From: Marc MERLIN <marc@merlins.org>
To: "Hugo Mills" <hugo@carfax.org.uk>,
"Swâmi Petaramesh" <swami@petaramesh.org>,
"Martin Steigerwald" <Martin@lichtvoll.de>,
linux-btrfs@vger.kernel.org
Subject: Re: discard synchronous on most SSDs?
Date: Thu, 13 Mar 2014 19:11:59 -0700 [thread overview]
Message-ID: <20140314021159.GQ18959@merlins.org> (raw)
In-Reply-To: <20140309113350.GH6318@carfax.org.uk>
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On Sun, Mar 09, 2014 at 11:33:50AM +0000, Hugo Mills wrote:
> discard is, except on the very latest hardware, a synchronous command
> (it's a limitation of the SATA standard), and therefore results in
> very very poor performance.
Interesting. How do I know if a given SSD will hang on discard?
Is a Samsung EVO 840 1TB SSD latest hardware enough, or not? :)
Thanks
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
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next prev parent reply other threads:[~2014-03-14 2:12 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-09 7:48 Massive BTRFS performance degradation KC
2014-03-09 8:17 ` Swâmi Petaramesh
2014-03-09 10:01 ` Martin Steigerwald
2014-03-09 10:23 ` Swâmi Petaramesh
2014-03-09 11:33 ` Hugo Mills
2014-03-09 11:54 ` Martin Steigerwald
2014-03-09 12:10 ` Swâmi Petaramesh
2014-03-09 17:14 ` boris
2014-03-14 2:11 ` Marc MERLIN [this message]
2014-03-14 3:39 ` discard synchronous on most SSDs? Chris Murphy
2014-03-14 5:17 ` Marc MERLIN
2014-03-14 7:33 ` Chris Samuel
2014-03-14 19:26 ` Marc MERLIN
2014-03-14 19:57 ` Martin K. Petersen
2014-03-14 20:46 ` Holger Hoffstätte
2014-03-15 4:21 ` Marc MERLIN
2014-03-15 9:38 ` Holger Hoffstätte
2014-03-15 5:25 ` Chris Samuel
2014-03-15 6:48 ` Chris Samuel
2014-03-15 11:26 ` Duncan
2014-03-15 22:48 ` Chris Samuel
2014-03-16 6:06 ` Marc MERLIN
2014-03-16 17:09 ` Chris Murphy
2014-03-16 16:22 ` Martin K. Petersen
2014-03-16 17:50 ` Marc MERLIN
2014-03-15 4:06 ` Chris Samuel
2014-03-16 16:07 ` Martin K. Petersen
2014-03-14 12:07 ` Duncan
2014-03-14 21:44 ` Chris Murphy
2014-03-14 7:27 ` Chris Samuel
2014-03-09 17:36 ` Massive BTRFS performance degradation Austin S Hemmelgarn
2014-03-09 18:55 ` Tobias Holst
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