We get this error when we start our Cassandra recently. New main PID x does not belong to service, and PID file is not owned by root. Refusing. After checking, we found that it is a bug for cassandra startup…
Cassandra uses data partitions to distribute data to each node. Partitions are based on the partition keys. Partition function(partition key) = token number. Apache Cassandra Data Partitions Apache Cassandra, a NoSQL database, belongs to the big data family of applications…
Apache Cassandra supports two kinds of backup strategies. A snapshot is a copy of a table’s SSTable files at a given time, created via hard links. The DDL to create the table is stored as well. Snapshots may be created…
Cassandra timeout issue is a complex issue. Today we will review what read timeout mean in Cassandra and how to fix it. what does Read timeout mean in Cassandra cluster? A read request reached the coordinator, which initially believed that…
Apache Cassandra cluster is a distributed system. Monitoring this cluster is not an easy task. There are a few monitoring tools for Cassandra in the market. Most of them are commercial products. Today we are going to use open source…
The default password for Cassandra is Cassandra. So we need to change it immediately after we install it. We can use this command to change it. Change default password for Cassandra user # cqlsh `hostname` -u cassandra Password: Connected to…
