cassandra-top | Cassandra top command to monitor cluster without Datastax

by jamesbriggs Shell Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | cassandra-top Summary

cassandra-top is a Shell library typically used in Big Data, Prometheus, Hadoop applications. cassandra-top has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

The Cassandra top command, cass_top, is a friendly UI for monitoring clusters, similar to the top command, and shows menus to build and run nodetool commands.

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Support

cassandra-top has a low active ecosystem.

It has 13 star(s) with 3 fork(s). There are 4 watchers for this library.

It had no major release in the last 6 months.

cassandra-top has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of cassandra-top is current.

Quality

cassandra-top has no bugs reported.

Security

cassandra-top has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

cassandra-top does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

cassandra-top releases are not available. You will need to build from source code and install.

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cassandra-top Key Features

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cassandra-top Examples and Code Snippets

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Community Discussions

Trending Discussions on cassandra-top

Cassandra assertion error after starting the second node

Cannot change Cassandra datacenter

Starting minimalistic standalone cassandra is not working via "cassandra -f"

Unable to write entries in Cassandra when 2 out of 3 nodes down

QUESTION

Cassandra assertion error after starting the second node

Asked 2020-Jul-21 at 09:32

I have a Cassandra cluster with two nodes with simple replication strategy.

Everything worked well until one of nodes crashed. I recovered the crashed node by cloning the remaining node virtual machine (so we cloned a file system), and updated the listening and RPC address.

Now I keep getting the following strange error.

When I am running each single node, everything is working well. But when I am starting the second node, the first one falls back with an error!

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ANSWER

Answered 2020-Jul-21 at 09:32

If you cloned the virtual machine with all data, then you have all data of the first node, including the node's ID. To solve this problem, shutdown the 2nd node, delete all data from the data_file_directories and commit logs, leave only the first node as a seed node, and then start the 2nd node, so it will join the cluster as normal, and after this process finished, update the seed list (if you leave the 2nd node in the seed list, it won't join the cluster, but bootstrap a new cluster).

Source https://stackoverflow.com/questions/63010128

QUESTION

Cannot change Cassandra datacenter

Asked 2020-Apr-08 at 13:43

After cassandra install via sudo apt install -y cassandra, cassandra is running, but I have not yet configured cassandra.yaml and cassandra-topology.properties. Once I configure them cassandra won't start because Cannot start node if snitch's data center (0) differs from previous data center (datacenter1)

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ANSWER

Answered 2019-Nov-26 at 17:15

Assuming that you don't care about the data stored, you can fix that by deleting everything in your data_file_directories. If you're not setting that, you'll find it at $CASSANDRA_HOME/data/data.

Basically, the cluster metadata gets written in the system keyspace, which uses the local replication strategy (system is unique on each node). At start time, Cassandra verifies the stored metadata vs. the config properties being passed. When you change something about the node, Cassandra will throw an error on specific properties like cluster_name, dc, rack (and possibly a few others) when they don't match what's on disk.

tl;dr;

You probably only need to delete only the data for the system keyspace.

But another option, would be to uncomment and set data_file_directories. Then the new node's system metadata would be written there, and the node would start.

Source https://stackoverflow.com/questions/59054999

QUESTION

Starting minimalistic standalone cassandra is not working via "cassandra -f"

Asked 2019-Mar-11 at 06:15

The latest cassandra was downloaded from the website. I am following the directions at https://medium.com/@areeves9/cassandras-gossip-on-os-x-single-node-installation-of-apache-cassandra-on-mac-634e6729fad6

Cassandra is installed:

...

ANSWER

Answered 2019-Mar-11 at 05:38

Set a system variable like this:

System.setProperty("cassandra.config", "file:////cassandra.yaml");

Source https://stackoverflow.com/questions/55095699

QUESTION

Unable to write entries in Cassandra when 2 out of 3 nodes down

Asked 2018-Jan-17 at 10:36

I'm inserting data in Cassandra via C++. I've got 2 datacentres and total 3 nodes distributed among the 2 datacentres(dc1 and dc2). As I'm doing some experiments, so I've stopped Cassandra on 2 of the nodes. Now when I try to write data into the one remaining node, I get errors like "no hosts available". Since in the C++ program, I've not mentioned any consistency for the write statement, then why is it not working. I had read that the default write consistency was local one, therefore I should be able to write data even when only one out of 3 nodes is up.

dc1 has 2 nodes and dc 2 has 1 node. replication strategy: network topology, dc1: 2, dc2: 1 Cassandra: 3.0.14 RHEL 6

Edit: The problem was sorted out after I changed 2 things and restarted my cluster: 1. I configured the cassandra-topology.properties. Initially it was not set with the right values. 2. I synced the time between the 3 nodes. I don't know which one(if not both) solved the problem.

...

ANSWER

Answered 2018-Jan-09 at 08:25

If the keyspace you are writing to is set with RF > 1, than it means the data must be written in more than 1 replica (more than 1 node) and since only 1 node remains active, that does not satisfy the RF settings.

I assume this is the reason for the error you see.

Source https://stackoverflow.com/questions/48145621

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Vulnerabilities

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Install cassandra-top

You can download it from GitHub.

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