Linux-kernel mailing list archive 1999-20,: Re: ext2 question

# Re: ext2 question

Theodore Y. Ts'o (tytso@MIT.EDU)
Tue, 18 May 1999 21:40:53 -0400 (EDT)

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Date: Wed, 19 May 1999 00:03:39 +0200 (CEST)
From: Andrea Arcangeli <andrea@suse.de>

But the log-wrap is not the only problem, the other performance problem of
a real logfs is that we are not going to always read _data_ (not only
metadata) in the same order we write things to disk... And we are going to
read _far_ more frequently than writes...

... and one traditional way of dealing with this problem is to assume
that you have a *large* amount of memory, so that most of what you need
to read can be buffered, so that the fact that things are often laid out
in a pessimal order for reading doesn't matter.....

I wouldn't call this a particularly realistic assumption, but then
again memory keeps getting cheaper and cheaper. :-)

- Ted

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