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Re: Why is `find -name '*.txt'` much slower than '*.txt' on glusterfs?

From: Kaz Kylheku (Coreutils)
Subject: Re: Why is `find -name '*.txt'` much slower than '*.txt' on glusterfs?
Date: Tue, 23 Jan 2018 13:38:51 -0800
User-agent: Roundcube Webmail/0.9.2

On 2018-01-19 20:26, Peng Yu wrote:

There are ~7000 .txt files in a directory on glusterfs. Here are the
run time of the following two commands. Does anybody know why the find
command is much slower than *.txt. Is there a way to change the api
that `find` uses to search files so that it can be more friendly to

A wild guess: find is calling stat on every directory entry that it reads?

What do you see if you run these commands under "strace"?

On GNU/Linux, programs that search through directories can avoid calling
stat in many cases by taking advantage of the "d_type" field in
"struct dirent". Maybe this doesn't work on glusterfs?

The *.txt syntax (that specific case of it) doesn't have to stat any
inodes because it just cares about the names whether they are directories
or other objects.

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