On 10/29/11 10:11 , Scott Marlowe wrote:
In over 10 years of using hardware RAID controllers with battery
backup on many many machines, I have had exactly zero data loss due to
a failed battery backup. Of course proper monitoring is important, to
make sure the batteries aren't old and dead, but
On Sat, Oct 29, 2011 at 11:54 AM, Marcus Engene wrote:
> The problem I have with battery backed raid controllers is the battery part.
> They're simply not reliable and requires testing etc which I as a rather
> insignificant customer at a generic datacenter cannot have done properly. I
> have how
On 10/28/11 5:45 , Kevin Grittner wrote:
Marcus Engene wrote:
Every now and then I have write peaks which causes annoying delay
on my website
Does anyone here have any recommendations here?
For our largest machines we put WAL on a RAID1 drive pair dedicated
to that tas
On 10/28/2011 12:26 PM, Tomas Vondra wrote:
For example the Intel 710 SSD has a sequential write speed of 210MB/s,
while a simple SATA 7.2k drive can write about 50-100 MB/s for less than
1/10 of the 710 price.
Bulk data transfer rates mean almost nothing in the context of a database
(unless you
On Fri, Oct 28, 2011 at 12:28 PM, Marcus Engene wrote:
> Hi list,
>
> Every now and then I have write peaks which causes annoying delay on my
> website. No particular reason it seems, just that laws of probability
> dictates that there will be peaks every now and then.
>
> Anyway, thinking of ways
On 28 Říjen 2011, 20:40, Merlin Moncure wrote:
> sure, but then you have to have a more complicated setup with a
> drive(s) designated for WAL, another for storage, etc. Also, your
> argument falls away if the WAL is shared with another drive. The era
> of the SSD is here. All new systems I plan w
Hi,
On 28 Říjen 2011, 17:28, Marcus Engene wrote:
> Hi list,
>
> Every now and then I have write peaks which causes annoying delay on my
> website. No particular reason it seems, just that laws of probability
> dictates that there will be peaks every now and then.
>
> Anyway, thinking of ways to m
On Fri, Oct 28, 2011 at 1:26 PM, Tomas Vondra wrote:
> On 28 Říjen 2011, 18:11, Merlin Moncure wrote:
>> On Fri, Oct 28, 2011 at 10:28 AM, Marcus Engene wrote:
>>> Hi list,
>>>
>>> Every now and then I have write peaks which causes annoying delay on my
>>> website. No particular reason it seems,
On 28 Říjen 2011, 18:11, Merlin Moncure wrote:
> On Fri, Oct 28, 2011 at 10:28 AM, Marcus Engene wrote:
>> Hi list,
>>
>> Every now and then I have write peaks which causes annoying delay on my
>> website. No particular reason it seems, just that laws of probability
>> dictates that there will be
On Fri, Oct 28, 2011 at 10:28 AM, Marcus Engene wrote:
> Hi list,
>
> Every now and then I have write peaks which causes annoying delay on my
> website. No particular reason it seems, just that laws of probability
> dictates that there will be peaks every now and then.
>
> Anyway, thinking of ways
Marcus Engene wrote:
> Every now and then I have write peaks which causes annoying delay
> on my website
> Does anyone here have any recommendations here?
For our largest machines we put WAL on a RAID1 drive pair dedicated
to that task, on its own controller with battery-backed cache
configu
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