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Questions tagged [cassandra]

Apache Cassandra is an open source distributed key-value database cluster, designed to scale linearly when adding nodes. It provides multi-datacenter replication.

It was 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 that was initially developed by Facebook and powered their Inbox Search feature until late 2010.

Official page

Source: wikipedia

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Access Cassandra on Google Cloud - Kubernetes from local DataStax Studio

I've setup Cassandra cluster on Kubernetes on GCP. I can very well execute the cqlsh from my local machine, using the CLI. However, I've DataStax Studio installed in my machine and I wish to access the Cassandra database on GCP. I've tried port…
Diptiman
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Cassandra long queries (33s for dropping empty table)

Currently trying a setup for a large project. The project will utilize tens of thousands of tables to chunk the big data into separate pieces that are faster to search. So to test this I'm creating these tables but notice that these are created very…
Niels
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Connection refused with internal private DNS name

I have a Cassandra cluster set up on 5 EC2 nodes. The nodes can communicate using the private IP addresses just fine, but get connection failures when using the private internal DNS name. Localhost also fails. I am trying to use the…
MeanwhileInHell
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What happens when I insert empty column families in cassandra. How many memtables and sstables will be created?

What happens when I insert empty column families in cassandra. How many memtables and sstables will be created ?
Milindkumar Shinalkar
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Can't remove tombstones cells in Cassandra

we are using a cassandra single node cluster for experimenting and one problem we are hitting now is tombstones cells. Each row contain 2 tombstone cells and we are stuck in trying to remove them. They are causing abortion of our queries as…
BangTheBank
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Trigger compactions when TWCS TTL changes in Cassandra 3.0

I have a table in cassandra where I saved data using clients TTL = 1 month (tables TTL is 0), the table is configured with time window compaction strategy. Everyday Cassandra cleaned one single sstable containing expired data from one month ago.…
Hohenheimsenberg
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Unable to start Cassandra cluster after configure SSL configuration

I configured client-node encryption using reference http://cloudurable.com/blog/cassandra-ssl-cluster-setup/index.html cassandra version 2.1.16 java version jdk1.8.0_131 JCE version JAVA 8 netty-all-4.0.23.Final Python version Python 2.7.5 some one…
sateesh
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.UnavailableSocketError: Inet address 127.0.0.1:7000 is not available

I tried to create a cluster with three Cassandra nodes on my machine.I have unpacked tar.gz and changed listen and rpc_addresses, also JMX_PORT.It did not work ~/apache-cassandra-3.11.1-1/bin$ nodetool -h 127.0.0.02 -p 8081 ring nodetool: Failed to…
MikiBelavista
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Not able to open doors on router

I have a Cassandra broker in my lan and I want to allow to execute query on it from the web. So I made an association on my router (vodafone station revolution) between the external port 9042 with the internal port 9042 (both in port forwarding and…
Akinn
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Cassandra initial token in cassandra.yaml

I followed the following steps to migrate all the data from one cluster to a completely new cluster: http://datascale.io/cloning-cassandra-clusters-fast-way/ I managed to get all the data to the new cluster, the servers see each other, nodetool…
Vladimir
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Ubuntu - Install cassandra version 3.0.9 fails: Version '3.0.9' for 'cassandra' was not found

I have ansible scripts that were used to provision some cassandra servers a couple months ago. They are failing now on this command: ubuntu@ip-172-30-0-193:~$ sudo apt-get install cassandra=3.0.9 Reading package lists... Done Building dependency…
Drew
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PHP 7.0 extcassandra on Centos 7

Am I doing anything wrong when installing php with cassandra extension on a CentosOS 7 server? For dependencies I install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm and…
Wanderson Silva
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opscenter "services" tab greyed out

Was hoping to set up an s3 snapshot with my cassandra cluster running opscenter 5.2.4/Cassandra 2.2.7 but for some reason the services menu is greyed out. Cluster stats and information seem fine so it can at least connect to all my nodes. Anyone…
Ethan Shrago
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Docker swarm and volumes

Considering Docker 1.12. I understand that volumes are not per say portable across the swarm and that solutions like Flocker would be better for larger clusters. Nevertheless, is the option I describe below acceptable for my setup? Setup A swarm…
Cedric H.
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Cassandra hang on startup

I'm running cassandra 3.0.6 and i'm seeing it hang when i start the cassandra service about 1/4 of the time. Is anyone else seeing this? Has anyone else had this problem? I end up having to restart the system during the startup process which…
Highstead
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