> On Feb 9, 2015, at 10:02 AM, Edgar Veiga <edgarmve...@gmail.com> wrote:
> 
> Thanks Christopher,
> 
> BTW, A few more questions:
> - If something goes wrong during the process of joining the nodes, is it 
> possible to make a rollback? If true, how? 

There is no way to currently rollback this process; however, nodes can be 
removed, or force-removed, if they are problematic.

> - Should I look again to the leveldb configurations. It has been working 
> pretty smoothly for more than one year, but 6 more nodes suggests that some 
> tuning may be needed..

Yup; if you’re using Riak 1.4, you should retune write_buffer, read_cache, and 
max_open_files. [1]

[1] 
http://docs.basho.com/riak/1.4.12/ops/advanced/backends/leveldb/#Parameter-Planning

- Chris

Christopher Meiklejohn
Senior Software Engineer
Basho Technologies, Inc.
cmeiklej...@basho.com
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