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From Alain RODRIGUEZ <arodr...@gmail.com>
Subject Re: Consistency level ONE and using withLocalDC
Date Wed, 08 Jun 2016 17:10:22 GMT
Hi George,

Would that be correct?


I think it is actually quite the opposite :-).

It is very well explained here:
https://docs.datastax.com/en/drivers/java/2.0/com/datastax/driver/core/policies/DCAwareRoundRobinPolicy.Builder.html#withUsedHostsPerRemoteDc-int-

Connection is opened to the X nodes in the remote DC. But it will only be
used to indeed do a local operation as a fallback if the operation is not
using a LOCAL_* consistency level.

Sorry I have been so long answering you.

-----------------------
Alain Rodriguez - alain@thelastpickle.com
France

The Last Pickle - Apache Cassandra Consulting
http://www.thelastpickle.com

2016-05-20 17:54 GMT+02:00 George Sigletos <sigletos@textkernel.nl>:

> Hello,
>
> Using withLocalDC="myLocalDC" and withUsedHostsPerRemoteDc>0 will
> guarantee that you will connect to one of the nodes in "myLocalDC",
>
> but DOES NOT guarantee that your read/write request will be acknowledged
> by a "myLocalDC" node. It may well be acknowledged by a remote DC node as
> well, even if "myLocalDC" is up and running.
>
> Would that be correct? Thank you
>
> Kind regards,
> George
>

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