From: Pavel Machek <pavel@ucw.cz>
To: Lindsay Roberts <lindsay.roberts.os@gmail.com>
Cc: Matt Mackall <mpm@selenic.com>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
celinux-dev@tree.celinuxforum.org
Subject: Re: [PATCH] fs: Add romfs version 2
Date: Wed, 25 Jul 2007 18:40:06 +0000 [thread overview]
Message-ID: <20070725184005.GD8225@ucw.cz> (raw)
In-Reply-To: <8734b7880707172016v530ce775p108910f7baf9de8e@mail.gmail.com>
Hi!
> >> > block aligned regular file data to bring
> >performance
> >> > parity with ext2/3. This is about 225% of the read
> >> > speed of the existing romfs.
> >
> >Doesn't that make these filesystems much bigger? By, on
> >average, .5k
> >per file? Or, if I'm understanding things correctly,
> >~1k?
>
> Yes, my experience has been that it has been almost
> chillingly close
> to .5k per regular file increase in partition size. I
> know in
> applications in which size is utterly critical this may
> be slightly
> unattractive, but in cases where romfs is chosen for its
> byte
> reproducibility and read-only nature the
> size/performance tradeoff is
> fairly advantageous.
If the fs is read-only.. can we do some tail packing and get _both_
speed and space efficiency?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2007-07-25 18:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-13 6:01 [PATCH] fs: Add romfs version 2 Lindsay Roberts
2007-07-17 8:36 ` Andrew Morton
2007-07-17 19:21 ` Matt Mackall
2007-07-18 3:16 ` Lindsay Roberts
2007-07-18 17:02 ` Tim Bird
2007-07-25 7:28 ` [Celinux-dev] " Greg Ungerer
2007-07-25 18:40 ` Pavel Machek [this message]
2007-08-06 7:43 ` Lindsay Roberts
2007-08-06 17:20 ` Matt Mackall
2007-07-30 18:12 ` Phillip Susi
2007-07-30 18:29 ` Rene Herman
2007-08-06 19:41 ` Sergey Vlasov
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