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List:       linux-fsdevel
Subject:    Re: [announce] Squashfs2.0-alpha released (compressed filesystem)
From:       Phillip Lougher <phillip.lougher () gmail ! com>
Date:       2004-05-21 15:53:51
Message-ID: bffbecbb040521085364ab04a8 () mail ! gmail ! com
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On 21 May 2004 09:37:43 -0600, Pat LaVarre <p.lavarre@ieee.org> wrote:
> 
> > http://squashfs.sourceforge.net
> > increased the block size to 64K ...
> 
> An aligned 64 KiB, as DVD/ CD-RW rewards in thruput?
> 

Alignment to 64K block boundaries would impair compression.  All
filesystem objects (data, metadata etc). are packed together on a bye
alignment to maximize compression.

The increase to 64K blocks do increase I/O throughput by the simple
fact there's more data read per seek.  For CD/DVD the fragments also
tend to help by minimizing seeking to read adjacent files.

> Pat LaVarre
> 
>
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