Re: [ANNOUNCE] Ramback: faster than a speeding bullet

[david]

On Wed, 12 Mar 2008, Daniel Phillips wrote:

> On Wednesday 12 March 2008 22:45, David Newall wrote:
>
> > Your idea seems predicated on throwing large amounts of RAM at the
> > problem.  What I want to know is this: Is it really 25 times faster than
> > ext3 with an equally huge buffer cache?
>
> Yes.

this I don't understand. what makes your approach 25x faster?

looking at the comparison of a 500G filesystem with 500G of ram allocated 
for a buffer cache.

yes, initially it will be a bit slower (until the files get into the 
buffer cache), and if fsync is disabled all writes will go to the buffer 
cache (until writeout hits)

I may be able to see room for a few percent difference, but not 2x, let 
alone 25x.

David Lang
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