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Zookeeper >> mail # user >> 'Move' operation for Zookeeper

Robin Bate Boerop 2012-11-15, 19:14
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Re: 'Move' operation for Zookeeper
You can simulate this using multi transactions in the current system. I
think the transactionality of move in the way you are suggesting breaks
down to a multi transaction, so implementing it as a special api call may
be considered redundant.


On Thu, Nov 15, 2012 at 2:14 PM, Robin Bate Boerop <

> Zookeeper users,
> Has anyone investigated the implementation of a 'move' operation in
> Zookeeper?
> For example, suppose that a node '/x/y/z' has 50 Ko of data associated
> with it. A client wants the same data to be found only in node '/a/b/c'.
> The client must:
> 1. Get the contents of '/x/y/z', incurring a transfer of the 50 Ko of data
> from ZK.
> 2. Create node '/a/b/c' with the same 50 Ko of data, incurring another
> transfer of it.
> 3. Delete node '/x/y/z'.
> It would be simpler to issue a 'move' command: move('/x/y/z', '/a/b/c').
> This would also be much faster.
> --
> Robin Bate Boerop
Ted Dunning 2012-11-15, 22:13