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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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How to install old version of datastax-agent for opscenter in cassandra

when i am trying to manually install agents through yum latest version of agent is getting installed rather than the version i am currently using, how can i install the version of agent i want do i need to specify anything in datastax repo ?? I…
user6288321
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how to read statistics.db and summary.db file in cassandra

i am trying to read the Statistics.db file and summary.db file but i couldn't read I want to know what is the data that will be stored in it, any specific format. if so what is the format and what data regarding partition it stores. how can i…
user6288321
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Cassandra 3.x on Kubernetes 1.2-release (5 cassandra nodes)

Has anyone been able to get cassandra 3.x running on kubernetes? cassandra 2.1.13 runs great but 3.3 is have trouble talking to other cassandra nodes. My yamls are the same except for the container. I just upgraded…
user2363318
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why is nodetool (cassandra single node) throwing NameNotFoundException: 'jmxrmi'?

Ubuntu 14.04 3.19.0-30-generic running cassandra 3.0.2. and oracle java version "1.8.0_72" i can see the port listening: 127.0.0.1:7199 0.0.0.0:* LISTEN 26048/java when i try checking status: nodetool status …
strzelecki.maciek
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Adding a new node to a Cassandra deployment

I have a basic Cassandra deployment that contains a single node. I want to add a second node to the deployment, and I want clients to have access to the same data regardless of which node they happen to be talking with (i.e. inside of a given…
aroth
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Cassandra JMX doc pointers

Any good starting URL/pointers for reading up on what could be monitored through JMX on cassandra 2.0? Think off pull data into an existing ELK stack from JMX on new Cassandra clusters, but never really dealt with JMX before.
Steffen Winther Sørensen
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How to start large cluster in reasonable time?

I have to start a large cassandra cluster and starting one node at a time will be painful. I don't want to set cassandra.consistent.rangemovement=false permanently but is there a way to set it only for the first start.
Usman Ismail
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Cassandra security using openssl (not keytool)

I saw Cassandra documentation. http://docs.datastax.com/en/cassandra/2.1/cassandra/security/secureSSLCertificates_t.html I found this line "SSL certificates must be generated using keytool". But I have my self-signed CA (easy-rsa openSSL), that is…
Mark Taylor
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Cassandra adding new datacenter in runing cluster

I am using cassandra dse 4.7, 3 node running cluster with one data center, now we are planning to add another data center with 3 nodes. I followed the steps mentioned…
Rajnish
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How to solve ConfigurationException: Missing required directive CommitLogSync while configuring a multi node Cassandra cluster on Centos7?

Aim: to configure a multi node Cassandra cluster on Centos7 Method This documentation is used to configure a multi node Cassandra cluster. [user@cassandra01 ~]$ cat /etc/cassandra/conf/cassandra.yaml cluster_name: 'MyCassandraCluster' num_tokens:…
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Why can't I create nodes on EC2 default network with OpsCenter 5.2.1?

I've had to update our DataStax OpsCenter service from 5.1.3 to 5.2.1 because when I tried to add a new node to our Cassandra Cluster (DSE 4.6.6 on Amazon EC2) it said that "No nodes were available to retrieve a configuration from." Updating to…
kuteninja
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How to scale Cassandra cluster vertically

I have a 3 node Cassandra cluster which I set up a year ago and it is getting quite slow now. It is much cheaper for me to scale vertically than it would be to scale horizontally ( I received free RAM and new gigabit nic cards which I want to put…
user2924127
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Datastax Agent 5.1.3 Short os-stats collector failed

after starting datastax agent 5.1.3 on our new servers we are getting following error in the agent.log. ERROR [os-metrics-6] 2015-08-05 13:49:41,565 Short os-stats collector failed java.lang.NullPointerException at…
Olqs
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Opscenter 5.2 missing data for 1day and 1week graph scale

I recently update Opscenter from 5.1 to 5.2, and yesterday just discovered that if I select different 1day or 1week graph scales no data will be shown in the graph. I checked the logs and the chrome console and no issue there, the requests just got…
Luigi
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Unattended install (upgrade) of cassandra via chef

I'm creating a cassandra upgrade/install recipe with chef. package "cassandra" do version "2.1.8" action :install end When I install over the top of an existing version I get prompted about new config files. Configuration file…
jorfus
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