Questions tagged as 'cassandra'

Tagged questions
2
answers

Is there any modeling tool for NoSQL database?

I'm going to do a database design project for a web application that Cassandra will use. I would like to know if there are any tools that can help     
asked by 22.09.2015 / 18:21
3
answers

List keyspaces in Cassandra

I need to learn how to use Apache Cassandra. I'm following a book called Cassandra: The Definitive Guide - Jeffrey Carpenter. I was able to do the installation in a good way, it seems, but when I execute the command: sudo cassandra -f I get...
asked by 17.10.2016 / 18:09
1
answer

Cassandra installation error - DRIVER in python

Hello, I'm trying to create a development environment with python and Cassandra, but I'm having trouble installing the Connector in python, I'm following the environment that I currently have the error that I'm having to return. Operating System:...
asked by 29.12.2017 / 12:11
2
answers

Database to work with nodejs [closed]

I'm developing an entire application with NodeJS. The main reasons for using NodeJS are financial / performance. I have not yet worked with the database using NodeJS, however I have some doubts, since the data load is great. For compari...
asked by 09.05.2014 / 11:51
0
answers

What is the best way or method of studying banks in SQL? [closed]

I need to develop a script that synchronizes a cassandra apache database with another elastic search. However, I do not know the operating mechanism of the two, which are banks in SQL. What is the fastest way to get up to speed and learn about b...
asked by 19.02.2015 / 05:10
2
answers

How to remove brackets from an array in scala

I have an array of dates [2014-11-08 06: 27: 00.0], and I would like to remove the brackets 2014-11-08 06: 27: 00.0. val conf = new SparkConf(true) .set("spark.cassandra.connection.host", "127.0.0.1").setAppName("CasteDate").setMaster("loca...
asked by 10.10.2016 / 11:46
1
answer

Cassandra CQL Shell opens and closes

I started to study about CassandraDB, but I'm using Windows. When I start the 'DataStax DDC Server 3.9.0' service I get an error. Viewing the logs, you get the error: Arquivo: datastax_ddc_server-stderr.xxx.log: 2018-10-19 10:32:28 Commons D...
asked by 19.10.2018 / 17:04
0
answers

Spark Streaming - Add a column with date and time in the stream

I'm consuming the Kafka data and persisting in the BD cassandra. I need to add a column in the stream to measure latency.  Anyone know how to add? Do I need to treat this stream as an RDD?     
asked by 14.06.2018 / 03:13
1
answer

Which PHP frameworks have the best support for working with NoSQL databases?

I would like to know which PHP frameworks have the best support for working with NoSQL databases? The NoSQL banks I already have experience are MongoDB, Redis and Cassandra, but I'm interested in testing other options like LevelDB MemCache an...
asked by 26.10.2016 / 19:07