Deploy two-node cassandra Cluster

Deploy the two-node cassandra cluster to ensure that jdk is installed in the system, but not to configure the JAVA environment variable cassandra version: apache-cassandra-1.1.5jdk version: jdk1.6.0 _ 381, cassandra Log Path # vimlog4j-s

Deploy the two-node cassandra cluster to ensure that jdk is installed in the system, but not to configure the JAVA environment variable cassandra version: apache-cassandra-1.1.5jdk version: jdk1.6.0 _ 381, cassandra Log Path # vimlog4j-s

Deploy two-node cassandra Cluster

Make sure that jdk and virtual host are installed in the system. do not configure JAVA environment variables.

Cassandra version: apache-cassandra-1.1.5

Jdk version: jdk1.6.0 _ 38

1. cassandra Log Path

# Vim log4j-server.properties.

Log4j. appender. R. File =/trs6/cassandra/logs/system. log

2. cassandra memory usage (HEAP_NEWSIZE) = 1/4 (MAX_HEAP_SIZE)

# Vim cassandra-env.sh.

MAX_HEAP_SIZE = "4G"

HEAP_NEWSIZE = "800 M"

3. cassandra cluster configuration

# Vim cassandra. yaml

Cluster_name: 'pis '// cluster name

Initial_token: 0 // generated by initial_token.py

#! /Usr/bin/env python

Import sys

If (len (sys. argv)> 1 ):

Num = int (sys. argv [1])

Else:

Num = int (raw_input ("How many nodes are in your cluster? "))

For I in range (0, num ):

Print 'node % d: % d' % (I, (I * (2*127)/num ))

Data_file_directories:

-/Trs6/cassandra/data // data storage directory

Commitlog_directory:/trs6/cassandra/commitlog // commit log directory

Saved_caches_directory:/trs6/cassandra/saved_cache // cache storage directory

-Seeds: "192.168.183.71, 192.168.183.72" // IP address of the seed Node

Listen_address: 192.168.183.71 // listener address-> local IP Address

Rpc_address: 192.168.183.71

Endpoint_snitch: SimpleSnitch

4. Start the Cluster

# Bin/cassandra

5. view the cluster status

# Bin/nodetool-h 192.168.183.71 ring

Address DC Rack Status State Load valid tive-Ownership Token

85070591730234615865843651857942052864

192.168.183.71 datacenter1 rack1 Up Normal 23.61 KB 50.00% 0

192.168.183.72 datacenter1 rack1 Up Normal 23.61 KB 50.00% 85070591730234615865843651857942052864

6. Interactive command line (ended with a semicolon)

[Root @ cas1 ~] # Bin/cassandra-cli-h 192.168.183.71

Connected to: "pis" on 192.168.183.71/9160

Welcome to Cassandra CLI version 1.1.5

Type 'help; 'or '? 'For help.

Type 'Quit; 'or 'exit;' to quit.

(1) create a keyspace

[Default @ unknown] create keyspace DEMO;

5210d4ac-24e2-37e1-8d38-13a3cab24f33

Waiting for schema agreement...

... Schemas agree authentication ss the cluster

(2) Use keyspace for authentication

[Default @ unknown] use DEMO;

Authenticated to keyspace: DEMO

(3) create a column family

[Default @ DEMO] create column family Users

... With key_validation_class = 'utf8type'

... And comparator = 'utf8type'

... And default_validation_class = 'utf8type ';

8618bf72-4e3d-3b7c-84f6-031e69e7d161

Waiting for schema agreement...

... Schemas agree authentication ss the cluster

(4) store data to column family

[Default @ DEMO] set Users [1234] [name] = tianxin;

Value inserted.

Elapsed time: 87 msec (s ).

[Default @ DEMO] set Users [1234] [password] = upgirl;

Value inserted.

Elapsed time: 28 msec (s ).

(5) getting data

[Default @ DEMO] get Users [1234];

=> (Column = name, value = tianxin, timestamp = 1362521480914000)

=> (Column = password, value = upgirl, timestamp = 1362521498155000)

Returned 2 results.

Elapsed time: 131 msec (s ).

Problems:

1. When cassandra is started, Error: Exception thrown by the agent: java.net. MalformedURLException: Local host name unknown: java.net. UnknownHostException: cas1: cas1

Cause: the cluster node must configure host name resolution.

2. When The keyspace is created, The error "The schema has not settled in 10 seconds; further migrations are ill-advised until it does" is returned.

Versions are e71db6f5-eb85-3555-b851-1878497cf194: [198.216.27.72], eceb06f2-03a1-3bf8-a421-2528a053d7e6: [198.216.27.71]

Cause: the time between cluster nodes is not synchronized

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