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From: mark <mark@aktivix.org>
To: dm-crypt@saout.de
Subject: [dm-crypt] How to optimise encrypted filesystems on an SSD?
Date: Fri, 05 Feb 2010 23:48:15 +0000	[thread overview]
Message-ID: <4B6CAE3F.2060605@aktivix.org> (raw)

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Hi there.

For a while I've been using LUKS/dm-crypt with LVM2 to secure hard
drives in laptops and servers. Recently I've moved one of my filesystems
onto a solid-state drive (Intel X25-M-G2 80GB with latest firmware).

There are some excellent instructions here
http://thunk.org/tytso/blog/2009/02/20/aligning-filesystems-to-an-ssds-erase-block-size/
on how to align ext4 and LVM to the erase block size of the SSD. However
I've not been able to find a recipe for optimising an encrypted
filesystem in the same way.

A typical usage case for me would be this, from following defaults for
encrypted lvm on the Debian installer:

/dev/sda1 79GB crypt-luks
/dev/mapper/sda1_crypt holds PV for LVM2
     PV has a VG with two LVs, 4GB swap and the rest for ext4 /
/dev/sda5 256MB ext2 /boot

Could anyone explain how I might go about aligning/optimising this, or
point me to some instructions? Am I better putting lvm over luks or luks
over lvm? Or something entirely different?

Thanks in advance,
Mark


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             reply	other threads:[~2010-02-05 23:48 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-05 23:48 mark [this message]
2010-02-06  9:26 ` [dm-crypt] How to optimise encrypted filesystems on an SSD? Milan Broz

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