nodetool enablehintsfordc

Where is the cassandra-env.sh file?

The location of the cassandra-env.sh file depends on the type of installation:

Installation Type Location

Package installations + Installer-Services installations

/etc/dse/cassandra/cassandra-env.sh

Tarball installations + Installer-No Services installations

<installation_location>/resources/cassandra/conf/cassandra-env.sh

Where is the cassandra.yaml file?

The location of the cassandra.yaml file depends on the type of installation:

Installation Type Location

Package installations + Installer-Services installations

/etc/dse/cassandra/cassandra.yaml

Tarball installations + Installer-No Services installations

<installation_location>/resources/cassandra/conf/cassandra.yaml

Enable hints for a datacenter.

Synopsis

nodetool [options] enablehintsfordc [--] <datacenter>

Tarball and Installer No-Services path:

<installation_location>/resources/cassandra/bin
Connection options
Short Long Description

-h

--host

Hostname or IP address.

-p

--port

Port number.

-pwf

--password-file

Password file path.

-pw

--password

Password.

-u

--username

Remote JMX agent username.

datacenter

The datacenter to enable.

--

Separates an option from an argument that could be mistaken for an option.

  • For tarball installations, execute the command from the <installation_location>/bin directory.

  • If a username and password for RMI authentication are set explicitly in the cassandra-env.sh file for the host, then you must specify credentials.

  • nodetool enablehintsfordc operates on a single node in the cluster if -h is not used to identify one or more other nodes. If the node from which you issue the command is the intended target, you do not need the -h option to identify the target; otherwise, for remote invocation, identify the target node, or nodes, using -h.

  • [--] can be used to separate command-line options from the list of arguments, when the list might be mistaken for options.

Description

The nodetool enablehintsfordc command is used to turn on hints for a datacenter. The cassandra.yaml file has a parameter, hinted_handoff_disabled_datacenters that will blacklist datacenters on startup. If a datacenter can be enabled later with nodetool enablehintsfordc.

Examples

 $ nodetool -u username -pw password enablehintsfordc DC2

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