cassandra-2.0

问题 I would like to work with Cassandra from javascript web app using REST API. REST should support basic commands working with DB - create table, select/add/update/remove items. Will be perfect to have something similar to odata protocol. P.S. I'm looking for some library or component. Java is a most preferred. 回答1: Staash solution looks perfect for the task - https://github.com/Netflix/staash 回答2: You can use DataStax drivers. I used it via Scala but you can use Java, a Session object is a long

问题 I would like to work with Cassandra from javascript web app using REST API. REST should support basic commands working with DB - create table, select/add/update/remove items. Will be perfect to have something similar to odata protocol. P.S. I'm looking for some library or component. Java is a most preferred. 回答1: Staash solution looks perfect for the task - https://github.com/Netflix/staash 回答2: You can use DataStax drivers. I used it via Scala but you can use Java, a Session object is a long

问题 We have a big Cassandra cluster 18 Servers (on one server near 5T data ) http://docs.datastax.com/en/cassandra/2.0/cassandra/operations/ops_add_node_to_cluster_t.html - We have added a new nodes following this documentation . After we have added new servers, we began the process of cleaning data (nodetool cleanup) In the documentation advise: After all new nodes are running, run nodetool cleanup on each of the previously existing nodes to remove the keys no longer belonging to those nodes.

问题 Heyy hello, I have some kind of error that won't affect on my project's compilation,deployment and running But it shows red mark at my configuration file for Spring-data-Cassandra also shows problem in problems menu. Can any one please tell what's the issue? I have seen same question related to spring-data-JPA and Spring-data-* but they are not helping so I am posting this one. here is error message:- The errors below were detected when validating the file "spring-tool.xsd" via the file

问题 I want a query to perform following operation List employees name either start or end with A but i seen on some sites that cassandra do not support wildcard characters is it true or not i also refered solr_query but cqlsh gives error undefined name solr_query select * from emp where solr_query='name:A* or name:*A'; where name is coloumn please help me out with this 回答1: Full Text Search is only a feature of DataStax Enterprise. So for Apache Cassandra, you have no such facility. Hope it helps

问题 I am trying to connect titan-1.0.0-hadoop1 with apache-cassandra-3.2 . I am using following " titan-cassandra-myfile.properties ": storage.cassandra-config-dir=titan-1.0.0- hadoop1/conf/cassandra/cassandra.yaml storage.backend=cassandra storage.hostname=localhost When I use gremlin to execute following command: g=TitanFactory.open("/path to titan/ titan-1.0.0-hadoop1/conf/titan-cassandra-myfile.properties"); I am getting following error: java.lang.IllegalArgumentException: Could not

问题 I have installed Datastax Community Edition v2.0.3 on a Windows Server 2012 R2 Datacenter machine. After a vanilla install, I can't connect to the database with OpsCenter because the agent failed to start: it says "0 of 1 agents connected" in the top of the page. I can connect to the database itself using CQLSH. This problem does not occur with v2.0.2. My datastax_opscenter_agent-stderr.log file contains the following: 2013-12-05 16:16:54 Commons Daemon procrun stderr initialized Exception in

问题 I am a beginner in Tableau. I have successfully connected Tableau with Cassandra. I am facing an issue now. I am trying to get the distinct count (unique) value from a given column.. The database which I have is like 17 million. (Cassandra DB) I even tried count (Distinct) as shown above. But it is not working as expected. Can anyone help me out with this? Thanks in advance. 来源： https://stackoverflow.com/questions/32889949/finding-the-distinct-count-from-a-cassandra-column-using-tableau

问题 I am writing a simple spark-cassandra program in java with datastax cassandra but getting below exception Exception in thread "main" java.lang.NoClassDefFoundError: com/twitter/chill/KryoBase Caused by: java.lang.ClassNotFoundException: com.twitter.chill.KryoBase pom.xml <dependency> <groupId>com.datastax.dse</groupId> <artifactId>dse-spark-dependencies</artifactId> <version>5.1.1</version> <exclusions> <exclusion> <groupId>com.datastax.dse</groupId> <artifactId>dse-java-driver-core<

问题 I am using Apache Solr 6.2, and need a timestamp for defaults.last_index_time field or need separate field for a Core config. Default value was defaults.last_index_time=2016-09-19 14:55:17 . I need something like defaults.last_index_time=1474297085558 回答1: Use Property Writer to change last_index_time format in solr.Add the element to the DIH configuration file, directly under the dataConfig element <propertyWriter dateFormat="yyyy-MM-dd'T'HH:mm:ss.SSSXXX" type="SimplePropertiesWriter" /> In