[okfn-discuss] [okfn-coord] question from the Twitter gallery about Open Data Grid

Mon Oct 4 01:52:29 UTC 2010

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On 3 Oct 2010, at 14:22, Benjamin O'Steen wrote:

> It is worth pointing out that until I can get a functioning python
> client to a riak instance (eg known version of a client that works  
> with
> a known version of the server) then the riak functionality is totally
> broken :)
>
> Anyone know (or can point to) a set of replicable install steps to
> achieve this?

I used the latest riak 0.12 binary (osx-i386).

I didn't have any success with the PyPi version of protobuf, despite  
it being spec'd in riak-python-client's setup.py, it kept failing to  
import google.protobuf.

Compile and install the full protobuf-2.3.0 library [1] (a vanilla "./ 
configure" worked fine for me) and then install the protobuf Python  
library from the code in the "python" subdirectory with a standard  
"python setup.py install".

Set RIAK_TEST_HOST so that it matches that of the IP address setting  
of one of the nodes in the cluster (for the Hudson build below, I'm  
using a node hosted on a  rackspace cloud server).

Hudson checkout, build and nosetests of riak-python-client:

http://bel-epa.com/hudson/job/riak-python-client/lastBuild/console

Caveat: 43 tests, 2x2 failures, one pair for each transport type. They  
may be critical failures as they involve map-reduce and sibling-count  
tests. But it's a start.

I'm as yet unfamiliar with the workings of riak but basic stuff works:

> >>> from riak import *
> >>> client = RiakClient(host='192.168.0.2')
> >>> bucket = client.bucket("foo")
> >>> obj = bucket.new("some_key", {"key":"value"})
> >>> obj.store()
> <riak.riak_object.RiakObject object at 0x7c9330>
> >>> objval = bucket.get("some_key")
> >>> objval.get_data()
> {u'key': u'value'}

[1] http://protobuf.googlecode.com/files/protobuf-2.3.0.tar.bz2

- --
Cheers,

Graham

http://www.linkedin.com/in/ghiggins

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