From: Theodore Ts'o <tytso@mit.edu>
To: Andreas Dilger <aedilger@gmail.com>
Cc: Jeff Moyer <jmoyer@redhat.com>,
Ext4 Developers List <linux-ext4@vger.kernel.org>
Subject: Re: An idea for supporting large directories and readdir+stat workloads
Date: Mon, 13 Aug 2012 10:39:41 -0400 [thread overview]
Message-ID: <20120813143941.GC32484@thunk.org> (raw)
In-Reply-To: <20120813143607.GB32484@thunk.org>
On Mon, Aug 13, 2012 at 10:36:07AM -0400, Theodore Ts'o wrote:
> Field Size
>
> ino 4
Silly me, we don't need actually need to store the inode a second
time, since that's already in the struct ext4_dir_entry.
> dev 4
... and we only need to store the device if this is a block or
character device, so we could actually use the i_size field below to
store the dev_t for devices inodes.
So this would shrink the size of the "compact inode" that would be
stored in the directory entry down from 62 bytes to 58 bytes.
- Ted
prev parent reply other threads:[~2012-08-13 14:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-11 21:25 An idea for supporting large directories and readdir+stat workloads Ted Ts'o
2012-08-13 5:11 ` Andreas Dilger
2012-08-13 14:36 ` Theodore Ts'o
2012-08-13 14:39 ` Theodore Ts'o [this message]
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