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！