Re: [rfc] Near-constant time directory index for Ext2

[H. Peter Anvin]

Andreas Dilger wrote:
> 
> Basically (IMHO) we will not really get any noticable benefit with 1 level
> index blocks for a 1k filesystem - my estimates at least are that the break
> even point is about 5k files.  We _should_ be OK with 780k files in a single
> directory for a while.
>

I've had a news server with 2000000 files in one directory.  Such a
filesystem is likely to use small blocks, too, because each file is
generally small.

This is an important connection: filesystems which have lots and lots of
small files will have large directories and small block sizes.

        -hpa

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