Re: New Linux Filesystem: NILFS

From: Douglas McNaught <doug(at)mcnaught(dot)org>
To: Chris Browne <cbbrowne(at)acm(dot)org>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: New Linux Filesystem: NILFS
Date: 2006-09-05 22:36:15
Message-ID: 87r6yqndpc.fsf@suzuka.mcnaught.org
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Chris Browne <cbbrowne(at)acm(dot)org> writes:

> NetBSD used to have a LFS; has that gone anywhere? Or been
> essentially dropped?

My reading over the last few years has indicated that LFSs tend to
suffer bad performance degradation as data and metadata for a given
file get scattered all over the disk. This tends to cancel out the
performance gain from being able to cluster writes in a single area.
For a heavily write-intensive workload, it might be a win, but no one
seems to have demonstrated an advantage for "normal", mostly
read-heavy usage.

-Doug

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