write-intent bitmaps

[Russell Coker]

On Tuesday 29 January 2008 20:13, Peter Rabbitson <rabbit+list at rabbit.us> 
wrote:
> Russell Coker wrote:
> > Are there plans for supporting a NVRAM write-back cache with Linux
> > software RAID?
>
> AFAIK even today you can place the bitmap in an external file residing on a
> file system which in turn can reside on the nvram...

True, and you can also put the journal of a filesystem on a NVRAM device.  But 
that doesn't give the stripe aggregating benefits for RAID-5 or the general 
write-back cache benefits for everything else.

-- 
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