大量文件的快速Linux文件计数 [英] Fast Linux File Count for a large number of files

问题描述

当大量文件(> 100,000)时，我试图找出在特定目录中查找文件数的最佳方法.

I'm trying to figure out the best way to find the number of files in a particular directory when there are a very large number of files ( > 100,000).

当文件太多时，执行ls | wc -l会花费很长的时间.我相信这是因为它正在返回所有文件的名称.我正在尝试占用尽可能少的磁盘IO.

When there are that many files, performing ls | wc -l takes quite a long time to execute. I believe this is because it's returning the names of all the files. I'm trying to take up as little of the disk IO as possible.

我尝试了一些shell和Perl脚本，但无济于事.有什么想法吗?

I have experimented with some shell and Perl scripts to no avail. Any ideas?

推荐答案

默认情况下，ls对名称进行排序，如果名称很多，则可能需要一段时间.在所有名称被读取和排序之前，也不会有输出.使用ls -f选项关闭排序.

By default ls sorts the names, which can take a while if there are a lot of them. Also there will be no output until all of the names are read and sorted. Use the ls -f option to turn off sorting.

ls -f | wc -l

请注意，这还将启用-a，因此将计算.，..和其他以.开头的文件.

Note that this will also enable -a, so ., .., and other files starting with . will be counted.

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