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
synchronously.
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 different
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 dataloss
On Tue, May 25, 2010 at 11:27 AM, Edward Ned Harvey
solar...@nedharvey.comwrote:
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
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 question
is,
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
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 sorry for
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 Write: up to 250MB/s
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 wonsl...@gmail.com wrote:
On Tue, May 25, 2010 at 12:38 PM, Bob Friesenhahn
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
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 process
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
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 is
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
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
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 and off
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: 50,000
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