On May 26, 2010, at 4:12 AM, Attila Mravik wrote:
> If your ZIL does use nonvolatile cache and does not honor flush
> requests then a powerloss is the same as loosing the ZIL altogether
> since it will not have the data saved for a playback.
This is not a correct statement. Those are two differe
>>
>> Since this is a SSD you're talking about, unless you have enabled
>> nonvolatile write cache on that disk (which you should never do), and the
>> disk incorrectly handles cache flush commands (which it should never do),
>> then the supercap is irrelevant. All ZIL writes are to be done
>> syn
> From: Thomas Burgess [mailto:wonsl...@gmail.com]
>
> I might be somewhat confused to how the ZIL
> works but i thought the point of the ZIL was to "pretend" a write
> actually happened when it may not have actually been flushed to disk
> yet...
No. How the ZIL works is like this:
Whenever a p
On Tue, 25 May 2010, Thomas Burgess wrote:
The Apollo reentry vehicle was able to reach amazing speeds, but only for a
single use.
What exactly do you mean?
What I mean is what I said. A set of specifications which are all
written as "maximums" (i.e. peak) is pretty useless. Perhaps if y
Also, let me note, it came with a 3 year warranty so I expect it to last at
least 3 years...but if it doesn't, i'll just return it under the warranty.
On Tue, May 25, 2010 at 1:26 PM, Thomas Burgess wrote:
>
>
> On Tue, May 25, 2010 at 12:38 PM, Bob Friesenhahn <
> bfrie...@simple.dallas.tx.us>
On Tue, May 25, 2010 at 12:38 PM, Bob Friesenhahn <
bfrie...@simple.dallas.tx.us> wrote:
> On Mon, 24 May 2010, Thomas Burgess wrote:
>
>>
>> It's a sandforce sf-1500 model but without a supercapheres some info
>> on it:
>>
>> Maximum Performance
>>
>> * Max Read: up to 270MB/s
>> * Max Wr
>
>
> At least to me, this was not clearly "not asking about losing zil" and was
> not clearly "asking about power loss." Sorry for answering the question
> you
> thought you didn't ask.
>
I was only responding to your response of WRONG!!! The guy wasn't wrong in
regards to my questions. I'm s
On Mon, 24 May 2010, Thomas Burgess wrote:
It's a sandforce sf-1500 model but without a supercapheres some info on it:
Maximum Performance
* Max Read: up to 270MB/s
* Max Write: up to 250MB/s
* Sustained Write: up to 235MB/s
* Random Write 4k: 15,000 IOPS
* Max 4k IOPS: 50,000
> From: Thomas Burgess [mailto:wonsl...@gmail.com]
> > Just dataloss.
> WRONG!
>
> I didn't ask about losing my zil.
>
> I asked about power loss taking out my pool.
As I recall:
> I recently got a new SSD (ocz vertex LE 50gb)
>
> It seems to work really well as a ZIL performance wise. My que
On Tue, May 25, 2010 at 11:27 AM, Edward Ned Harvey
wrote:
> > From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> > boun...@opensolaris.org] On Behalf Of Nicolas Williams
> >
> > > I recently got a new SSD (ocz vertex LE 50gb)
> > >
> > > It seems to work really well as a ZIL perform
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Nicolas Williams
>
> > I recently got a new SSD (ocz vertex LE 50gb)
> >
> > It seems to work really well as a ZIL performance wise.
> > I know it doesn't have a supercap so lets' say datalos
>
>
> Not familiar with that model
>
>
It's a sandforce sf-1500 model but without a supercapheres some info on
it:
Maximum Performance
- Max Read: up to 270MB/s
- Max Write: up to 250MB/s
- Sustained Write: up to 235MB/s
- Random Write 4k: 15,000 IOPS
- Max 4k IOPS: 50,00
>
>
> ZFS is always consistent on-disk, by design. Loss of the ZIL will result
> in loss of the data in the ZIL which hasn't been flushed out to the hard
> drives, but otherwise, the data on the hard drives is consistent and
> uncorrupted.
>
>
>
> This is what i thought. I have read this list on
On 5/24/2010 2:48 PM, Thomas Burgess wrote:
I recently got a new SSD (ocz vertex LE 50gb)
Not familiar with that model
It seems to work really well as a ZIL performance wise. My question
is, how safe is it? I know it doesn't have a supercap so lets' say
dataloss occursis it just
On 5/24/2010 2:48 PM, Thomas Burgess wrote:
I recently got a new SSD (ocz vertex LE 50gb)
It seems to work really well as a ZIL performance wise. My question
is, how safe is it? I know it doesn't have a supercap so lets' say
dataloss occursis it just dataloss or is it pool loss?
ZFS is
On Mon, May 24, 2010 at 05:48:56PM -0400, Thomas Burgess wrote:
> I recently got a new SSD (ocz vertex LE 50gb)
>
> It seems to work really well as a ZIL performance wise. My question is, how
> safe is it? I know it doesn't have a supercap so lets' say dataloss
> occursis it just dataloss or
I recently got a new SSD (ocz vertex LE 50gb)
It seems to work really well as a ZIL performance wise. My question is, how
safe is it? I know it doesn't have a supercap so lets' say dataloss
occursis it just dataloss or is it pool loss?
also, does the fact that i have a UPS matter?
the nu
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