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Posted to user@cassandra.apache.org by Adil <ad...@gmail.com> on 2014/11/20 09:20:59 UTC
logging over multi-datacenter
Hi,
We have two data-center, we configured PasswordAuthenticator on each node,
we increment the RF of system_auth to the number of nodes (each
data-center) as recommended.
We can logged-in via cqlsh without problem, but when i stop cassandra on
all nodes of a data-center we can't logged in in the other
data-center...this error is displayed as output:
Bad credentials]
message="org.apache.cassandra.exceptions.UnavailableException: Cannot
achieve consistency level QUORUM"'
from what i understand we should be able to logged in even if there is only
one node UP but it seems that has to reach QUORUM consistency level (2
data-center).
my question is if the java driver cql uses the same condition and if there
is a way to set the consistency level to like LOCAL_ONE.
Thanks
Adil
Re: logging over multi-datacenter
Posted by Adil <ad...@gmail.com>.
ok thank you.
2014-11-20 16:02 GMT+01:00 Mark Reddy <ma...@gmail.com>:
> Hi Adil,
>
> When using the default superuser ('cassandra') a consistency level of
> QUORUM is used. When using other users ONE is used.
>
> You are not supposed to use 'cassandra' user directly, except to create
> another superuser and use that one from that point on.
>
>
> Mark
>
> On 20 November 2014 14:40, Adil <ad...@gmail.com> wrote:
>
>> cassandra version 2.1.2
>> with the default user
>> we create another user and with this one we could login even if only one
>> node is up
>>
>> 2014-11-20 15:16 GMT+01:00 Mark Reddy <ma...@gmail.com>:
>>
>>> Hi Adil,
>>>
>>> What Cassandra version are you using? Are you using the default user or
>>> a non-default user?
>>>
>>>
>>> Mark
>>>
>>> On 20 November 2014 08:20, Adil <ad...@gmail.com> wrote:
>>>
>>>> Hi,
>>>> We have two data-center, we configured PasswordAuthenticator on each
>>>> node, we increment the RF of system_auth to the number of nodes (each
>>>> data-center) as recommended.
>>>> We can logged-in via cqlsh without problem, but when i stop cassandra
>>>> on all nodes of a data-center we can't logged in in the other
>>>> data-center...this error is displayed as output:
>>>> Bad credentials]
>>>> message="org.apache.cassandra.exceptions.UnavailableException: Cannot
>>>> achieve consistency level QUORUM"'
>>>>
>>>> from what i understand we should be able to logged in even if there is
>>>> only one node UP but it seems that has to reach QUORUM consistency level (2
>>>> data-center).
>>>>
>>>> my question is if the java driver cql uses the same condition and if
>>>> there is a way to set the consistency level to like LOCAL_ONE.
>>>>
>>>> Thanks
>>>> Adil
>>>>
>>>
>>>
>>
>
Re: logging over multi-datacenter
Posted by Mark Reddy <ma...@gmail.com>.
Hi Adil,
When using the default superuser ('cassandra') a consistency level of
QUORUM is used. When using other users ONE is used.
You are not supposed to use 'cassandra' user directly, except to create
another superuser and use that one from that point on.
Mark
On 20 November 2014 14:40, Adil <ad...@gmail.com> wrote:
> cassandra version 2.1.2
> with the default user
> we create another user and with this one we could login even if only one
> node is up
>
> 2014-11-20 15:16 GMT+01:00 Mark Reddy <ma...@gmail.com>:
>
>> Hi Adil,
>>
>> What Cassandra version are you using? Are you using the default user or a
>> non-default user?
>>
>>
>> Mark
>>
>> On 20 November 2014 08:20, Adil <ad...@gmail.com> wrote:
>>
>>> Hi,
>>> We have two data-center, we configured PasswordAuthenticator on each
>>> node, we increment the RF of system_auth to the number of nodes (each
>>> data-center) as recommended.
>>> We can logged-in via cqlsh without problem, but when i stop cassandra on
>>> all nodes of a data-center we can't logged in in the other
>>> data-center...this error is displayed as output:
>>> Bad credentials]
>>> message="org.apache.cassandra.exceptions.UnavailableException: Cannot
>>> achieve consistency level QUORUM"'
>>>
>>> from what i understand we should be able to logged in even if there is
>>> only one node UP but it seems that has to reach QUORUM consistency level (2
>>> data-center).
>>>
>>> my question is if the java driver cql uses the same condition and if
>>> there is a way to set the consistency level to like LOCAL_ONE.
>>>
>>> Thanks
>>> Adil
>>>
>>
>>
>
Re: logging over multi-datacenter
Posted by Adil <ad...@gmail.com>.
cassandra version 2.1.2
with the default user
we create another user and with this one we could login even if only one
node is up
2014-11-20 15:16 GMT+01:00 Mark Reddy <ma...@gmail.com>:
> Hi Adil,
>
> What Cassandra version are you using? Are you using the default user or a
> non-default user?
>
>
> Mark
>
> On 20 November 2014 08:20, Adil <ad...@gmail.com> wrote:
>
>> Hi,
>> We have two data-center, we configured PasswordAuthenticator on each
>> node, we increment the RF of system_auth to the number of nodes (each
>> data-center) as recommended.
>> We can logged-in via cqlsh without problem, but when i stop cassandra on
>> all nodes of a data-center we can't logged in in the other
>> data-center...this error is displayed as output:
>> Bad credentials]
>> message="org.apache.cassandra.exceptions.UnavailableException: Cannot
>> achieve consistency level QUORUM"'
>>
>> from what i understand we should be able to logged in even if there is
>> only one node UP but it seems that has to reach QUORUM consistency level (2
>> data-center).
>>
>> my question is if the java driver cql uses the same condition and if
>> there is a way to set the consistency level to like LOCAL_ONE.
>>
>> Thanks
>> Adil
>>
>
>
Re: logging over multi-datacenter
Posted by Mark Reddy <ma...@gmail.com>.
Hi Adil,
What Cassandra version are you using? Are you using the default user or a
non-default user?
Mark
On 20 November 2014 08:20, Adil <ad...@gmail.com> wrote:
> Hi,
> We have two data-center, we configured PasswordAuthenticator on each node,
> we increment the RF of system_auth to the number of nodes (each
> data-center) as recommended.
> We can logged-in via cqlsh without problem, but when i stop cassandra on
> all nodes of a data-center we can't logged in in the other
> data-center...this error is displayed as output:
> Bad credentials]
> message="org.apache.cassandra.exceptions.UnavailableException: Cannot
> achieve consistency level QUORUM"'
>
> from what i understand we should be able to logged in even if there is
> only one node UP but it seems that has to reach QUORUM consistency level (2
> data-center).
>
> my question is if the java driver cql uses the same condition and if there
> is a way to set the consistency level to like LOCAL_ONE.
>
> Thanks
> Adil
>