System administration

#System administration (draft)#

##Backing up Cassandra##

Backing up Cassandra is essentially making a snapshot of occurrence store.

Cassandra comes with some command-line tools that we will use for this task:

• cassandra-cli
• nodetool

###Synopsis on Cassandra occurrence store### Where indexed occurrence data is stored:

$ cd /data/cassandra/data/occ

Connect to Cassandra and have a glimpse of stored records:

$ cassandra-cli
	[default@unknown] use occ;
	[default@occ] list occ limit 1;

It's also possible if you want to print a particular record:

[default@occ] get occ where uuid = 'e47e0e31-ff9c-4f31-b598-34f452cb023f';

(to provide directory description)

###Making a snapshot###

$ nodetool snapshot occ
$ cd cassandra/data/
$ ls -la
$ cd occ
$ ls -al

loc for sampling. environment

$ cd snapshots # backups are here

##Solr index##

$ 

###Pointing to a remote Cassandra instance### cassandraHost