I have a Sun A5000, 22x 73GB 15K disks in split-bus configuration, two dual 2Gb
HBAs and four fibre cables from server to array, all for just under $200.
The array gives 4Gb of aggregate thoughput in each direction across two 11 disk
buses.
Right now it is the main array, but when we outgrow it
Edward Ned Harvey wrote:
>> From: sensille [mailto:sensi...@gmx.net]
>>
>> The only thing I'd like to point out
>> is that
>> ZFS doesn't do random writes on a slog, but nearly linear writes. This
>> might
>> even be hurting performance more than random writes, because you always
>> hit
>> the wors
On 5/27/2010 10:33 AM, sensille wrote:
(resent because of received bounce)
Edward Ned Harvey wrote:
From: sensille [mailto:sensi...@gmx.net]
So this brings me back to the question I indirectly asked in the
middle of a
much longer previous email -
Is there some way, in software, to detect th
(resent because of received bounce)
Edward Ned Harvey wrote:
From: sensille [mailto:sensi...@gmx.net]
So this brings me back to the question I indirectly asked in the middle of a
much longer previous email -
Is there some way, in software, to detect the current position of the head?
If not,
(resent because of mail problems)
Edward Ned Harvey wrote:
From: sensille [mailto:sensi...@gmx.net]
The only thing I'd like to point out
is that
ZFS doesn't do random writes on a slog, but nearly linear writes. This
might
even be hurting performance more than random writes, because you always
hi
Neil Perrin wrote:
> Yes, I agree this seems very appealing. I have investigated and
> observed similar results. Just allocating larger intent log blocks but
> only writing to say the first half of them has seen the same effect.
> Despite the impressive results, we have not pursued this further mai
Richard Elling wrote:
> On May 26, 2010, at 8:38 AM, Neil Perrin wrote:
>
>> On 05/26/10 07:10, sensille wrote:
>>> My idea goes as follows: don't write linearly. Track the rotation
>>> and write to the position the head will hit next. This might be done
>>> by a re-mapping layer or integrated int
On May 26, 2010, at 8:38 AM, Neil Perrin wrote:
> On 05/26/10 07:10, sensille wrote:
>> Recently, I've been reading through the ZIL/slog discussion and
>> have the impression that a lot of folks here are (like me)
>> interested in getting a viable solution for a cheap, fast and
>> reliable ZIL dev
On 05/26/10 07:10, sensille wrote:
Recently, I've been reading through the ZIL/slog discussion and
have the impression that a lot of folks here are (like me)
interested in getting a viable solution for a cheap, fast and
reliable ZIL device.
I think I can provide such a solution for about $200, bu
Bob Friesenhahn wrote:
> On Wed, 26 May 2010, sensille wrote:
>> The basic idea: the main problem when using a HDD as a ZIL device
>> are the cache flushes in combination with the linear write pattern
>> of the ZIL. This leads to a whole rotation of the platter after
>> each write, because after th
On Wed, 26 May 2010, sensille wrote:
The basic idea: the main problem when using a HDD as a ZIL device
are the cache flushes in combination with the linear write pattern
of the ZIL. This leads to a whole rotation of the platter after
each write, because after the first write returns, the head is
On 26 May, 2010 - sensille sent me these 4,5K bytes:
> Edward Ned Harvey wrote:
> >> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> >> boun...@opensolaris.org] On Behalf Of sensille
> >>
> >> The basic idea: the main problem when using a HDD as a ZIL device
> >> are the cache flu
Edward Ned Harvey wrote:
>> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
>> boun...@opensolaris.org] On Behalf Of sensille
>>
>> The basic idea: the main problem when using a HDD as a ZIL device
>> are the cache flushes in combination with the linear write pattern
>> of the ZIL. T
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of sensille
>
> The basic idea: the main problem when using a HDD as a ZIL device
> are the cache flushes in combination with the linear write pattern
> of the ZIL. This leads to a whole rotation
14 matches
Mail list logo
