If we have added new nodes to a C* ring, do we need to run "nodetool cleanup" to get rid of the data that has now been assigned elsewhere? Or is this going to happen anyway during normal compaction...

I have a 2 node apache cassandra (2.0.3) cluster with rep factor of 1. I change rep factor to 2 using the following command in cqlsh ALTER KEYSPACE "mykeyspace" WITH REPLICATION = { 'class' : 'Sim...

i installed cassandra 3.11.3-1 on centos7 & vmware i didn't have error while installing cassandra. i started cassandra and faced this logs. [root@localhost ~]# service cassandra start Star...

Cassandra nodetool throws an error after updating OpenJDK nodetool status nodetool: Failed to connect to '127.0.0.1:7199' - URISyntaxException: 'Malformed IPv6 address at index 7: rmi://[127.0.0.1]...

I cant find it in cassandra.yaml, maybe nodetool can get me the configured replication factor of my cluster? What is the default value of the replication factor?

I am currently working on the Cassandra tutorials about data modeling. I cannot understand why whenever I try to run the cassandra service from the bin folder I receive the error: "Cassandra: co...

Recently I've started working on Grails integration with Cassandra using the Java driver for cassandra(cassandra-driver-core-2.0.2). So I was curious to know how we can find out how much size our t...

When I run the command $ nodetool help I get the following error; java.lang.NullPointerException at org.apache.cassandra.config.DatabaseDescriptor.getDiskFailurePolicy(DatabaseDescriptor.java:18...

I have a 19-node Cassandra cluster for our internal service. If I log into a node using nodetool and run commands like tablestats, etc, does that gather stats just for that particular node or for t...

To remove a node from 2 node cluster in AWS I ran nodetool removenode <Host ID> After this I was supposed to get my cluster back if I put all the cassandra.yaml and cassandra-rackdc.propert...

I'm running a Cassandra cluster with version 2.2.3. The cluster consists of 3 nodes now, two of them are seeds and one is a normal node. When I start repair on each node (command: nodetool repair ...

I am using apache-cassandra-3.10 I understand instead of kill -9 pid, the only way to stop cassandra gracefully is nodetool stopdaemon. But I want to know if nodetool stopdaemon also flushes the ...

After posting a question and reading this and that articles, I still do not understand the relations between those three operations- Cassandra compaction tasks nodetool repair nodetool cleanup ...

I`m using Cassandra dsc 2.1.5 with 3 nodes, and the following table description: cqlsh> DESCRIBE TABLE mykeyspace.mytable; CREATE TABLE mykeyspace.mytable ( a text, b text, c timestamp, d tim...

Through ops-center and nodetool cfstats i was able to find that one of the partitions of a keyspace table is 560 Mb, but couldn't find out which partition is that. How can we trace which partition ...

I am new to Cassandra, in this example i am using a cluster with 1 DC and 5 nodes and a NetworkTopologyStrategy with replication factor as 3. Keyspace: activityfeed Read Count: 0 Read Latency: ...

How to read the cassandra nodetool histograms percentile and other coulmns? Percentile SSTables Write Latency Read Latency Partition Size Cell Count (micros) (micros) (bytes) 50% 1.00 14.24 4055...

The documentation for nodetool compact says: This command starts the compaction process on tables that use the SizeTieredCompactionStrategy and DateTieredCompactionStrategy. You can specify a ...

We have a big Cassandra cluster 18 Servers (on one server near 5T data ) http://docs.datastax.com/en/cassandra/2.0/cassandra/operations/ops_add_node_to_cluster_t.html - We have added a new nodes f...

From the documentation: Using the nodetool repair -pr (–partitioner-range) option repairs only the primary range for that node, the other replicas for that range still have to perform the Merkle...

I cannot find documentation on the "compactionstats": While using nodetool compactionstats, what do the numerical values on the completed and total columns mean? My column family has a total data ...

I am trying to use nodetool against our Cassandra production database. But I am getting exception as soon as I try to start nodetool against Cassandra production cluster from my local machine. S:\...