On Wed, Jul 27, 2011 at 9:22 PM, Daniel Carosone d...@geek.com.au wrote:
Absent TRIM support, there's another way to do this, too. It's pretty
easy to dd /dev/zero to a file now and then. Just make sure zfs
doesn't prevent these being written to the SSD (compress and dedup are
off). I have
On Thu, 28 Jul 2011, Nico Williams wrote:
Seems to me that it'd be nicer to have an interface to raw flash (no
wear leveling, direct access to erasure, read, write,
read-modify-write [as an optimization]). Then the filesystem could do
a much better job of using flash efficiently. But a raw
ZFS never does update-in-place and UFS only does update-in-place for
metadata and where the application forces update-in-place.
ufs always updates in place (it will rewrite earlier allocated locks).
The only time when it does is when the file is growing and it may move
stuff around (when the
On 07/27/11 00:00, Peter Jeremy wrote:
On 2011-Jul-26 17:24:05 +0800, Fajar A. Nugrahaw...@fajar.net wrote:
Shouldn't modern SSD controllers be smart enough already that they know:
- if there's a request to overwrite a sector, then the old data on
that sector is no longer needed
ZFS never
On Mon, 25 Jul 2011, Edward Ned Harvey wrote:
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Erik Trimble
Honestly, I think TRIM isn't really useful for anyone.
I'm going to have to disagree.
As usual. :-)
There are only two times
Processing the request just means flagging the blocks, though, right?
And the actual benefits only acrue if the garbage collection / block
reshuffling background tasks get a chance to run?
I think that's right. TRIM just gives hints to the garbage collector that
sectors are no longer in
Bullshit. I just got a OCZ Vertex 3, and the first fill was 450-500MB/s.
Second and sequent fills are at half that speed. I'm quite confident
that it's due to the flash erase cycle that's needed, and if stuff can
be TRIM:ed (and thus flash erased as well), speed would be regained.
Overwriting an
On Tue, Jul 26, 2011 at 3:28 PM, casper@oracle.com wrote:
Bullshit. I just got a OCZ Vertex 3, and the first fill was 450-500MB/s.
Second and sequent fills are at half that speed. I'm quite confident
that it's due to the flash erase cycle that's needed, and if stuff can
be TRIM:ed (and thus
Shouldn't modern SSD controllers be smart enough already that they know:
- if there's a request to overwrite a sector, then the old data on
that sector is no longer needed
- allocate a clean sector from pool of available sectors (part of
wear-leveling mechanism)
- clear the old sector, and add
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Fajar A. Nugraha
Shouldn't modern SSD controllers be smart enough already that they know:
- if there's a request to overwrite a sector, then the old data on
that sector is no longer needed
On Mon, July 25, 2011 10:03, Orvar Korvar wrote:
There is at least a common perception (misperception?) that devices
cannot process TRIM requests while they are 100% busy processing other
tasks.
Just to confirm; SSD disks can do TRIM while processing other tasks?
Processing the request just
On Tue, Jul 26, 2011 at 7:51 AM, David Dyer-Bennet d...@dd-b.net wrote:
Processing the request just means flagging the blocks, though, right?
And the actual benefits only acrue if the garbage collection / block
reshuffling background tasks get a chance to run?
I think that's right. TRIM just
On 2011-Jul-26 17:24:05 +0800, Fajar A. Nugraha w...@fajar.net wrote:
Shouldn't modern SSD controllers be smart enough already that they know:
- if there's a request to overwrite a sector, then the old data on
that sector is no longer needed
ZFS never does update-in-place and UFS only does
How long have you been using a SSD? Do you see any performance decrease? I
mean, ZFS does not support TRIM, so I wonder about long term effects...
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On 7/25/2011 3:32 AM, Orvar Korvar wrote:
How long have you been using a SSD? Do you see any performance decrease? I
mean, ZFS does not support TRIM, so I wonder about long term effects...
Frankly, for the kind of use that ZFS puts on a SSD, TRIM makes no
impact whatsoever.
TRIM is
On 25 July, 2011 - Erik Trimble sent me these 2,0K bytes:
On 7/25/2011 3:32 AM, Orvar Korvar wrote:
How long have you been using a SSD? Do you see any performance decrease? I
mean, ZFS does not support TRIM, so I wonder about long term effects...
Frankly, for the kind of use that ZFS puts
Erik Trimble erik.trim...@oracle.com wrote:
On 7/25/2011 3:32 AM, Orvar Korvar wrote:
How long have you been using a SSD? Do you see any performance decrease? I
mean, ZFS does not support TRIM, so I wonder about long term effects...
Frankly, for the kind of use that ZFS puts on a SSD,
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Erik Trimble
Honestly, I think TRIM isn't really useful for anyone.
I'm going to have to disagree.
There are only two times when TRIM isn't useful:
1) Your demand of the system is
There is at least a common perception (misperception?) that devices cannot
process TRIM requests while they are 100% busy processing other tasks.
Just to confirm; SSD disks can do TRIM while processing other tasks?
I heard that Illumos is working on TRIM support for ZFS and will release
On 7/25/2011 6:43 AM, Edward Ned Harvey wrote:
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Erik Trimble
Honestly, I think TRIM isn't really useful for anyone.
I'm going to have to disagree.
There are only two times when TRIM isn't
On 7/25/2011 4:28 AM, Tomas Ögren wrote:
On 25 July, 2011 - Erik Trimble sent me these 2,0K bytes:
On 7/25/2011 3:32 AM, Orvar Korvar wrote:
How long have you been using a SSD? Do you see any performance decrease? I
mean, ZFS does not support TRIM, so I wonder about long term effects...
On 7/25/2011 4:49 AM, joerg.schill...@fokus.fraunhofer.de wrote:
Erik Trimbleerik.trim...@oracle.com wrote:
On 7/25/2011 3:32 AM, Orvar Korvar wrote:
How long have you been using a SSD? Do you see any performance decrease? I
mean, ZFS does not support TRIM, so I wonder about long term
On 7/25/2011 8:03 AM, Orvar Korvar wrote:
There is at least a common perception (misperception?) that devices cannot process
TRIM requests while they are 100% busy processing other tasks.
Just to confirm; SSD disks can do TRIM while processing other tasks?
I heard that Illumos is working on
I am using the OCZ Vertex 3, 240GB. When I boot Solaris 11 Express, on the
splash screen, there is a small red line traveling from left to right. With
this SSD, the red line is traveling two times over the screen before S11E has
booted up. With hard disk, the red line traveled several times
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Orvar Korvar
So boot is much quicker.
Everyday use, I dont notice anything. Every application boots quick, and I
dont think about application boot time anymore.
OT but...
At work, we
On Jul 21, 2011, at 4:08 PM, Gordon Ross wrote:
I'm looking to upgrade the disk in a high-end laptop (so called
desktop replacement type). I use it for development work,
runing OpenIndiana (native) with lots of ZFS data sets.
These hybrid drives look kind of interesting, i.e. for about
I'm looking to upgrade the disk in a high-end laptop (so called
desktop replacement type). I use it for development work,
runing OpenIndiana (native) with lots of ZFS data sets.
These hybrid drives look kind of interesting, i.e. for about $100,
one can get:
Seagate Momentus XT ST95005620AS
Ross
Sent: Thursday, July 21, 2011 4:09 PM
To: zfs-discuss@opensolaris.org
Subject: [zfs-discuss] SSD vs hybrid drive - any advice?
I'm looking to upgrade the disk in a high-end laptop (so called
desktop replacement type). I use it for development work,
runing OpenIndiana (native) with lots of ZFS
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Gordon Ross
Anyone have experience with either one? (good or bad)
Opinions whether the lower capacity and higher cost of
the SSD is justified in terms of performance for things
like
On Thu, Jul 21, 2011 at 4:08 PM, Gordon Ross gordon.w.r...@gmail.com wrote:
And then for about $400 one can get an 250GB SSD, such as:
Crucial M4 CT256M4SSD2 2.5 256GB SATA III MLC Internal Solid State
Drive (SSD)
http://www.newegg.com/Product/Product.aspx?Item=N82E16820148443
Anyone have
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