Directory limit and file number limit management in Linux

For http://www.aliyun.com/zixun/aggregation/13879.html "> system administrators, it is necessary to understand some of the limitations of the system, so that the necessary parameters can be configured and adjusted to achieve better performance, For system designers and even programmers, understanding some of the limitations of the system can also help design a more reasonable storage structure.

Limit of a directory number

RedHat Enterprise Linux as 4.0 Update 3

Under the same path, the number of subdirectories is limited to 31998, and if your application generates more directories than that, be careful to classify the categories. For example, if the directory name is a number, the number can be divided by 10000 integer value as the parent directory name (/data/1/13892), if the directory name is a letter, you can use the first few characters as a parent directory (/DATA/AB/ABCDEFG) and so on.

The following command line allows you to get the total number of subdirectories in a directory:

$ ls-f grep "/" WC

Workaround:

1 Create a subdirectory

2 Linux for the search efficiency of the CPU, the need to change the number of the kernel will probably recompile.