Efficient File Copying On Linux

Efficient File Copying On Linux

In response to my last post about dd, a friend of mine noticed that GNU cp always uses a 128 KB b...概要を表示 In response to my last post about dd, a friend of mine noticed that GNU cp always uses a 128 KB buffer size when copying a regular file; this is also the buffer size used by GNU cat. If you use strace to watch what happens when copying a file, you should see a lot of 128 KB read/write sequences: $ strace -s 8 -xx cp /dev/urandom /dev/null ... read(3, "\x61\xca\xf8\xff\x1a\xd6\x83\x8b"..., 131072)

• performance
• linux