[systemd-devel] [PATCH] readahead: read /usr files last for rotational media, skip /var

[ccox@endlessnow.com]

You are thinking of a scenario that you believe is the most important... Nothing wrong, just saying your making some general assumptions.

----- Reply message -----
From: "Lennart Poettering" <lennart at poettering.net>
To: "ccox at endlessnow.com" <ccox at endlessnow.com>
Cc: <systemd-devel at lists.freedesktop.org>
Subject: [systemd-devel]  [PATCH] readahead: read /usr files last for rotational media, skip /var
Date: Mon, Oct 10, 2011 7:14 pm


On Fri, 30.09.11 20:56, ccox at endlessnow.com (ccox at endlessnow.com) wrote:

> The idea that separate / from /usr is archaic or wrong is
> incorrect. Just saying... Think about it for a bit... Because if you
> still believe that to be true...then it is /usr that must go away.

The thing one cannot underline enough is that right now you cannot
operate on the static, vendor-shipped, read-only data in a single
command. But you need exactly that for handling OS snapshots, and for
doing proper state-less systems. Why? because taking individual
snapshots of /bin, /sbin, /lib/, /lib64, /usr is not atomic, but taking
one of /usr alone is.

Lennart

-- 
Lennart Poettering - Red Hat, Inc.
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