Some cassandra notes.

1. Start the cassandra:

a). in conf/storage-conf.xml , make sure that the paths exist for CommitLogDirectory and DataFileDirectories. 

b). in conf/log4j.properties and make sure that directories exist for the configured log file(s) as well.

c). change the ListenAddress to you host ip and ThriftAddress to 0.0.0.0, in conf/storage-conf.xml.

d). change the seed to one or more host IPs.

e). "bin/cassandra " to start

 

2. To solve the problem:

"Error occurred during initialization of VM

Could not reserve enough space for object heap"

 

Change the JAVA_OPTS in bin/cassandra.in.sh to use the "-Xms128M \        -Xmx256M \".

 

3. To manage the cassandra:

use the bin/cassandra-cli command line.