>>> "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> wrote:
> On Thu, Nov 6, 2008 at 3:33 PM, Kevin Grittner
> <Kevin(dot)Grittner(at)wicourts(dot)gov> wrote:
>>>>> "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> wrote:
>>> I am pretty sure that with no write barriers that even a BBU
>> hardware
>>> caching raid controller cannot guarantee your data.
>>
>> That seems at odds with this:
>>
>> http://oss.sgi.com/projects/xfs/faq.html#wcache_persistent
>>
>> What evidence to you have that the SGI XFS team is wrong?
>
> Without write barriers in my file system an fsync request will
> be immediately returned true, correct?
Not as I understand it; although it will be pretty fast if it all fits
into the battery backed cache.
-Kevin