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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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Changing network interface will cause cassandra node fail?

I have a dse-cassandra cluster for use in production. I would like to attach an network-interface to every node. If I add the ip address of that interface on each cassandra config; would it break the cluster?
Sachin PK
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cassandra unable to create thrift socket

I do not know why i am not able to enable thrift protocol on cassandra. in cassandra.yaml rpc_start=true port=9160. OS centos 7 iptables not running firewalld not running cassandra ver 3.7 (datastax repo) up and running. java version…
Raffaello
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Cassandra 2.2 - "nodetool repair" VS "nodetool repair -dc dc1,dc2,dc3"

I want to completely repair a Cassandra 2.2 cluster composed of 3 datacenters (dc1, dc2, dc3) by running only one single command line on a single node. Do I need to run? nodetool repair or nodetool repair -dc dc1,dc2,dc3 or I'm totally wrong? are…
Greg M.
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Cassandra 2.2 - Streaming errors at repair/bootstrap/decommission

We're using Cassandra 2.2.7 and we get strange streaming issues when repairing/bootstrapping/decommissioning some nodes. As an example, I was trying to decommission a fresh bootstrapped node and I immediately got the following errors on the…
Greg M.
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Cassandra nodes disk space usage above 90%

Hi I'm running a 5 node dse cassandra cluster. Every node is about 90 % disk usage ,so I've deleted data from my keyspace(I've only one keyspace).but my disk space is still 90 % .Is there anyway to regain disk space of deleted data ??
Sachin PK
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cassandra data migration from regular drive to SSD on production server

we want migrate our data from regular drives on production server to new SSD drives. how we can do that without taking down the node no longer than 4 hours(hinted hand-off is 4 hours) our data is in few hundreds of GigaBytes. what i was thinking is…
user6288321
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cassandra nodetool drain running for days

We are having performance problems with our cluster regarding to timeouts when repairs are running or massive deletes. One of the advice I received was update our casssandra version from 2.0.17 to 2.2. I am draining one of the nodes to start the…
ftrujillo
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LDAP Cassandra OpsCenter Configuration With AD

I have an OpsCenter that I need to connect to AD. The relevant configuration below: [authentication] enabled = True authentication_method = LDAP audit_pattern = ldaplog [ldap] server_host = ldap.very.chill.domain server_port = 389 uri_scheme =…
user3081519
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How do I properly update expired cassandra SSL certificates?

I have a cassandra cluster where each node has a self-signed certificate generated by keytool. The certificates were generated around the same time and all expired recently. Internode SSL communication appears unaffected, but some clients (including…
Andrew
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Opscenter can not connect to the nodes

Our opscenter can not connect to the nodes, in the logs the next error appears: 2015-08-17 08:56:37+0200 [SNPaware_Cluster] INFO: Nodes with agents that appear to be no longer running: 172.31.7.245, 172.31.7.244, 172.31.7.247, 172.31.7.246,…
ftrujillo
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Using external IP with DataStax Enterprise

We are in a situation where we need Cassandra nodes to be accessible from an external IP, but there is no interface with that IP; traffic to that IP is NATted to the node. Per DataStax's documentation, we have set listen_address to the internal IP…
E. Arvidson
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Cassandra 2.0.16 pending tasks reporting bug?

Yesterday I upgraded my Cassandra cluster from 2.0.14 to 2.0.16, after upgrade, I am start seeing some strange behaviours of "PendingTasks" reporting. The Cassandra repository I am using is datastax, steps I performed for upgrade: yum update -y…
LazyAdmin
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Cannot add an existing Cassandra cluster to OpsCenter ('ascii' codec can't encode character)

While trying to add an existing Cassandra cluster to OpsCenter I encountered the following error: Error creating cluster: 'ascii' codec can't encode character u'\u03a7' in position 0: ordinal not in range(128) This was in the OpsCenter…
Gene
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Trouble configuring Opscenter (5.1.1) Email alerts

I was wondering if anyone could assist me in figuring out why my opscenter email alerts aren't working. My environment is docker running in native network mode with opscenter in a container. Everything is running on a private network but can…
Tom Jordan
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EBS vs Instance Local storage for MongoDB in ec2

Cassandra recommends using instance local storage for EC2 deployments instead of EBS I am deploying MongoDB in EC2... should I also be using instance local storage instead of EBS PIOPS?
steve landiss
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