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From Randall Leeds <>
Subject Re: database design question: concurrent writes
Date Mon, 17 Dec 2012 20:52:36 GMT
On Thu, Dec 13, 2012 at 9:41 AM, Robert Newson <> wrote:

> Two databases can have a different number of shards, different numbers
> of replicas of each shard, different locations for those shards, we
> might move shards over time as we add or remove nodes from the
> cluster. I don't see how you can do any of that without a document
> describing the layout.

tl;dr there's a mapping because the administrator can change it.

Do LSM trees have any concurrency in their use of multiple files, or are
they accessed consecutively during writes?

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