Category "cassandra"

How to have an active flag in NoSQL without transaction

This question is only for understanding purpose. This might be a noob question. Assume that I have a tabular or document NoSQL database which do not support tra

How to have a sequence status in NoSQL without transaction

This question is only for understanding purpose. This might be a noob question. Assume that I have a tabular or document NoSQL database which do not support tra

How to have a sequence status in NoSQL without transaction

This question is only for understanding purpose. This might be a noob question. Assume that I have a tabular or document NoSQL database which do not support tra

How is strong consistency possible given two generals problem

Many distributed systems (e.g. databases) say they can provide strong consistency. For example, assuming N replicas of the data, a requirement that W nodes ackn

Cassandra Spring No Converter Found Capable of Converting from Type Instant to type Long

Am getting a No converter found capable of converting from type Instant to type Long while using Spring and Cassandra. I have 2 Instant fields writtenDate (in t

Liquibase with Cassandra tableExists always comes back as false

I am using Liquibase for Cassandra and using the SimbaCassandraJDBC42 driver. I am using the tableExists in a precondition as shown <?xml version="1.0" encod

Missing data in Cassandra database

I have deployed Cassandra server from google cloud marketplace with the below configurations Instance _count:7, machine_type:e2-highmem-4, zone: us-east4-a The

What's the point of SeaweedFS File Store?

According to GitHub, SeaweedFS is intended to be a simple and highly scalable distributed file system which enables you to store and fetch billions of files, f

Timeout on CQL COUNT() restricted by partition key

I have a table in cassandra DB that is populated. It provably has around 10000 records. When I try to execute select count(*), my query times out. Surprisingly,

How to make a selection of row cassandra by basing on variable criteria?

I'm currently working on a social network with Cassandra. I am planning to implement a system of posts and post recommendations in my site. My problem is that I

Is there a working example of the Quarkus Cassandra Client for Pagination?

I am still lost using the Quarkus Cassandra client https://quarkus.io/guides/cassandra I am trying the whole day to get a pagination done with the quarkus integ

When I try fetch data from Amazon Keyspaces with Pyspark, I get Unsupported partitioner: com.amazonaws.cassandra.DefaultPartitioner Error

I'm not experienced in Java or Hadoop ecosystem. I configured my Spark cluster to connect to Amazon Keyspaces by using spark-cassandra-connector from Datastax.

Prometheus Relabeling for Cassandra

I would like to get help with relabeling in prometheus. I am trying to replace instance with nodename, so here in prometheus before relabeling I would like to h

Connect nodejs (local) to cassandra database running on docker container

I have a nodejs API running locally and I would like to connect it to my cassandra cluster running on a docker container. I have the IP of the container but whe

Can't scrape metrics from Cassandra docker container with cassandra exporter

I'm trying to monitor Cassandra that is running in a docker container with this cassandra-exporter . For some reasons the cassandra-exporter can't scrape the me

Cassandra virtualbox error no connection could be made because the target machine actively refused it

I have cassandra install on the virtualbox and connect to c# application with the address, datacenter name correctly but still get the error. Is there anything

"No appropriate python interpreter found. command terminated with exit code 1"

I am trying to perform replication in Cassandra. The cassandra nodes are setup in kubernetes. I am running it locally. I am just a beginner. I am unable to run

HDFS Date partition directory loop

I have a HDFS Directory as below. /user/staging/app_name/2022_05_06 Under such a directory I have around 1000 part files. I want to loop each of the part file

Error to write dataframe in Cassandra table on Amazon Keyspaces

I'm trying to write a dataframe on AWS (Keyspace), but I'm getting the following messages below: Stack: dfExploded.write.cassandraFormat(table = "table", keyspa

Cannot connect to cassandra from within the same k3s cluster

I have deployed cassandra in my local k3s cluster with the below command: helm install monitoring-cassandra bitnami/cassandra --set dbUser.password="cassandra"

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