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Date:      Mon, 19 Oct 2015 19:46:51 -0600 (MDT)
From:      Warren Block <wblock@wonkity.com>
To:        John-Mark Gurney <jmg@funkthat.com>
Cc:        Ed Maste <emaste@freebsd.org>, "O. Hartmann" <ohartman@zedat.fu-berlin.de>, "Julian H. Stacey" <jhs@berklix.com>, Yonas Yanfa <yonas@fizk.net>, FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: Depreciate and remove gbde
Message-ID:  <alpine.BSF.2.20.1510191944500.48715@wonkity.com>
In-Reply-To: <20151019223813.GH65715@funkthat.com>
References:  <56237623.5010702@fizk.net> <201510182329.t9INTarc018248@fire.js.berklix.net> <20151019061930.461285f8@freyja.zeit4.iv.bundesimmobilien.de> <20151019205008.GG65715@funkthat.com> <CAPyFy2CLp=n900Yb5QhoVOd7L%2BzsvcdjwxLBxmjEbEBuvv2r6Q@mail.gmail.com> <20151019223813.GH65715@funkthat.com>

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On Mon, 19 Oct 2015, John-Mark Gurney wrote:

> Ed Maste wrote this message on Mon, Oct 19, 2015 at 17:13 -0400:
>> On 19 October 2015 at 16:50, John-Mark Gurney <jmg@funkthat.com> wrote:
>>> O. Hartmann wrote this message on Mon, Oct 19, 2015 at 06:19 +0200:
>>>> For me, I'd like to know what is the benefit/performance of each technique and
>>>> a clear preparation of each ones advantages over the other. That would make the
>>>> decission process much easier and hopefully would not scare people away and
>>>> announce "FreeBSD does not have a, b, c, ..." ...
>>>
>>> So, one thing that the docs talk about is that geli uses the crypto(9)
>>> framework.  This doesn't mean much on it's own, but if you have a machine
>>> with AES-NI instructions or an accelerator card that supports the cipher
>>> mode used, then you can get faster performance of hardware off load,
>>> while gbde uses the software only routines which are slow..
>>
>> John-Mark, thanks for listing these differences. This is the sort of
>> information we should have available for end users to help choose one
>> or the other -- this info ought to make it into the handbook.
>
> I'm working on updating the section now...
>
> Also realized we should include verbage to say that it's best to use
> page size sectors when possible to reduce overhead of the crypto...

I can help with markup and editing.



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