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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Cluster not recovering when a single node dies
Date Fri, 27 May 2011 18:12:05 GMT
It does not. (Most failures are transient, so Cassandra doesn't
inflict the non-negligible performance impact of re-replicating a full
node's worth of data until you tell it "that guys' not coming back
this time.")

On Fri, May 27, 2011 at 10:47 AM, Paul Loy <keteracel@gmail.com> wrote:
> I guess my next question is: the data should be complete somewhere in the
> ring with RF = 2. Does cassandra not redistribute the replication ring
> without a nodetool decommission call?
>
> On Fri, May 27, 2011 at 4:45 PM, Paul Loy <keteracel@gmail.com> wrote:
>>
>> ahh, thanks.
>>
>> On Fri, May 27, 2011 at 4:43 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>>
>>> Quorum of 2 is 2. You need at least RF=3 for quorum to tolerate losing
>>> a node indefinitely.
>>>
>>> On Fri, May 27, 2011 at 10:37 AM, Paul Loy <keteracel@gmail.com> wrote:
>>> > We have a 4 node cluster with a replication factor of 2. When one node
>>> > dies,
>>> > the other nodes throw UnavailableExceptions for quorum reads (as
>>> > expected
>>> > initially). They never get out of that state.
>>> >
>>> > Is there something we can do in nodetool to make the remaining nodes
>>> > function?
>>> >
>>> > Thanks.
>>> >
>>> > --
>>> > ---------------------------------------------
>>> > Paul Loy
>>> > paul@keteracel.com
>>> > http://uk.linkedin.com/in/paulloy
>>> >
>>>
>>>
>>>
>>> --
>>> Jonathan Ellis
>>> Project Chair, Apache Cassandra
>>> co-founder of DataStax, the source for professional Cassandra support
>>> http://www.datastax.com
>>
>>
>>
>> --
>> ---------------------------------------------
>> Paul Loy
>> paul@keteracel.com
>> http://uk.linkedin.com/in/paulloy
>
>
>
> --
> ---------------------------------------------
> Paul Loy
> paul@keteracel.com
> http://uk.linkedin.com/in/paulloy
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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