From: David Christensen <dpchrist@holgerdanske.com>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] security concerns with RAID on top of dmcrpyt and with mulitple devices with the same key slot key?
Date: Thu, 2 Jun 2016 19:41:44 -0700 [thread overview]
Message-ID: <5750EE68.2050006@holgerdanske.com> (raw)
In-Reply-To: <1464911269.14592.52.camel@scientia.net>
On 06/02/2016 04:47 PM, Christoph Anton Mitterer wrote:
> ... RAID (e.g. btrfs RAID or MD RAID) on top of dmcrypt devices?
> Any performance or stability issues with such setup?
If you put encryption on top of a RAID of N devices, your CPU will have
to process one layer of encryption. If you put a RAID on top of N
encrypted devices, your CPU will have to process N layers of encryption.
But if you have enough cores and/or AES-NI, the latter might perform
better. Benchmark to find out.
For stability, the kernel, device drivers, dm-crypt, LVM, btrfs, etc.,
need to function correctly under concurrent workloads. Choose your
software accordingly.
David
next prev parent reply other threads:[~2016-06-03 2:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-02 23:47 [dm-crypt] security concerns with RAID on top of dmcrpyt and with mulitple devices with the same key slot key? Christoph Anton Mitterer
2016-06-03 2:41 ` David Christensen [this message]
2016-06-03 3:14 ` Christoph Anton Mitterer
2016-06-03 4:36 ` David Christensen
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