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Riak 0.8 Release Notes
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Riak 0.8 is the first release of Riak with full support for map/reduce
processing exposed entirely via an HTTP/JavaScript interface.  In summary:

- exposed javascript as a first class map/reduce query language
- map/reduce queries can be submitted via HTTP/JSON (default endpoint
   is "/mapred")
- numerous fixes and tweaks to map/reduce query performance and
   timeout behavior

Riak 0.8 also includes a number of minor improvements such as:

- improved handoff/rebalancing performance.
- added configuration parameter 'handoff_concurrency', which controls
    how many vnodes per host can engage in handoff at once.
- added client_lib/riak.py, a python client for the 'raw' riak http
    interface (based on jiak.py by Jay Baird).
- statistics about node performance, VM state, and Riak cluster status
   are now exposed over HTTP/JSON (default endpoint is "/stats")
- general stability improvements such as improved supervision for vnodes
   and map/reduce processes