Re: replication_factor: ?

[Daniel Curry]

Thank you for the link,

On 03/07/2014 07:40 AM, Jonathan Lacefield wrote:

Hello,

The rule of thumb depends on your use case, particularly your consistency requirements. Typical configuration is to leverage RF3. Here's documentation on consistency levels: http://www.datastax.com/documentation/cassandra/1.2/cassandra/dml/dml_config_consistency_c.html

If you had a 3 node cluster with an RF 2, then 2 copies of data would exist on each node., i.e. you would have 2 copies of data in your cluster.

  Hope that helps.

Jonathan Lacefield
Solutions Architect, DataStax
(404) 822 3487 <tel:%28404%29%20822%203487>
<http://www.linkedin.com/in/jlacefield>


<http://www.datastax.com/what-we-offer/products-services/training/virtual-training>

On Fri, Mar 7, 2014 at 10:26 AM, Daniel Curry <daniel.cu...@arrayent.com <mailto:daniel.cu...@arrayent.com>> wrote:

      I would like to know on what is the rule of thumb for
    "replication_factor:" number?
    I think the answer is depends on how many nodes one has? IE: three
    nodes will be the
    number 3.  What would happen it I put the number 2 for a three
    node cluster?
       We are using both 3.2.4 and 3.1.3 ( that will be upgraded to
    3.2.4).

    Thank you.

-- Daniel Curry

    Sr. Linux System Administrator, Network Operations

    PGP : AD5A 96DC 7556 A020 B8E7 0E4D 5D5E 9BA5 C83E 8C92

    Arrayent, Inc.
    2317 Broadway Street, Suite 20
    Redwood City, CA 94063
    dan...@arrayent.com <mailto:dan...@arrayent.com>
    650-260-4520 <tel:650-260-4520>

--
Daniel Curry

Sr. Linux System Administrator, Network Operations

PGP : AD5A 96DC 7556 A020 B8E7 0E4D 5D5E 9BA5 C83E 8C92

Arrayent, Inc.
2317 Broadway Street, Suite 20
Redwood City, CA 94063
dan...@arrayent.com
650-260-4520