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From Robert Coli <>
Subject Re: is primary key( foo, bar) the same as primary key ( foo ) with a ‘set' of bars?
Date Fri, 02 Jan 2015 19:44:01 GMT
On Fri, Jan 2, 2015 at 11:35 AM, Tyler Hobbs <> wrote:

> This is not true (with one minor exception).  All operations on sets and
> maps require no reads.  The same is true for appends and prepends on lists,
> but delete and set operations on lists with (non-zero) indexes require the
> list to be read first.  However, the entire list does not need to be
> re-written to disk.

Thank you guys for the correction; a case where I am glad to be wrong. I
must have been thinking about the delete/set operations and have drawn an
erroneous inference. :)


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