big flash disks?
Jörn Engel
joern at logfs.org
Tue Jun 3 14:09:44 EDT 2008
On Mon, 2 June 2008 13:32:18 +0100, Jamie Lokier wrote:
>
> If they can do 4k writes, and you cannot, it sounds like the SSDs you
> have used are very different to the SSDs they have used. Is that
> right?
It isn't. Their SSDs have shitty performance for 4k random writes.
That's the entire point of their product. They reorder the data,
turning random 4k writes into aligned eraseblock-sized writes. After
that reordering the performance goes way up. Iirc at least one SSD they
used must have 1MB erasesize to explain the performance boost.
Jörn
--
Audacity augments courage; hesitation, fear.
-- Publilius Syrus
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