From: Jesse Pollard <pollard@admin.navo.hpc.mil>
To: Larry McVoy <lm@bitmover.com>, Jeff Garzik <jgarzik@pobox.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>,
Samuel Flory <sflory@rackable.com>,
linux-kernel@vger.kernel.org
Subject: Re: ANNOUNCEMENT: Squashfs released (a highly compressed filesystem)
Date: Wed, 30 Oct 2002 08:53:09 -0600 [thread overview]
Message-ID: <200210300853.09342.pollard@admin.navo.hpc.mil> (raw)
In-Reply-To: <20021029201110.A29661@work.bitmover.com>
On Tuesday 29 October 2002 10:11 pm, Larry McVoy wrote:
> > A r/w compressed filesystem would be darned useful too :)
>
> mmap(2) is, err, hard. Not impossible, it means the file system has to
> support both compressed and uncompressed files, but it's interesting.
You can also think of it as a step toward a hierarchical filesystem with the
files:
1. uncompressed (with uncompressed inode)
2. compressed on line (real disk space allocated)
3. compressed nearline (only compressed inode on disk, with a
reference to offline storage)
Obviously this is only for very large filesystems (we have one FS that
is currently between 100-200 TB in size when you include the migrated
storage).
--
-------------------------------------------------------------------------
Jesse I Pollard, II
Email: pollard@navo.hpc.mil
Any opinions expressed are solely my own.
next prev parent reply other threads:[~2002-10-30 14:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-30 2:29 ANNOUNCEMENT: Squashfs released (a highly compressed filesystem) Phillip Lougher
2002-10-30 3:10 ` Samuel Flory
2002-10-30 3:51 ` Phillip Lougher
2002-10-30 4:03 ` Jeff Garzik
2002-10-30 4:11 ` Larry McVoy
2002-10-30 4:15 ` Jeff Garzik
2002-10-30 14:53 ` Jesse Pollard [this message]
2002-10-30 15:10 ` Padraig Brady
2002-10-30 15:42 ` Denis RICHARD
2002-10-31 16:18 ` Nicholas Wourms
2002-10-30 23:56 ` Phillip Lougher
2002-11-01 15:57 ` Rob Landley
2002-11-02 8:57 ` Phillip Lougher
2002-10-30 6:28 ` Ingo Oeser
2002-10-31 4:08 ` Phillip Lougher
-- strict thread matches above, loose matches on Subject: below --
2002-10-30 14:17 Matthew Wilcox
2002-10-31 5:12 Phillip Lougher
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