linux-ext4 - Re: Maximum number of directories

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Message-ID: <3667261.Q2Z9h3nZ4l@deuteros>
Date:	Mon, 04 Feb 2013 13:36:29 +0000
From:	Tvrtko Ursulin <tvrtko.ursulin@...lan.co.uk>
To:	Prashant Shah <pshah.mumbai@...il.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: Maximum number of directories

On Monday 04 February 2013 18:49:54 Prashant Shah wrote:
> Hi,
> 
> On Mon, Feb 4, 2013 at 4:25 PM, Tvrtko Ursulin
> 
> <tvrtko.ursulin@...lan.co.uk> wrote:
> > I was creating such a (crazy?) tree and hit -ENOSPC at ~31 million
> > directories created in total with df showing only 40% use:
> > 
> > Inode count:              29868032
> > Free inodes:              29848131
> 
> Since, each directory will use a inode entry, there is some mismatch
> with ~31 million directories and 19901 inodes in use. The inode usage
> count should be much larger. You have max 29 million inodes available
> - so max can be 29 million directories.

Yeah, I totally forgot about the inode situation on ext filesystems. So is 
tune2fs giving wrong stats for live (mounted) filesystems?

> Try $blk

What is that?

Thanks,

Tvrtko

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