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From Rameez Thonnakkal <ssram...@gmail.com>
Subject Re: Disable vnode
Date Fri, 04 Jul 2014 14:12:03 GMT
i did a nodetool rebuild on one of the nodes.

Datacenter: DC1
================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address       Load       Tokens  Owns   Host
ID                               Rack
*UN  10.123.75.51  10.54 GB   256     16.0%
d2f980c1-cf82-4659-95ce-ffa3e50ed7c1  RAC1*
UN  10.123.75.53  5.18 GB    256     16.5%
bab7739d-c424-42ef-a8f6-2ba82fcdd0b9  RAC1
UN  10.123.75.52  5.51 GB    256     18.3%
70469a76-939b-4b8c-9512-33aedec6fd3e  RAC1
Datacenter: DC2
================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address       Load       Tokens  Owns   Host
ID                               Rack
UN  10.123.75.51  5.3 GB     256     16.1%
106d5001-2d44-4d81-8af8-5cf841a1575e  RAC1
UN  10.123.75.52  5.34 GB    256     16.2%
c4333d90-476a-4b44-bc23-5fca7ba6a2e7  RAC1
UN  10.123.75.53  5.11 GB    256     16.8%
8154288e-a0fb-45f8-b3fb-6c3d645ba8f3  RAC1

In that node the Load has increased from around 5GB to 10GB.
But the tokens remains same (256). My expectation was that it would come
down to 1.

i will continue to rebuild the remaining nodes.  But not sure whether this
is helping.



On Fri, Jul 4, 2014 at 7:28 PM, Rameez Thonnakkal <ssrameez@gmail.com>
wrote:

> Thanks Mark.
> the procedure you shared is useful. I think I have missed the nodetool
> rebuild command.
> I am trying it out in a non-prod environment.
>
> The num_tokens is set to 1 and initial_token is set to different values
> (mine is a 6 node cluster with 3 in each datacenter).
> Tried a rolling restart of the cluster. That didn't help.
> Tried a cold restart of the cluster. That also didn't work.
>
> I will try the nodetool rebuild and see whether any change.
>
> Thanks,
> rameez
>
>
>
> On Fri, Jul 4, 2014 at 7:19 PM, Mark Reddy <mark.reddy@boxever.com> wrote:
>
>> Hi Rameez,
>>
>> I have never done a migration from vnodes to non-vnodes however I would
>> imagine that the procedure would be the same as its counterpart. As always
>> testing in dev should be done first.
>>
>> To move from vnodes to non-vodes I would add a new datacenter to the
>> cluster with vnodes disabled and rebuild from your vnode cluster.
>>
>> You can find some more details about adding a data center to your cluster
>> here:
>> http://datastax.com/documentation/cassandra/2.0/cassandra/operations/ops_add_dc_to_cluster_t.html?scroll=task_ds_hmp_54q_gk__task_ds_hmp_54q_gk_unique_1
>>
>>
>>
>> Mark
>>
>>
>>
>> On Fri, Jul 4, 2014 at 2:43 PM, Rameez Thonnakkal <ssrameez@gmail.com>
>> wrote:
>>
>>> hello Team,
>>>
>>> I am looking for standard operating procedure to disable vnode in a
>>> production cluster.
>>> This is to enable solr which doesn't work with a cassandra cluster
>>> having vnode enabled.
>>>
>>> Any suggestions/
>>>
>>> Thanks,
>>> Rameez
>>>
>>>
>>
>

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