linux-ext4 - Re: Couple of queries related to htree directory

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Message-ID: <ffa0f8300706150400u39c31a13l2805f4d8217eb4cf@mail.gmail.com>
Date:	Fri, 15 Jun 2007 16:30:02 +0530
From:	"Tejas Sumant" <tejas.sumant@...il.com>
To:	"Theodore Tso" <tytso@....edu>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: Couple of queries related to htree directory

Hi Theodore,

My file system has dir_index feature.
When I created new directory larger than blocksize and run htree
command of debugfs on it, I received message that the directory is not
in htree format.

Any idea why this happened?

Thanks

On 6/15/07, Theodore Tso <tytso@....edu> wrote:
> On Thu, Jun 14, 2007 at 06:52:01PM +0530, Tejas Sumant wrote:
> >
> > Any idea, how to search a directory on given ext3 file system, which
> > is having htree structure?
>
> The same way you search any other Linux/Unix system.  I.e., using
> opendir()/readir() from a C program, or /bin/ls from a shell program,
> etc.  It's completely transparent.
>
> > Also is there any way to create a htree indexed directory explicitly?
> > using some command or tool?
>
> Once the dir_index feature is enabled, for all new directories and all
> directories which are only take one disk block grow to bigger than one
> disk block, they automatically get indexed.  (There's no point
> indexing a single directory block since that's equivalent to a single
> leaf block.)
>
> To convert existing directories, you need to unmount the filesystem
> and use the command:
>
>        e2fsck -fD /dev/hdXX
>
> This really should be added to an FAQ on ext4.wiki.kernel.org....
>
>                                         - Ted
>


-- 
Tejas Sumant
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