From: Todd Goodman <tsg@bonedaddy.net>
To: gentoo-embedded@lists.gentoo.org
Subject: Re: [gentoo-embedded] quickpkg and PKG_INSTALL_MASK
Date: Tue, 24 Jan 2012 09:06:29 -0500 [thread overview]
Message-ID: <20120124140629.GR26939@ns1.bonedaddy.net> (raw)
In-Reply-To: <OFEBDA1FC0.30EED2E1-ONC125798F.002A27B5-C125798F.002B3E16@transmode.se>
* Joakim Tjernlund <joakim.tjernlund@transmode.se> [120124 02:18]:
> Ed W <lists@wildgooses.com> wrote on 2012/01/23 19:43:49:
[ .. ]
> > I'm doing something like this using aufs. The performance seems "not
> > bad", but you get a couple MB or so memory hit. (I'm using squashfs as
> > well, so unsure which causes the main memory increase).
>
> hmm, not sure how aufs would work out. One would like to permanently delete the
aufs is A Union FileSystem. You can have a RO "branch" (say SquashFS)
and a r/w "branch" (say JFFS2 or UBIFS.) When you write it will write
to the r/w branch and when you read it will read from the r/w branch if
it exists, else the r/o.
So, if you want to permanently delete the old software. Write it to the
filesystem r/w filesystem (initially or after you have the aufs mounts
mounted.) Then you can delete from the r/w filesystem and it's gone for
good.
> old sw at some point and I don't see how, perhaps I misunderstand something?
>
> How does aufs do w.r.t power cuts? We need a reliable FS w.r.t power cuts. In the
> past we have used JFFS2 on NOR flash and that has worked really well. Now
> we need to switch to NAND due to size requirements.
You still want to pick a r/w branch with a filesystem that handles power
cuts well. You can continue to use JFFS2.
[..]
Todd
next prev parent reply other threads:[~2012-01-24 15:08 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-23 13:23 [gentoo-embedded] quickpkg and PKG_INSTALL_MASK Joakim Tjernlund
2011-12-25 9:34 ` Kfir Lavi
2011-12-25 17:52 ` solar
2011-12-26 18:03 ` Joakim Tjernlund
2011-12-26 20:38 ` solar
2011-12-27 9:40 ` Joakim Tjernlund
2011-12-27 11:44 ` Kfir Lavi
2011-12-29 9:48 ` Joakim Tjernlund
2012-01-23 18:43 ` Ed W
2012-01-24 7:52 ` Joakim Tjernlund
2012-01-24 14:06 ` Todd Goodman [this message]
2012-01-25 13:21 ` Ed W
2012-01-26 11:11 ` Joakim Tjernlund
2012-01-26 13:30 ` Todd Goodman
2012-01-27 18:15 ` Ed W
2012-01-26 14:59 ` Peter Stuge
2012-01-27 18:27 ` Ed W
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