| |
Is it possible to set up a multi-node cluster on a single machine |
|
|
Subject: Is it possible to set up a multi-node cluster on a single machine
Author: EricJ
In response to: How to add a new node into existing cluster?
Posted on: 09/30/2015 01:24:40 AM
It seams to be possible based on the following link
http://stackoverflow.com/questions/22513979/setting-up-cassandra-multi-node-cluster-on-a-single-ubuntu-server
In summary:
Multiple folders for each instance;
Within each folder's yaml file, set 'localhost' as '127,0,0,1', '127,0,0,2', ..., respectively.
Within each folder's cassandra-env.sh file, set 'JMX_PORT' as 7199, 8199, ..., respectively.
>
> On 09/29/2015 02:42:23 AM EricJ wrote:
Setp 1. Download and install Cassandra package unto the new host
Step 2. Configure the new Cassandra node:
Change:
cluster_name: 'Test Cluster'
listen_address: localhost
rpc_address: localhost
- seeds: "127.0.0.1"
to:
cluster_name: 'Clusetr101' <-- The cluster to join
listen_address: 10.11.12.123
rpc_address: 10.11.12.123
â seeds: "10.11.12.13" <-- The cluster's seeds to reference
Step 3. Start the new node:
C:\downloads\apache-cassandra-2.2.1\bin> cassandra -f
Step 4. Check the status:
C:\downloads\apache-cassandra-2.2.1\bin> nodetool status
Starting NodeTool
Datacenter: datacenter1
========================
Status=Up/Down|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns Host ID Rack
UN 10.11.12.13 11.51 MB 256 ? 4571f3b-51807 rack1
UN 10.11.12.123 4.32 MB 256 ? 8f1b1c8-2d0d6 rack1
As it can be seen that the cluster is now having 2 nodes: '10.11.12.13' and '10.11.12.123'.
Note: Check your application data's replication factor before adding any new node, for example,
ReplicationFactor=1 -- trouble if any one node is down
ReplicationFactor=2 -- trouble if any two nodes are down
UnavailableException: Not enough replica available for query at consistency ONE (1 required but only 0 alive)
References:
|
|
|
|
