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 21:55:09 2026 Auto Mode Machine = Linux oleg601-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-oleg601-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 1591 2942 592827 467002 64 8 2474 26284 821391 688639 64 16 3209 24663 939223 533875 64 32 4290 18343 1105556 863676 64 64 3890 23995 1143223 413101 128 4 4933 4984 581781 503723 128 8 2795 14322 847059 653282 128 16 5103 27084 1032829 528517 128 32 4901 14797 1175271 463696 128 64 4552 34548 468962 889145 128 128 6561 58849 1306873 1997245 256 4 2777 5468 420283 377041 256 8 5760 4895 332036 186452 256 16 4399 24786 1008392 697322 256 32 10537 35724 92287 934659 256 64 7704 19157 1219045 1213534 256 128 7720 36260 1471270 1453348 256 256 7574 22042 276181 1911233 512 4 4320 8594 51758 220598 512 8 6325 15899 965679 866338 512 16 16613 13583 641651 730236 512 32 17670 34655 1096322 971797 512 64 21134 35444 870552 660600 512 128 10898 33053 1329871 332077 512 256 10272 37184 1463057 642419 512 512 19559 39968 415228 1889050 1024 4 4875 5316 143717 236757 1024 8 11009 14760 825192 399353 1024 16 21578 27191 367537 279860 1024 32 20253 16961 473806 763033 1024 64 26417 52761 996094 450687 1024 128 26208 55713 191758 1170033 1024 256 18778 45769 649394 539514 1024 512 29020 32726 976172 661904 2048 4 4586 4914 212802 154568 2048 8 5796 18121 944280 298502 2048 16 13225 26147 358723 630555 2048 32 16882 31265 670993 667759 2048 64 30098 48738 1351722 1204623 2048 128 37090 58390 879683 300296 2048 256 38638 62470 456212 445032 2048 512 17935 42397 1671907 449409 4096 4 5573 5305 196564 272757 4096 8 10013 11998 377440 336815 4096 16 14190 12540 345651 303409 4096 32 16217 27790 776638 677151 4096 64 29097 29350 470426 325722 4096 128 23464 50285 789668 390542 4096 256 19878 36772 606274 293428 4096 512 32091 28036 277902 883519 8192 4 5353 5917 314678 335269 8192 8 8124 10528 269465 268996 8192 16 13964 11907 274384 561628 8192 32 19036 22566 263162 287671 8192 64 23444 35072 1006619 410320 8192 128 41251 22259 819693 608171 8192 256 32819 34754 497233 633373 8192 512 28810 89250 1836358 431748 16384 4 6816 7230 501467 502931 16384 8 10684 10321 302152 389557 16384 16 11036 17830 591049 648047 16384 32 16287 17907 323602 230668 16384 64 17742 27126 775319 441710 16384 128 26608 42954 1328996 834806 16384 256 21100 41165 296039 390141 16384 512 21615 41865 1014162 737714 32768 4 7159 6642 301024 204813 32768 8 16207 15739 712270 794918 32768 16 23679 17760 469402 613194 32768 32 24974 26485 858206 400244 32768 64 21220 33972 940932 860980 32768 128 21605 33700 826910 549569 32768 256