Questions tagged [cassandra]
Apache Cassandra is an open source distributed database management system. It is designed to handle very large amounts of data spread out across many commodity servers while providing a highly available service with no single point of failure. It is a NoSQL solution.
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Facing table deletion when doing alter keyspace on cassandara 5.0.2
I've been facing a weird issue where if I alter a keyspace, all the tables are deleted along with the data. Any help in debugging this would be greatly appreciated. Here's what I followed and what i ...
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Cassandra abnormal reboot and data loss on k8s
I have a 2 data center cassandra k8s cluster that I use for qa testing and various db admin trials/prototyping. Each data center has 2 racks with 2 nodes on the first rack and one node at the second ...
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How to back up commitlogs in a Hyper Converged Database (HCD)?
I am working with a Hyper-Converged Database (HCD), which is based on Cassandra, and I need to implement a backup strategy that includes commitlogs along with SSTables.
I understand that Medusa only ...
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nodetool issue after updated cassandra from 4.0.18 to 4.1.10
We are using Flux to deploy k8ssandra CRDs as a Helm chart. I updated Cassandra to 4.1.10 in the K8ssandraCluster manifest. Cluster is up and running, and Authentication is enabled, but nodetool doesn'...
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Unable to log into a fresh single node installation of 5.0.4 on RHEL9
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When building a Cassandra DB 5.0.4 single node database instance on a VM with RHEL9, I am unable to log in once I enable authentication/authorization. With authentication/authorization disabled, ...
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DNS service not found when deploying 2 cassandra in swarm
In shorts cassandra_2 keeps failing to start because it can't resolve cassandra_1 as its CASSANDRA_SEEDS.
this is my docker stack yml
services:
cassandra_1:
image: cassandra:5.0.5-jammy
...
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Improved write performance after restarting Cassandra nodes
I have a 24-node cluster that receives 400k to 600k ops/s at a latency of approximately 15ms-20ms at the 99th percentile.
I haven't found the reason why after restarting the nodes, writes increase to ...
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Can I upgrade Cassandra 3.11.9 directly to Cassandra 4.0.x or 4.1.x in an 8-node cluster with 2TB data per node?
I have a Cassandra cluster with the following setup:
Cassandra version: 3.11.9
Number of nodes: 8
Data size per node: ~2 TB
I am planning to upgrade to a Cassandra 4.x release (preferably the latest ...
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cassandra disk space not freeing up
I have Cassandra on K8s. It's being used as part of a temporal persistence store. I'm seeing that my disk space is ever growing. I'm deleting some completed workflows, but they still occupy disk space....
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SSTable increase a lot after repair
I'm trying repair in one of the node
nodetool repair -full -st start_token -et end_token keyspace table_name
I found the SSTable count of this table continusly increase and it's useless on compact ...
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Cassandra pod fails to start due to corrupted schema table
We’re currently facing an issue with one of our Cassandra pods in a K8ssandra cluster. One of the pods in the StatefulSet is unable to start due to what appears to be schema corruption. Here’s the ...
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What are recycled-commitlogs?
Cassandra/ScyllaDB
I have a node with 51000+ recycled commitlogs and want to know if I can just blitz them.
I am Linux not Scylla/Cassandra but these are filling up a datadisk. Normal commitlogs ...
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Cassandra cluster does not run in docker-compose after migration from version 4.1.9 to version 5.0.4
I had Cassandra cluster for tests that was run from docker-compose.yml.
services:
cassandra1:
image: cassandra:4.1.9
container_name: cassandra1
hostname: cassandra1
networks:
- ...
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Cassandra5 coming with nb sstable prefix format
Cassandra5 coming with nb sstable prefix format. Is it something wrong or its expected.
As per the code its expted format is oa (5.0)
sstables generated in cassandra5 are in format nb, but official ...
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Cassandra for Windows
I have downloaded Cassandra from here https://www.apache.org/dyn/closer.lua/cassandra/5.0.4/apache-cassandra-5.0.4-bin.tar.gz, i have extracted it and set the environment variable as well, but when i ...
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