Gentoo Archives: gentoo-amd64

From: Duncan <1i5t5.duncan@×××.net>
To: gentoo-amd64@l.g.o
Subject: [gentoo-amd64] Re: Re: Re: Fragmentation
Date: Sat, 18 Feb 2006 04:35:38
Message-Id: pan.2006.02.18.04.33.50.483910@cox.net
In Reply to: Re: [gentoo-amd64] Re: Re: Fragmentation by Andrei Slavoiu
1 Andrei Slavoiu posted
2 <20060217161218.13280.qmail@×××××××××××××××××××××××.com>, excerpted below,
3 on Fri, 17 Feb 2006 08:12:18 -0800:
4
5 > --- Peter Humphrey <prh@××××××××××.uk> wrote:
6 >> [T]his box gets treated pretty much as a development machine would,
7 >> with partitions moving up and down and being copied between disks far
8 >> more often than lots of people would find comfortable!
9
10 > Did you ever consider LVM? I never worked with it but from what I know
11 > it was designed for exactly this purpose. Have a look here and see if ti
12 > would help you http://www.gentoo.org/doc/en/lvm2.xml
13
14 lvm2 is a pretty neat solution. I use it here for my non-root raid-6
15 partitions. The biggest catch with it is that it requires an
16 initramfs/initrd if system-root is to be lvm. I prefer the simplicity of
17 avoiding an initrd, so I don't use lvm for my root partitions at all.
18
19 I have only /boot on raid-1, since neither lilo nor grub can read other
20 raid forms, so only one partition there to worry about and no need for
21 lvm. I have two partitions on raid-0, /tmp (with /var/tmp a symlink to
22 it) and a shared "stryper" partition containing ccache, the portage tree
23 and distdir, and /usr/src, and it's simpler just to manage that as raid-0
24 partitions directly. However, the raid-6 has quite a few separate volumes
25 on it, with a working and a backup copy of most of them, so other than the
26 root and backup-root partitions (which include /var minus /var/log and
27 /var/tmp and /usr minus the portage tree, /usr/local, and /usr/src, thus,
28 the roots contain everything portage usually merges to, keeping each
29 portage database, the one on working and the one on backup, in sync with
30 what's actually on that partition, a lesson I learned the hard way), I
31 keep the rest of my redundancy needing data in lvm2 volumes in one big
32 raid-6 partition.
33
34 --
35 Duncan - List replies preferred. No HTML msgs.
36 "Every nonfree program has a lord, a master --
37 and if you use the program, he is your master." Richard Stallman in
38 http://www.linuxdevcenter.com/pub/a/linux/2004/12/22/rms_interview.html
39
40
41 --
42 gentoo-amd64@g.o mailing list