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From: Stan Hoeppner <stan@hardwarefreak.com>
To: NeilBrown <neilb@suse.de>
Cc: David Brown <david.brown@hesbynett.no>,
	CoolCold <coolthecold@gmail.com>,
	Daniel Pocock <daniel@pocock.com.au>,
	Roberto Spadim <roberto@spadim.com.br>,
	Phil Turmel <philip@turmel.org>,
	Marcus Sorensen <shadowsor@gmail.com>,
	linux-raid@vger.kernel.org
Subject: Re: md RAID with enterprise-class SATA or SAS drives
Date: Thu, 24 May 2012 01:16:52 -0500	[thread overview]
Message-ID: <4FBDD254.8070505@hardwarefreak.com> (raw)
In-Reply-To: <20120524120819.08ffa3b0@notabene.brown>

On 5/23/2012 9:08 PM, NeilBrown wrote:
> On Wed, 23 May 2012 20:18:06 -0500 Stan Hoeppner <stan@hardwarefreak.com>
> wrote:
> 
>> On 5/23/2012 6:46 PM, Stan Hoeppner wrote:
>>> On 5/23/2012 2:49 PM, David Brown wrote:
>>>
>>>> It looks like Shaohua Li has done some testing, found that there is a
>>>> slow-down even with just 2 or 4 disks, and has written patches to fix it
>>>> (for raid1 and raid10 so far), which is very nice.
>>>
>>> Ahh, thanks David.  I wasn't aware of Shaohua Li's
>>> work on this.  Got a link to his documentation and patches, or article,
>>> by chance?
>>
>> My Google searches only turn up Shaohua Li's TRIM patches.  I don't
>> believe the issue we're discussing has anything to do with TRIM, though
>> I can't be 100% sure as Mark didn't provide much detail of his thread
>> ceiling problem, and I don't have a suitable system to do proper testing.
>>
>> Again it would be nice to have a link to Shaohua Li's work to which you
>> refer to determine if it's applicable to this issue.
>>
> 
> It's probably in your INBOX.
> 
> http://www.spinics.net/lists/raid/msg38899.html
> 
> NeilBrown

Indeed they are.  Well, in a sort folder actually.  I still shouldn't
have missed them.  Please feel free to plant virtual palms to my
forehead if you like. :)

-- 
Stan


  reply	other threads:[~2012-05-24  6:16 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-09 22:00 md RAID with enterprise-class SATA or SAS drives Daniel Pocock
2012-05-09 22:33 ` Marcus Sorensen
2012-05-10 13:34   ` Daniel Pocock
2012-05-10 13:51   ` Phil Turmel
2012-05-10 14:59     ` Daniel Pocock
2012-05-10 15:15       ` Phil Turmel
2012-05-10 15:26     ` Marcus Sorensen
2012-05-10 16:04       ` Phil Turmel
2012-05-10 17:53         ` Keith Keller
2012-05-10 18:10           ` Mathias Burén
2012-05-10 18:23           ` Phil Turmel
2012-05-10 19:15             ` Keith Keller
2012-05-10 18:42         ` Daniel Pocock
2012-05-10 19:09           ` Phil Turmel
2012-05-10 20:30             ` Daniel Pocock
2012-05-11  6:50             ` Michael Tokarev
2012-05-21 14:19           ` Brian Candler
2012-05-21 14:29             ` Phil Turmel
2012-05-26 21:58               ` Stefan *St0fF* Huebner
2012-05-10 21:43       ` Stan Hoeppner
2012-05-10 23:00         ` Marcus Sorensen
2012-05-10 21:15     ` Stan Hoeppner
2012-05-10 21:31       ` Daniel Pocock
2012-05-11  1:53         ` Stan Hoeppner
2012-05-11  8:31           ` Daniel Pocock
2012-05-11 13:54             ` Pierre Beck
2012-05-10 21:41       ` Phil Turmel
2012-05-10 22:27       ` David Brown
2012-05-10 22:37         ` Daniel Pocock
     [not found]         ` <CABYL=ToORULrdhBVQk0K8zQqFYkOomY-wgG7PpnJnzP9u7iBnA@mail.gmail.com>
2012-05-11  7:10           ` David Brown
2012-05-11  8:16             ` Daniel Pocock
2012-05-11 22:28               ` Stan Hoeppner
2012-05-21 15:20                 ` CoolCold
2012-05-21 18:51                   ` Stan Hoeppner
2012-05-21 18:54                     ` Roberto Spadim
2012-05-21 19:05                       ` Stan Hoeppner
2012-05-21 19:38                         ` Roberto Spadim
2012-05-21 23:34                     ` NeilBrown
2012-05-22  6:36                       ` Stan Hoeppner
2012-05-22  7:29                         ` David Brown
2012-05-23 13:14                           ` Stan Hoeppner
2012-05-23 13:27                             ` Roberto Spadim
2012-05-23 19:49                             ` David Brown
2012-05-23 23:46                               ` Stan Hoeppner
2012-05-24  1:18                                 ` Stan Hoeppner
2012-05-24  2:08                                   ` NeilBrown
2012-05-24  6:16                                     ` Stan Hoeppner [this message]
2012-05-24  2:10                         ` NeilBrown
2012-05-24  2:55                           ` Roberto Spadim
2012-05-11 22:17             ` Stan Hoeppner
2012-05-10  1:29 Richard Scobie

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