3279 4740 399992 206950 512 8 4688 16367 60164 493696 512 16 18888 15777 994294 484343 512 32 18429 27258 656360 1066910 512 64 26363 52583 628138 1075459 512 128 29165 73519 1434711 939486 512 256 13253 84657 1205228 851903 512 512 35191 115993 687237 2124526 1024 4 11657 8870 393391 113023 1024 8 5018 9879 172013 359297 1024 16 15141 21909 716089 798795 1024 32 32951 29805 420712 1023145 1024 64 14404 25487 893703 539785 1024 128 46377 74386 1400926 1229309 1024 256 45177 71359 950044 702847 1024 512 41604 90829 1276817 1064479 2048 4 6621 5198 250334 243259 2048 8 6626 7660 461036 335573 2048 16 14308 11231 433335 555019 2048 32 19151 32866 386328 1018874 2048 64 23460 31472 222873 514990 2048 128 19711 45157 1165557 614277 2048 256 27260 54693 1057248 752921 2048 512 26715 71264 1592260 584118 4096 4 4530 6620 343997 288350 4096 8 8719 7059 348838 481258 4096 16 13367 16720 386813 200491 4096 32 20688 28846 458878 344867 4096 64 25283 35774 538742 495757 4096 128 24467 42911 219635 331498 4096 256 21233 31861 1483477 666873 4096 512 40280 60804 829352 601561 8192 4 4474 5540 245924 267449 8192 8 8276 9962 216296 313210 8192 16 17518 27485 683234 489107 8192 32 21904 28603 872145 678767 8192 64 28899 37910 626970 755012 8192 128 39303 42565 1206629 766397 8192 256 23917 54914 363946 449989 8192 512 30600 55702 525492 563525 16384 4 5516 5615 227640 255844 16384 8 11271 9888 565179 291462 16384 16 14194 16050 614830 478182 16384 32 23166 29702 549998 552448 16384 64 19966 32758 405755 435305 16384 128 28721 35453 374413 306489 16384 256 41053 45467 577494 397825 16384 512 27027 45450 839775 506270 32768 4 5790 6309 330060 280507 32768 8 7590 9432 268812 217211 32768 16