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From Jonathan Ellis <>
Subject Re: Cassandra on top of B-Tree
Date Mon, 29 Mar 2010 12:12:56 GMT
On Mon, Mar 29, 2010 at 6:52 AM, Michael Poole <> wrote:
> SSTables aren't written on every update.  Why would a B-Tree
> implementation differ?

Because traditional B-trees are update-in-place, and although CouchDB
has an append-only B-tree, it's limited to one writer at a time which
is (one reason) why they get 6x less throughput than we do on writes.

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