--On 25 May 2010 11:15 -0700 Brandon High wrote:
On Tue, May 25, 2010 at 2:08 AM, Karl Pielorz
wrote:
I've tried contacting Intel to find out if it's true their "enterprise"
SSD has no cache protection on it, and what the effect of turning the
write
The "E" in X25-E does not mean "enterpri
On Tue, May 25, 2010 at 2:08 AM, Karl Pielorz wrote:
> I've tried contacting Intel to find out if it's true their "enterprise" SSD
> has no cache protection on it, and what the effect of turning the write
The "E" in X25-E does not mean "enterprise". It means "extreme". Like
the "EE" series CPUs t
On Tue, 25 May 2010, Karl Pielorz wrote:
The X25-E's do apparently honour the 'Disable Write Cache' command - without
write cache, there is no cache to flush - all data is written to flash
immediately - presumably before it's ACK'd to the host.
There is always a cache, even if it is just a 4
On Tue, May 25, 2010 at 01:52:47PM +0100, Karl Pielorz wrote:
>
> --On 25 May 2010 15:28 +0300 Pasi Kärkkäinen wrote:
>
>>> I've tried contacting Intel to find out if it's true their "enterprise"
>>> SSD has no cache protection on it, and what the effect of turning the
>>> write cache off would ha
--On 25 May 2010 15:28 +0300 Pasi Kärkkäinen wrote:
I've tried contacting Intel to find out if it's true their "enterprise"
SSD has no cache protection on it, and what the effect of turning the
write cache off would have on both performance and write endurance, but
not heard anything back yet.
On Tue, May 25, 2010 at 10:08:57AM +0100, Karl Pielorz wrote:
>
>
> --On 24 May 2010 23:41 -0400 rwali...@washdcmail.com wrote:
>
>> I haven't seen where anyone has tested this, but the MemoRight SSD (sold
>> by RocketDisk in the US) seems to claim all the right things:
>>
>> http://www.rocketdisk.
--On 24 May 2010 23:41 -0400 rwali...@washdcmail.com wrote:
I haven't seen where anyone has tested this, but the MemoRight SSD (sold
by RocketDisk in the US) seems to claim all the right things:
http://www.rocketdisk.com/vProduct.aspx?ID=1
pdf specs:
http://www.rocketdisk.com/Local/Files/Pr
Subject: Re: [zfs-discuss] [ZIL device brainstorm] intel x25-M G2 has ram cache?
On May 24, 2010, at 4:28 AM, Erik Trimble wrote:
> yes, both the X25-M (both G1 and G2) plus the X25-E have a DRAM buffer on the
> controller, and neither has a supercapacitor (or other battery) to back it
&g
On May 24, 2010, at 4:28 AM, Erik Trimble wrote:
> yes, both the X25-M (both G1 and G2) plus the X25-E have a DRAM buffer on the
> controller, and neither has a supercapacitor (or other battery) to back it
> up, so there is the potential for data loss (but /not/ data corruption) in a
> power-lo
-discuss] [ZIL device brainstorm] intel x25-M G2 has ram cache?
> What you probably want is a motherboard which has a small area of main
> memory protected by battery, and a ramdisk driver which knows how to use it.
> Then you'd get the 1,000,000 IOPS. No idea if anyone makes such a thing
brainstorm] intel x25-M G2 has ram cache?
Erik Trimble wrote:
Frankly, I'm really surprised that there's no solution, given that the *amount*
of NVRAM needed for ZIL (or similar usage) is really quite small. a dozen GB is
more than sufficient, and really, most systems do fine with just a co
What you probably want is a motherboard which has a small area of main
memory protected by battery, and a ramdisk driver which knows how to use it.
Then you'd get the 1,000,000 IOPS. No idea if anyone makes such a thing.
You are correct that ZFS gets an enormous benefit from even tiny amounts i
Erik Trimble wrote:
Frankly, I'm really surprised that there's no solution, given that the
*amount* of NVRAM needed for ZIL (or similar usage) is really quite
small. a dozen GB is more than sufficient, and really, most systems do
fine with just a couple of GB (3-4 or so). Producing a small
From: Erik Trimble [mailto:erik.trim...@oracle.com]
Sent: 星期一, 五月 24, 2010 16:28
To: Fred Liu
Cc: ZFS Discussions
Subject: Re: [zfs-discuss] [ZIL device brainstorm] intel x25-M G2 has ram cache?
On 5/23/2010 11:30 PM, Fred Liu wrote:
Hi,
I have hit the synchronous NFS writing wall just like
On 5/23/2010 11:30 PM, Fred Liu wrote:
Hi,
I have hit the synchronous NFS writing wall just like many people do.
There also have lots of discussion about the solutions here.
I want to post all of my exploring fighting done recently to discuss
and share:
1): using the normal SATA-SSDs(intel
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