用titan连接到Cassandra [英] Connecting to cassandra with titan

问题描述

我是泰坦新手。我想在cassandra数据库中使用titan。但是，当我启动gremlin服务器并尝试使用命令加载图形-

I am new to titan. I want to use titan with cassandra database. But when I start the gremlin server and try to load a graph using command -

graph = TitanFactory.open("conf/titan-cassandra.properties")

它给了我以下错误-

Could not instantiate implementation: com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex

我不想使用弹性搜索。任何人都可以帮忙。

I dont want to use elastic search. Can anyone help.

推荐答案

您可能正在尝试连接到先前配置为使用Elasticsearch的现有图形。默认情况下，键空间的名称为 titan 。

You are probably trying to connect to an existing graph that was previously configured to use Elasticsearch. By default, the keyspace is named titan.

1）您可以通过更新<$连接到其他键空间c $ c> conf / titan-cassandra.properties

1) You could connect to a different keyspace by updating conf/titan-cassandra.properties

gremlin.graph=com.thinkaurelius.titan.core.TitanFactory
storage.backend=cassandrathrift
storage.hostname=127.0.0.1
storage.cassandra.keyspace=mygraph

2）您可以删除现有的键空间。如果您从快速入门指南中使用 bin / titan.sh start （启动单个节点Cassandra和单个节点Elasticsearch），

2) You could drop the existing keyspace. If you used bin/titan.sh start from the quick start directions (which starts a single node Cassandra and a single node Elasticsearch),

cd $TITAN_HOME
bin/titan.sh stop
rm -rf db/* logs/*
bin/titan.sh start 

或者如果您有独立的Cassandra安装：

Or if you have a standalone Cassandra installation:

cd $CASSANDRA_HOME
bin/cqlsh -e 'drop keyspace if exists titan'

然后，您将能够使用默认的 conf / titan-cassandra.properties 。

Then you would be able to connect with the default conf/titan-cassandra.properties.

这篇关于用titan连接到Cassandra的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！