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 Jul 20 17:58:36 2026 Auto Mode Machine = Linux oleg325-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-oleg325-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 4145 5007 581273 598110 64 8 3437 27016 842003 511494 64 16 2516 28430 1163036 752329 64 32 3698 17596 1232453 1210227 64 64 3946 80810 1279447 1828508 128 4 3692 13665 653282 468962 128 8 4175 23831 703810 174376 128 16 3792 19257 1172704 847059 128 32 3972 18502 985435 1359835 128 64 4071 17390 1471662 1391557 128 128 2802 86302 1561553 1663139 256 4 3704 4050 125308 580461 256 8 5583 20675 844929 717355 256 16 11072 10821 370536 406288 256 32 10977 16051 1292410 1219045 256 64 7378 41843 775933 552960 256 128 8833 45812 1405778 847597 256 256 7310 24573 532133 1354356 512 4 3120 5938 506983 534491 512 8 12628 17046 777002 259238 512 16 9805 11389 1017858 912733 512 32 13692 58609 1326585 625212 512 64 12293 30636 847867 1177473 512 128 22519 50443 788992 1429934 512 256 32699 68920 901241 819085 512 512 16244 97172 795127 1789859 1024 4 8014 6198 153015 160201 1024 8 14006 19832 631723 584842 1024 16 22908 23997 187374 595381 1024 32 14359 38716 1062372 682737 1024 64 24393 67786 376460 691865 1024 128 11111 62530 626288 685023 1024 256 35928 82527 740408 1030263 1024 512 28928 74375 196504 1460472 2048 4 7096 6957 248905 111746 2048 8 7896 9877 467382 699460 2048 16 11864 12956 505414 257123 2048 32 24827 32470 317771 1072829 2048 64 20221 34522 302688 596200 2048 128 19277 37404 1575612 1297023 2048 256 37079 55635 1538641 1003402 2048 512 33037 51275 1798259 1003871 4096 4 6526 7745 312646 328230 4096 8 11776 14628 463771 282480 4096 16 13585 17394 412820 477831 4096 32 17381 33111 524179 1289605 4096 64 33065 24136 618252 513033 4096 128 27868 50769 1026349 229570 4096 256 40529 47629 1647505 531953 4096 512 37605 84283 1717333 880847 8192 4 6727 6738 223002 162333 8192 8 10999 13541 415943 437860 8192 16 18535 15963 550312 663433 8192 32 25058 23788 366481 711723 8192 64 26530 34336 808525 556065 8192 128 29861 42215 971552 682488 8192 256 38781 45377 1584580 805813 8192 512 30581 60438 827969 1115764 16384 4 6242 6428 289373 278227 16384 8 11547 12359 434439 442643 16384 16 19764 24178 747074 659902 16384 32 23940 36508 776975 807971 16384 64 26012 42665 1010108 668244 16384 128 28058 51012 536775 580622 16384 256 37592 52891 775275 585500 16384 512 45170 50636 1030960 1051402 32768 4 5951 7989 255762 189365 32768 8 12245 10851 528601 350974 32768 16 17214 16154 390863 568444 32768 32 19223 29882 777414 646720 32768 64