linux-ext4 - Re: [PATCH 2/3] ext4 directory index: read-ahead blocks v2

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Date:	Sun, 17 Jul 2011 09:12:47 -0400
From:	Theodore Tso <tytso@....EDU>
To:	Bernd Schubert <bernd.schubert@...tmail.fm>
Cc:	Bernd Schubert <bernd.schubert@...m.fraunhofer.de>,
	linux-ext4@...r.kernel.org, adilger@...mcloud.com, colyli@...il.com
Subject: Re: [PATCH 2/3] ext4 directory index: read-ahead blocks v2

On Jul 16, 2011, at 9:02 PM, Bernd Schubert wrote:

> I don't understand it either yet why we have so many, but each directory
> has about 20 to 30 index blocks

Hmm.....  can you send me the output of ls -ld on one or two of the directories?  I want to see how big they are.

Also, just as a sanity check can you send me the following:

debugfs -R "htree /path/to/a/typical/directory" /dev/sdXX | gzip -9 > /tmp/htree_dump.gz2

I just want to take a look at the structure of one of these htrees and see if there's anything surprising going on....

-- Ted

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