cluster clear without stopping node

Daniel Miller dmiller at dimagi.com
Thu Feb 9 09:46:21 EST 2017


Hi Magnus,

Thanks, this is great news! I was worried that clearing a planned node
removal would stop the node from which I was issuing the clear command,
which would be bad. Sounds like I have nothing to worry about in that case.

On running cluster plan multiple times to generate a new plan: this is a
little surprising since I think I’ve done that before but I haven’t
observed it generating a new plan. I’ll try it again.

Thanks for very quick response.
Daniel
​

On Thu, Feb 9, 2017 at 9:27 AM, Magnus Kessler <mkessler at basho.com> wrote:

> On 8 February 2017 at 21:33, Daniel Miller <dmiller at dimagi.com> wrote:
>
>> According to the docs
>> <http://docs.basho.com/riak/kv/2.2.0/using/admin/commands/#clear>
>> “Running [riak-admin cluster clear] will also stop the current node in
>> addition to clearing any staged changes.
>>
>> Is there a way to clear the current cluster plan without stopping the
>> current node?
>>
> Hi Daniel,
>
> That statement from the docs is wrong. [riak-admin cluster clear] does
> not stop the current node in general. It may stop the node if the command
> is run on a joining node, and the join is cancelled, but should be safe to
> run on all other nodes. I have reached out to the documentation team to get
> this fixed.
>
> Even better (shameless feature request) would be to have a way to “replan”
>> the current plan. That is, clear the plan and then redo the currently
>> planned actions with a single command. Often I have a plan that ends up
>> with an uneven ring allocation and I’ve noticed that I can sometimes get a
>> better allocation if I clear and re-plan several times, but this is tedious.
>>
> You can run  [riak-admin cluster plan] more than once before  [riak-admin
> cluster commit], and it may generate a different transition plan every
> time depending on cluster state.
>
>
>> Thanks!
>> Daniel​
>>
> Kind Regards,
>
> Magnus
>
>
> --
> Magnus Kessler
> Client Services Engineer
> Basho Technologies Limited
>
> Registered Office - 8 Lincoln’s Inn Fields London WC2A 3BP Reg 07970431
>
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