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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