Gentoo Archives: gentoo-dev

From: Marc Schiffbauer <mschiff@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] Warn users not to do separate /usr partition without proper initramfs in the handbook?
Date: Mon, 01 Aug 2011 12:20:00
Message-Id: 20110801121902.GD5935@lisa.schiffbauer.lan
In Reply to: Re: [gentoo-dev] Warn users not to do separate /usr partition without proper initramfs in the handbook? by Kacper Kowalik
1 * Kacper Kowalik schrieb am 01.08.11 um 13:32 Uhr:
2 >
3 > I'm responding to this particular mail cause it's last in queue and
4 > because it replicates things already mentioned before.
5 >
6 > I am a zeleous follower of having seperate /usr partition, thus seeing
7 > moot arguments that goes "in favour" of "my" case is pretty annoying.
8 >
9 > > * For example if a filesystem fills 100%. Imagine your /usr is 100%
10 > > full by accident.
11 > Thats bs, cause / can fill out even when you have /usr seperate. Even
12 > faster cause usually you've got very small / like <<1Gb. You miss one
13 > thing that accidentally writes to / and you're as much toasted.
14 >
15
16 The point is that /usr/* has much more load and changes than /
17 alone. ANd a full /usr is much more common than a full / if it is
18 seperated.
19
20 > > * IMO its a good idea to seperate mostly static filesystems from
21 > > those with many writes
22 > How mering / and /usr increase that? What prevents you having separate
23 > partition for heavy write areas inside /usr ?
24
25 Nothing prevents me. But just having /usr seperat is much easier to
26 maintain.
27
28 And well, the FHS clearly allows a sepearte /usr. Everything that is
29 required to boot belongs to / until other filesystems get mounted.
30
31 >
32 > > * Some people want a read-only /usr
33 > Yes, that's only reasonable argument here.
34 >
35 > > * /usr/portage can get very huge and is often written to. With
36 > > / and /usr being on the same FS you really want to have
37 > > /usr/portage on a seperate FS then
38 > Even with separate /usr it's good to have separate partition for
39 > /usr/portage. You can have partition with small blocks and large no. of
40 > inodes this way. How does that prevents merging / and /usr ?
41
42 I agree with you here. My point was that with a seperate /usr you
43 can go well without seperate /usr/portage where you cannot without.
44
45
46
47
48 -Marc
49 PS,OT: /usr/portage always seemed special to me.
50 Would'nt /var/lib/portage be a better place for it?
51 --
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