Re: Raid 10 chunksize

On 4/1/09 10:01 AM, "Matthew Wakeling" <matthew@flymine.org> wrote:

> On Wed, 1 Apr 2009, Stef Telford wrote:
>>    Good UPS, a warm PITR standby, offsite backups and regular checks is
>> "good enough" for me, and really, that's what it all comes down to.
>> Mitigating risk and factors into an 'acceptable' amount for each person.
>> However, if you see over a 2x improvement from turning write-cache 'on'
>> and have everything else in place, well, that seems like a 'no-brainer'
>> to me, at least ;)
> 
> In that case, buying a battery-backed-up cache in the RAID controller
> would be even more of a no-brainer.
> 
> Matthew
> 

Why? Honestly, SATA write cache is safer than a battery backed raid card.
The raid card is one more point of failure, and SATA write caches with a
modern file system is safe.


> --
>  If pro is the opposite of con, what is the opposite of progress?
> 
> --
> Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-performance
>